Sound output device

Abstract

The application discloses a sound output device. The sound output device comprises a vibration loudspeaker, an air conduction loudspeaker and a signal processing module, the signal processing module comprises a bone conduction signal processing circuit and an air conduction signal processing circuit, the vibration loudspeaker comprises a first vibration component, the first vibration component is electrically connected with the bone conduction signal processing circuit to receive a bone conduction control signal and generate a bone conduction sound wave based on the bone conduction control signal, the air conduction loudspeaker comprises a shell and a second vibration component, the second vibration component is electrically connected with the air conduction signal processing circuit to receive an air conduction control signal and generate an air conduction sound wave based on the air conduction control signal, the first vibration component comprises a vibration plate connected with the shell and used for generating the bone conduction sound wave, and the second vibration component comprises a diaphragm connected with the shell and used for generating the air conduction sound wave. In the above manner, the listening effect and the sound leakage problem of the traditional sound output device can be improved, so that the experience of the user is enhanced.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 201980102823.6, filed on December 13, 2019, entitled "Sound Output Device". Technical Field

[0002] This application relates to the field of acoustics, and more particularly to a sound output device. Background Technology

[0003] Currently, wearable devices with acoustic output capabilities are emerging and becoming increasingly widespread. In particular, an open-ear hearing method (i.e., one that does not require inserting or covering the ears with acoustic devices) is being increasingly used in wearable devices due to its health and safety advantages. This open-ear hearing method can be achieved through air conduction or bone conduction. However, air conduction requires larger acoustic devices and structures and also results in significant sound leakage. Bone conduction, on the other hand, produces strong low-frequency vibrations and often causes some sound leakage. These issues negatively impact the listening experience of this open-ear hearing method, limiting its application.

[0004] Therefore, there is a need to provide a sound output device that improves the sound quality when the ear is open and addresses the problem of sound leakage. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this section is not intended to identify key or essential parts of this application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] This application provides a sound output device capable of generating and outputting bone conduction (hereinafter referred to as "bone conduction") sound waves and air conduction (hereinafter referred to as "air conduction") sound waves. It achieves various combinations of auditory and tactile stimuli by adjusting the acoustic characteristics (e.g., phase, amplitude, frequency band) of the bone conduction sound waves and air conduction sound waves to improve the listening effect and reduce external sound leakage, thereby enhancing the user experience.

[0007] One aspect of this application provides a sound output device. The sound output device includes: a vibrating speaker configured to generate bone conduction sound waves; and an air conduction speaker configured to generate air conduction sound waves.

[0008] According to some embodiments of this application, the sound output device is configured to output sound waves within a target frequency range, wherein the bone conduction sound waves include the high-frequency portion of the target frequency range, and the air conduction sound waves include the low-frequency portion of the target frequency range.

[0009] According to some embodiments of this application, the vibration speaker is also configured to generate low-frequency vibration waves that are perceptible to the user's skin.

[0010] According to some embodiments of this application, the bone-conducted sound wave includes the mid-frequency portion of the target frequency range, and the air-conducted sound wave includes the mid-frequency portion of the target frequency range.

[0011] According to some embodiments of this application, the bone conduction sound wave includes the low-frequency portion of the target frequency range, and the bone conduction sound wave is superimposed on the air conduction sound wave, such that the output of the sound output device at the low to mid-frequency range is greater than its output at the mid to high-frequency range.

[0012] According to some embodiments of this application, the air-conducted sound wave includes the mid-frequency portion of the target frequency range, the bone-conducted sound wave includes the low-frequency and mid-frequency portions of the target frequency range, and the bone-conducted sound wave covers a wider frequency range than the air-conducted sound wave.

[0013] According to some embodiments of this application, the air-conducted sound wave includes a mid-frequency portion and a high-frequency portion of the target frequency range, the bone-conducted sound wave includes a mid-frequency portion of the target frequency range, and the air-conducted sound wave covers a wider frequency range than the bone-conducted sound wave.

[0014] According to some embodiments of this application, the air-conducted sound waves and the bone-conducted sound waves share a common attenuation frequency.

[0015] According to some embodiments of this application, the vibrating loudspeaker is coupled to the air-conducting loudspeaker via a mechanical structure, and the bone-conducting sound waves are at least partially input to the air-conducting loudspeaker as input signals.

[0016] According to some embodiments of this application, the sound output device further includes: a signal processing module configured to generate a control signal, wherein the vibrating speaker includes a vibration component electrically connected to the signal processing module to receive the control signal and generate the bone conduction sound wave based on the control signal, and the air conduction speaker includes a housing coupled to the vibration component and generates the air conduction sound wave based on the bone conduction sound wave.

[0017] According to some embodiments of this application, the connection between the housing and the vibration assembly is a rigid connection.

[0018] According to some embodiments of this application, the housing is connected to the vibration assembly via an elastic element.

[0019] According to some embodiments of this application, the sound output device is an earphone, wherein the earphone has a quadrilateral structure.

[0020] According to some embodiments of this application, the housing includes a sound outlet, wherein the air-conducted sound wave is output from the interior of the housing to the exterior of the housing through the sound outlet.

[0021] According to some embodiments of this application, the air-conducting loudspeaker includes a tuning mesh that covers the sound outlet to adjust the frequency of the air-conducting sound waves.

[0022] According to some embodiments of this application, the sound output device is an earphone.

[0023] According to some embodiments of this application, the sound outlet is oriented such that it faces away from the user's temple when the sound output device is located at the user's temple.

[0024] According to some embodiments of this application, the sound outlet is oriented such that when the sound output device is located at the user's temple, it faces the user's external auditory canal.

[0025] According to some embodiments of this application, the sound outlet is oriented such that when the sound output device is located at the user's temple, it faces behind the user's ear.

[0026] According to some embodiments of this application, the sound outlet is oriented such that when the sound output device is located at the user's temple, it faces the top of the user's head.

[0027] According to some embodiments of this application, the sound output device further includes: a signal processing module configured to generate a control signal, wherein the vibrating speaker includes a vibration component electrically connected to the signal processing module to receive the control signal and generate the bone conduction sound wave based on the control signal, wherein the air conduction speaker includes a housing coupled to the vibration component and generates the air conduction sound wave under the action of the vibration component.

[0028] According to some embodiments of this application, the vibration assembly includes: a magnetic circuit system configured to generate a first magnetic field; a vibrating plate connected to the housing; and a coil connected to the vibrating plate and electrically connected to the signal processing module, the coil receiving the control signal and generating a second magnetic field based on the control signal, the first magnetic field interacting with the second magnetic field to cause the vibrating plate to generate the bone conduction sound waves.

[0029] According to some embodiments of this application, the air-conducting loudspeaker further includes a diaphragm connected to the magnetic circuit system and the housing, wherein the interaction between the first magnetic field and the second magnetic field causes the diaphragm to generate the air-conducting sound wave.

[0030] According to some embodiments of this application, the vibrating plate and the housing define a cavity, and the magnetic circuit system and the diaphragm are located within the cavity.

[0031] According to some embodiments of this application, the housing includes a tuning hole, and the air-conducting loudspeaker includes a tuning mesh that covers the tuning hole.

[0032] According to some embodiments of this application, the vibrating plate includes a sound outlet, wherein the air-conducted sound wave is output from the inside of the housing to the outside of the housing through the sound outlet.

[0033] According to some embodiments of this application, the air-conducting loudspeaker includes a tuning mesh that covers the sound outlet.

[0034] According to some embodiments of this application, the housing includes a sound outlet, wherein the air-conducted sound wave is output from the interior of the housing to the exterior of the housing through the sound outlet.

[0035] According to some embodiments of this application, the air-conducting loudspeaker includes a tuning mesh that covers the sound outlet.

[0036] According to some embodiments of this application, the magnetic circuit system is connected to the housing via a first elastic element.

[0037] According to some embodiments of this application, the magnetic circuit system is connected to the vibrating plate via a first elastic element, and the vibrating plate is connected to the housing via a second elastic element.

[0038] According to some embodiments of this application, the vibration assembly includes: a magnetic circuit system configured to generate a first magnetic field; and a vibrating plate connected to the housing via an elastic element, wherein the air-conducting loudspeaker further includes: a diaphragm connected to the housing; and a coil connected to the diaphragm and electrically connected to the signal processing module, the coil receiving the control signal and generating a second magnetic field based on the control signal, the first magnetic field interacting with the second magnetic field to cause the vibrating plate to generate the bone conduction sound waves and the diaphragm to generate the air conduction sound waves.

[0039] According to some embodiments of this application, the air-conducting loudspeaker includes a sound guide tube that communicates with the sound outlet.

[0040] According to some embodiments of this application, the sound guide tube is configured such that the phase of the air-conducted sound wave is opposite to the phase of the sound leakage from the vibrating plate.

[0041] According to some embodiments of this application, the housing includes a tuning hole, and the air-conducting loudspeaker includes a sound guide tube connected to the tuning hole.

[0042] According to some embodiments of this application, the housing includes a tuning hole, and the air-conducting loudspeaker includes a passive diaphragm connected within the tuning hole and configured to vibrate under the action of the air-conducting sound waves to generate air-conducting sound waves.

[0043] According to some embodiments of this application, the signal processing module includes: a bone conduction signal processing circuit configured to generate a bone conduction control signal; and an air conduction signal processing circuit configured to generate an air conduction control signal; the vibrating loudspeaker includes: a first vibration component electrically connected to the bone conduction signal processing circuit to receive the bone conduction control signal and generate the bone conduction sound wave based on the bone conduction control signal; the air conduction loudspeaker includes: a second vibration component electrically connected to the air conduction signal processing circuit to receive the air conduction control signal and generate the air conduction sound wave based on the air conduction control signal.

[0044] According to some embodiments of this application, the first vibration component includes: a magnetic circuit system configured to generate a first magnetic field; a vibrating plate connected to the housing via an elastic element; and a first coil connected to the vibrating plate and electrically connected to the bone conduction signal processing circuit, the first coil receiving the bone conduction control signal and generating a second magnetic field based on the bone conduction control signal, the first magnetic field interacting with the second magnetic field to cause the vibrating plate to generate the bone conduction sound wave; the second vibration component includes: a diaphragm connected to the housing; and a second coil connected to the diaphragm and electrically connected to the air conduction signal processing circuit, the second coil receiving the air conduction control signal and generating a third magnetic field based on the air conduction control signal, the first magnetic field interacting with the third magnetic field to cause the diaphragm to generate the air conduction sound wave.

[0045] According to some embodiments of this application, the magnetic circuit system is connected to the housing via an elastic element.

[0046] According to some embodiments of this application, the housing includes a sound outlet and a tuning hole, and the air-conducting loudspeaker has a first tuning mesh and a second tuning mesh, the first tuning mesh covering the sound outlet and the second tuning mesh covering the tuning hole.

[0047] According to some embodiments of this application, the bone conduction signal processing circuit includes a full-frequency signal processing module configured to generate a bone conduction output signal based on an initial acoustic signal; the air conduction signal processing circuit includes: a frequency division module configured to decompose the initial acoustic signal into high-frequency components and low-frequency signal components; a high-frequency signal processing module coupled to the frequency division module and configured to generate a high-frequency output signal based on the high-frequency signal components; and a low-frequency signal processing module coupled to the frequency division module and configured to generate a low-frequency output signal based on the low-frequency signal components.

[0048] According to some embodiments of this application, the bone conduction signal processing circuit includes a first power amplifier configured to amplify the bone conduction output signal into the bone conduction control signal; the air conduction signal processing circuit includes a second power amplifier configured to amplify the high-frequency output signal into a high-frequency air conduction control signal; and a third power amplifier configured to amplify the low-frequency output signal into a low-frequency air conduction control signal.

[0049] According to some embodiments of this application, the air-conducting loudspeaker includes: a high-frequency air-conducting loudspeaker configured to generate high-frequency air-conducting sound waves based on the high-frequency control signal; and a low-frequency air-conducting loudspeaker configured to generate low-frequency air-conducting sound waves based on the low-frequency control signal.

[0050] According to some embodiments of this application, the air conduction signal processing circuit includes a signal synthesis module, which is coupled to the high-frequency signal processing module and the low-frequency signal processing module and configured to synthesize the high-frequency output signal and the low-frequency output signal into an air conduction output signal.

[0051] According to some embodiments of this application, the bone conduction signal processing circuit includes a first power amplifier configured to amplify the bone conduction output signal into the bone conduction control signal, and the air conduction signal processing circuit includes a second power amplifier configured to amplify the air conduction output signal into the air conduction control signal.

[0052] According to some embodiments of this application, the signal processing module further includes: a microphone configured to acquire an ambient noise signal; and a noise signal processing module coupled to the microphone and the air conduction signal processing circuit, and configured to reduce noise in the air conduction output signal based on the ambient noise signal.

[0053] According to some embodiments of this application, the signal processing module further includes: a first microphone configured to acquire an ambient noise signal; a noise signal processing module coupled to the first microphone and configured to generate a noise reduction signal based on the ambient noise signal; and a fourth power amplifier coupled to the noise signal processing module and configured to amplify the noise reduction signal. The air-conducting loudspeaker further includes: an auxiliary air-conducting loudspeaker coupled to the fourth power amplifier and configured to output air-conducting sound waves based on the amplified noise reduction signal.

[0054] According to some embodiments of this application, the signal processing module further includes: a microphone configured to acquire sound signals from the area to be denoised and generate an error signal based on the sound signals; and a noise signal processing module coupled to the microphone and the air conduction signal processing circuit, and configured to generate a feedback signal based on the error signal, the feedback signal being used to denoise the air conduction output signal.

[0055] According to some embodiments of this application, the signal processing module further includes: a second microphone configured to acquire sound signals from the area to be denoised and generate an error signal based on the sound signals; and a noise signal feedback module coupled to the second microphone and the noise signal processing module, and configured to generate a feedback signal based on the error signal, wherein the noise signal processing module is configured to generate a noise reduction signal based on the ambient noise signal and the feedback signal.

[0056] According to some embodiments of this application, the signal processing module further includes: a subband decomposition module configured to decompose an initial acoustic signal into multiple signal components, the multiple signal components being located in different sub-frequency bands; a vibration signal processing module configured to generate multiple bone conduction output signals based on the multiple signal components, the multiple bone conduction output signals being located in the different frequency bands; and a sound signal processing module configured to generate multiple air conduction output signals based on the multiple signal components, the multiple air conduction output signals being located in the different frequency bands; a plurality of first power amplifiers coupled to the vibration signal processing module and configured to amplify the multiple bone conduction output signals into bone conduction control signals of corresponding frequency bands; and a plurality of second power amplifiers coupled to the sound signal processing module and configured to amplify the multiple air conduction output signals into air conduction control signals of corresponding frequency bands.

[0057] According to some embodiments of this application, the sound output device further includes: a plurality of vibrating loudspeakers, each coupled to one of the plurality of first power amplifiers and generating bone conduction sound waves of the corresponding frequency band based on bone conduction control signals of the corresponding frequency band; and a plurality of air conduction loudspeakers, each coupled to one of the plurality of second power amplifiers and generating air conduction sound waves of the corresponding frequency band based on air conduction control signals of the corresponding frequency band.

[0058] Another aspect of this application provides a sound output device comprising: a signal processing module configured to generate a control signal; a housing; a magnetic circuit system configured to generate a first magnetic field; a diaphragm connected to the housing; a coil connected to the diaphragm and electrically connected to the signal processing module, the coil receiving the control signal and generating a second magnetic field based on the control signal, the first magnetic field interacting with the second magnetic field to cause the diaphragm to generate bone conduction sound waves; and a diaphragm connected to the magnetic circuit system and the housing, the first magnetic field interacting with the second magnetic field to cause the diaphragm to generate air conduction sound waves.

[0059] According to some embodiments of this application, the vibrating plate and the housing define a cavity, and the magnetic circuit system and the diaphragm are located within the cavity.

[0060] According to some embodiments of this application, the housing includes a sound outlet and a tuning hole, and the sound output device includes a first tuning mesh and a second tuning mesh, wherein the first tuning mesh covers the sound outlet and the second tuning mesh covers the tuning hole.

[0061] According to some embodiments of this application, the sound output device further includes: an elastic element for connecting the magnetic circuit system to the housing.

[0062] According to some embodiments of this application, the sound output device further includes: a first elastic member connecting the magnetic circuit system to the vibrating plate; and a second elastic member connecting the vibrating plate to the housing.

[0063] Another aspect of this application provides a sound output device comprising: a signal processing module configured to generate a control signal; a housing; a magnetic circuit system configured to generate a first magnetic field; a vibrating plate connected to the magnetic circuit system; a diaphragm connected to the housing; and a coil connected to the diaphragm and electrically connected to the signal processing module, wherein the coil receives the control signal and generates a second magnetic field based on the control signal, the first magnetic field interacting with the second magnetic field to cause the vibrating plate to generate bone conduction sound waves and the diaphragm to generate air conduction sound waves.

[0064] According to some embodiments of this application, the vibrating plate and the housing define a cavity, and the magnetic circuit system, the diaphragm, and the coil are located within the cavity.

[0065] According to some embodiments of this application, the housing includes a sound outlet and a tuning hole, and the sound output device includes a first tuning mesh and a second tuning mesh, wherein the first tuning mesh covers the sound outlet and the second tuning mesh covers the tuning hole.

[0066] Another aspect of this application provides a sound output device comprising: a bone conduction signal processing module configured to generate a bone conduction control signal; an air conduction signal processing module configured to generate an air conduction control signal; a housing; a magnetic circuit system configured to generate a first magnetic field; a vibrating plate connected to the housing; a first coil connected to the vibrating plate and electrically connected to the bone conduction signal processing module, the first coil receiving the bone conduction control signal and generating a second magnetic field based on the bone conduction control signal, the first magnetic field interacting with the second magnetic field to cause the vibrating plate to generate the bone conduction sound wave; a diaphragm connected to the housing; and a second coil connected to the diaphragm and electrically connected to the air conduction signal processing module, the second coil receiving the air conduction control signal and generating a third magnetic field based on the air conduction control signal, the first magnetic field interacting with the third magnetic field to cause the diaphragm to generate the air conduction sound wave.

[0067] According to some embodiments of this application, the vibrating plate and the housing define a cavity, and the magnetic circuit system and the diaphragm are located within the cavity.

[0068] According to some embodiments of this application, the housing includes a sound outlet and a tuning hole, and the sound output device includes a first tuning mesh and a second tuning mesh, wherein the first tuning mesh covers the sound outlet and the second tuning mesh covers the tuning hole.

[0069] According to some embodiments of this application, the sound output device further includes: an elastic element for connecting the magnetic circuit system to the housing.

[0070] The sound output device of this application can improve the listening effect and reduce external sound leakage of traditional sound output devices, thereby enhancing the user experience. Attached Figure Description

[0071] This application can be better understood by referring to the description given below in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts. In the drawings:

[0072] Figure 1 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0073] Figure 2 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0074] Figure 3 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0075] Figure 4 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0076] Figure 5 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0077] Figure 6 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0078] Figure 7 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0079] Figure 8 A structural diagram of a sound output device according to an embodiment of this application is shown;

[0080] Figure 9 A structural diagram of a sound output device according to an embodiment of this application is shown;

[0081] Figure 10 A schematic diagram of a resonant system provided according to an embodiment of this application is shown;

[0082] Figure 11 A schematic diagram showing two resonant systems driven by the same driving force is shown.

[0083] Figure 12 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0084] Figure 13 The phase frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0085] Figure 14 A schematic diagram of two resonant systems driven by a pair of opposing driving forces is shown.

[0086] Figure 15 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0087] Figure 16 The phase frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0088] Figure 17A schematic diagram showing two resonant systems driven by different driving forces is shown.

[0089] Figure 18 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0090] Figure 19 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown.

[0091] Figure 20 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0092] Figure 21 The amplitude-frequency characteristics of bone-conducted sound waves and air-conducted sound waves provided according to embodiments of this application are shown;

[0093] Figure 22 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0094] Figure 23 A schematic diagram showing the different positions of the sound outlet is provided;

[0095] Figure 24 The amplitude-frequency characteristics of air-conducted sound waves at different sound outlet positions are shown;

[0096] Figure 25 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0097] Figure 26 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0098] Figure 27 The amplitude-frequency characteristics of sound waves conducted through bones and air are shown.

[0099] Figure 28 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0100] Figure 29 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0101] Figure 30 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0102] Figure 31 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0103] Figure 32 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0104] Figure 33 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0105] Figure 34 A schematic diagram of a sound output device according to an embodiment of this application is shown;

[0106] Figure 35 The amplitude-frequency characteristics of the sound output device provided according to an embodiment of this application are shown;

[0107] Figure 36 The amplitude-frequency characteristics of the sound output device provided according to an embodiment of this application are shown;

[0108] Figure 37 The amplitude-frequency characteristics of the sound output device provided according to an embodiment of this application are shown;

[0109] Figure 38 The amplitude-frequency characteristics of the sound output device provided according to an embodiment of this application are shown;

[0110] Figure 39 The amplitude-frequency characteristics of the sound output module provided according to an embodiment of this application are shown when the head is in different positions.

[0111] Figure 40 The amplitude-frequency characteristics of sound leakage of the sound output module provided according to an embodiment of this application are shown;

[0112] Figure 41 The amplitude-frequency characteristics of sound leakage of the vibration output module provided according to an embodiment of this application are shown;

[0113] Figure 42 A schematic diagram showing the positional relationship between two dipole sound sources according to an embodiment of this application is shown;

[0114] Figure 43 The amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application at different spacings are shown;

[0115] Figure 44 A schematic diagram showing the positional relationship between two dipole sound sources according to an embodiment of this application is shown;

[0116] Figure 45 The normal amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application at different amplitude ratios are shown;

[0117] Figure 46 The axial amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application at different amplitude ratios are shown.

[0118] Figure 47This diagram illustrates the positional relationship between two monopole sound sources according to an embodiment of this application.

[0119] Figure 48 The amplitude-frequency characteristics of two monopole sound sources provided according to embodiments of this application under different phase differences are shown;

[0120] Figure 49 A schematic diagram showing the positional relationship between two dipole sound sources according to an embodiment of this application is shown;

[0121] Figure 50 The relationship between the normal angle and amplitude of two dipole sound sources provided according to embodiments of this application at different frequencies is shown.

[0122] Figure 51 The relationship between the axial angle and amplitude of two dipole sound sources provided according to embodiments of this application at different frequencies is shown.

[0123] Figure 52 This diagram illustrates the positional relationship of five monopole sound sources according to an embodiment of this application.

[0124] Figure 53 The amplitude distribution of five monopole sound sources provided according to embodiments of this application is shown at different frequencies.

[0125] Figure 54 This diagram illustrates the positional relationship of five monopole sound sources according to an embodiment of this application.

[0126] Figure 55 The amplitude distributions of five monopole sound sources provided according to embodiments of this application under different phase differences are shown.

[0127] Figure 56 This diagram illustrates the positional relationship of five monopole sound sources according to an embodiment of this application.

[0128] Figure 57 The amplitude distributions of five monopole sound sources provided according to embodiments of this application at different amplitude ratios are shown.

[0129] Figure 58 This application illustrates various combinations of bone conduction sound waves and air conduction sound waves according to embodiments of the present application;

[0130] Figure 59 The positions of the vibration speaker and air conduction speaker provided according to embodiments of this application at the user's head are shown;

[0131] Figure 60 The amplitude-frequency characteristics of the leakage sound of the vibrating loudspeaker provided according to an embodiment of this application are shown; and

[0132] Figure 61 The amplitude-frequency characteristics of the leakage sound of the vibration loudspeaker provided according to an embodiment of this application at different power levels are shown.

[0133] Those skilled in the art should understand that the elements in the accompanying drawings are shown for simplicity and clarity only, and are not necessarily drawn to scale. Detailed Implementation

[0134] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. These examples are used to illustrate this application but are not intended to limit its scope.

[0135] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of the actual embodiments are described in the specification. It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the device structures and / or processing steps closely related to the solution according to this application are shown in the drawings, while other details that are not closely related to this application are omitted.

[0136] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this disclosure and are within the spirit and scope of the exemplary embodiments of this disclosure.

[0137] It should be understood that the term "and / or" as used in this embodiment includes any or all combinations of one or more of the associated listed items. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element.

[0138] Similarly, it should be understood that when an element such as a layer, region, or substrate is referred to as being "on" another element, it may be directly on that other element, or there may be intermediate elements present. Conversely, the term "directly" indicates the absence of intermediate elements. It should also be understood that the terms "comprising," "containing," "including," and / or "comprises," when used herein, indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0139] It should also be understood that although the terms first, second, third, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, without departing from the teachings of the invention, a first element in some embodiments may be referred to as a second element in other embodiments. The same reference numerals or the same reference signs denote the same elements throughout the specification.

[0140] Furthermore, exemplary embodiments are described with reference to cross-sectional and / or planar diagrams as idealized exemplary illustrations. Therefore, differences from the illustrated shapes are foreseeable due to factors such as manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in shape caused, for example, by manufacturing processes. For instance, etched areas shown as rectangular typically have circular or curved features. Therefore, the regions shown in the figures are substantially schematic, and their shapes are not intended to illustrate the actual shape of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0141] Figure 1 A schematic diagram of a sound output device according to an embodiment of this application is shown. The sound output device 1 may include a signal processing module 2 and an output module 3.

[0142] Signal processing module 2 can be configured to receive an initial acoustic signal from a signal source, process the initial acoustic signal, and output a corresponding control signal. The initial acoustic signal can be any analog acoustic signal directly acquired from the external environment, such as an analog signal (electronic or radio signal) obtained by directly acquiring any perceptible mechanical vibration conducted through air or bones, or any digital or analog signal (electronic or radio signal) converted from an acoustic signal and imported from an external device. Output module 3 can be configured to output corresponding bone conduction sound waves and / or air conduction sound waves according to the control signal output by signal processing module 2. In this application, bone conduction sound waves refer to sound waves transmitted to the ear via bone through mechanical vibration (also known as "bone conduction sound"), and air conduction sound waves refer to sound waves transmitted to the ear via air through mechanical vibration (also known as "air conduction sound"). Low frequency can refer to the frequency band roughly from 20Hz to 150Hz, mid frequency can refer to the frequency band roughly from 150Hz to 5kHz, high frequency can refer to the frequency band roughly from 5kHz to 20kHz, mid-low frequency can refer to the frequency band roughly from 150Hz to 500Hz, and mid-high frequency can refer to the frequency band roughly from 500Hz to 5kHz. Those skilled in the art will understand that the above frequency band distinctions are merely examples to provide approximate ranges. The definitions of these frequency bands can vary depending on different industries, application scenarios, and classification standards. For example, in some application scenarios, low frequency refers to the frequency band roughly from 20Hz to 80Hz, mid-low frequency can refer to the frequency band roughly between 80Hz and 160Hz, mid frequency can refer to the frequency band roughly from 160Hz to 1280Hz, mid-high frequency can refer to the frequency band roughly from 1280Hz to 2560Hz, and high frequency can refer to the frequency band roughly from 2560Hz to 20kHz.

[0143] The output module 3 may further include a vibration speaker 31 and an air-conducting speaker 32. The air-conducting speaker 32 may refer to a speaker that outputs air-conducted sound waves, while the vibration speaker 31 may refer to a speaker that outputs sound waves conducted through a solid medium (such as bone conduction sound waves). The vibration speaker 31 may be coupled to the signal processing module 2 and configured to generate bone conduction sound waves according to the control signal. The air-conducting speaker 32 may be coupled to the signal processing module 2 and configured to generate air-conducted sound waves according to the control signal. The vibration speaker 31 and the air-conducting speaker 32 may be two separate functional devices or part of a single device capable of performing multiple functions. In some embodiments, the signal processing module 2 may be integrated with or formed as a single unit of the vibration speaker 31 and the air-conducting speaker 32.

[0144] Figure 2 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 2The illustrated embodiments and Figure 1 The embodiments shown are similar, with the following differences.

[0145] The signal processing module 2 may further include a bone conduction signal processing circuit 21 and an air conduction signal processing circuit 22. Here, the air conduction signal can refer to an electrical signal related to and / or causing the output of the air conduction sound wave; the bone conduction signal can refer to an electrical signal related to and / or causing the output of the bone conduction sound wave. The bone conduction signal processing circuit 21 may be configured to receive an initial acoustic signal from the signal source, process the initial acoustic signal, and output a corresponding bone conduction control signal. The air conduction signal processing circuit 22 may be configured to receive an initial acoustic signal from the signal source, process the initial acoustic signal, and output a corresponding air conduction control signal. The air conduction control signal refers to a signal that controls the generation and output of the air conduction sound wave; the bone conduction signal refers to a signal that controls the generation and output of the bone conduction sound wave.

[0146] The output module 3 may further include a vibration speaker 31 and an air conduction speaker 32. The vibration speaker 31 may be coupled to the bone conduction signal processing circuit 21 and configured to generate bone conduction sound waves according to the bone conduction control signal. The air conduction speaker 32 may be coupled to the air conduction signal processing circuit 22 and configured to generate air conduction sound waves according to the air conduction control signal. In some embodiments, the bone conduction signal processing circuit 21 may be integrated with or formed as a single unit of the vibration speaker 31. In some embodiments, the air conduction signal processing circuit 22 may be integrated with or formed as a single unit of the air conduction speaker 32.

[0147] To adjust the output characteristics (e.g., frequency, phase, amplitude, etc.) of bone conduction sound waves and air conduction sound waves, the corresponding control signals can be processed in the signal processing module 2 to make the output air conduction sound waves and bone conduction sound waves contain specific frequency components, or the structure or arrangement of each component can be set and optimized in the output module 3 to make the output air conduction sound waves and bone conduction sound waves contain specific frequency components.

[0148] When the properties of the output sound wave are changed by adjusting the signal processing module 2, several filters / filter groups can be set to process the input signal to output signals containing different frequency components, which are then output to the corresponding output modules for sound (air conduction) or vibration (bone conduction) output. The filters / filter groups include, but are not limited to, analog filters, digital filters, passive filters, and active filters. In some embodiments, dynamic range control (DRC), time delay, and reverberation time-domain processing methods can be set to further enhance the richness and experience of the sound. In some embodiments, an active sound leakage reduction module can be set. In some embodiments, a feedback-free method can be used, that is, without using a reference microphone to feedback sound field information, the output module 3 directly outputs a specific frequency band of antiphase sound wave that superimposes and cancels out the leaking sound wave. In some embodiments, a feedback method can also be used, that is, a reference microphone is placed in the sound field to obtain the sound field information at that point, and the signal processing module is fed back in real time to adjust the antiphase sound wave signal, ultimately reducing the sound leakage pressure. In some embodiments, a beamforming module can be provided to control the amplitude and phase of the radiation emitted by each bone conduction or air conduction unit (i.e., the vibrating speaker 31 and the air conduction speaker 32) in the sound output device 1, so that the output sound is synthesized into a certain sound beam. This sound beam can be a fan shape with a certain radiation angle and can propagate in a direction controlled by the user to achieve corresponding directivity, thereby obtaining the maximum sound pressure level near the ear, while the sound pressure level is lower at other locations in the sound field, thus reducing sound leakage. In some embodiments, the sound output device 1 can utilize 3D sound field reconstruction or local sound field control technology to reconstruct a more ideal and three-dimensional sound field, giving people a better immersive sound field experience.

[0149] Figure 3 A schematic diagram of a sound output device according to an embodiment of this application is shown. As shown, the sound output device 1 may include a signal processing module 2, a vibration speaker 31, and an air conduction speaker 32. The signal processing module 2 may include a bone conduction signal processing circuit 21 and an air conduction signal processing circuit 22. The air conduction speaker 32 may include a high-frequency air conduction speaker 328 and a low-frequency air conduction speaker 329.

[0150] Bone conduction signal processing circuitry 21 may include full-frequency signal processing module 210. Full-frequency signal processing module 210 may be configured to generate a bone conduction output signal based on an initial acoustic signal (e.g., a signal acquired from an external sound source or imported from an external device). Full-frequency signal processing module 210 may include an equalizer 211, a dynamic range controller 212, a phase processor 213, and a first power amplifier 214. Equalizer 211 may be configured to individually gain or attenuate the input signal (e.g., the initial acoustic signal) according to specific frequency bands. Dynamic range controller 212 may be configured to compress and amplify the input signal, for example, to make the sound softer or louder. Phase processor 213 may be configured to adjust the phase of the input signal. Power amplifier 204 may be configured to amplify the amplitude of the input signal. In some embodiments, the initial acoustic signal may be processed by equalizer 211, dynamic range controller 212, phase processor 213, and / or first power amplifier 214 to become the bone conduction control signal for controlling the vibrating speaker 31 to generate bone conduction sound waves.

[0151] The equalizer is a device used to adjust specific frequencies in a sound. The dynamic range controller is a device that controls the dynamic range of a signal. Dynamic range control is an adaptive adjustment of the signal's dynamic range. The dynamic range of a signal is the logarithmic ratio of the maximum signal amplitude to the minimum signal amplitude, specified in dB. Dynamic range control can be used to match the audio signal level to its environment, thereby protecting the AD converter from overload. The phase processor is an electronic sound processor used to filter a signal by creating a series of peaks and troughs in the spectrum. The positions of the peaks and troughs of the affected waveform are typically adjusted so that they change over time, producing a sweeping effect.

[0152] The air conduction signal processing circuit 22 may include a frequency divider module 221, a high-frequency signal processing module 222, a low-frequency signal processing module 223, a second power amplifier 224, and a third power amplifier 225. The frequency divider module 221 may be configured to decompose an initial signal from a sound source into high-frequency and low-frequency signal components. In some embodiments, the frequency divider module 221 may also be configured to decompose the initial acoustic signal into signal components of three or more frequency bands. The high-frequency signal processing module 222 may be coupled to the frequency divider module 221 and configured to generate a high-frequency output signal based on the high-frequency signal components. This high-frequency output signal, amplified by the second power amplifier 224, becomes a high-frequency air conduction control signal to control the high-frequency air conduction loudspeaker 328 to generate high-frequency air-conducted sound waves. In some embodiments, the high-frequency signal processing module 222 may include an equalizer 2221, a dynamic range controller 2222, and a phase processor 2223. The low-frequency signal processing module 223 can be coupled to the frequency divider module 221 and configured to generate a low-frequency output signal based on the low-frequency signal components. The low-frequency output signal is amplified by the third power amplifier 225 to become a low-frequency air conduction control signal, which controls the low-frequency air conduction speaker 329 to generate low-frequency air-conducted sound waves. In some embodiments, the low-frequency signal processing module 223 may include an equalizer 2231, a dynamic range controller 2232, and a phase processor 2233.

[0153] The signal processing module 2 in the above embodiment can enhance low frequencies and reduce high-frequency sound leakage. In some open-ear acoustic devices, such as bone conduction headphones, there is often a problem of insufficient low-frequency sound and excessive high-frequency sound leakage. To solve this problem, the sound output device 1 can use a vibration output device (e.g., a vibrating speaker) to output full-frequency vibration or bone conduction sound (or weaken the vibration after the low frequency to reduce the discomfort of low-frequency vibration), so that a person can hear through bone conduction or other means. At the same time, the sound output device 1 uses an air conduction output device (e.g., an air conduction speaker) to output air conduction sound waves. The low-frequency component of this air conduction sound wave can be used to enhance the user's low-frequency sound perception, and the high-frequency component can be used to weaken the high-frequency sound leakage. That is, the high-frequency part of the air conduction sound wave can be used as a canceling frequency sound wave to at least partially weaken the high-frequency part of the bone conduction sound wave. At the same time, a frequency division module is set to divide the audio signal into a high-frequency signal and a low-frequency signal. After the high-frequency signal is processed by the high-frequency signal processing module for amplitude and phase, it is made to have an amplitude and phase that can cancel out the high-frequency sound leakage. The low-frequency signal is processed by a low-frequency signal processing module to achieve amplitude and phase adjustments that enhance low-frequency sound effects. The processed high-frequency and low-frequency air-conduction control signals are then combined to form an air-conduction control signal. This signal is processed by a power amplifier and output as an air-conduction sound wave by the air-conducting speaker. Its high-frequency components cancel out sound leakage caused by the vibrating speaker, while its low-frequency components enhance the low-frequency sound effects.

[0154] Figure 4 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 4 The illustrated embodiments and Figure 3 The embodiments shown are similar, except that, in Figure 4 In the illustrated embodiment, the air conduction signal processing circuit 22 further includes a signal synthesis module 226. The signal synthesis module 226 is coupled to the high-frequency signal processing module 222 and the low-frequency signal processing module 223 and is configured to synthesize the high-frequency output signal and the low-frequency output signal into an air conduction output signal. The air conduction output signal can be amplified via a fifth power amplifier 228 into an air conduction control signal for controlling the air conduction loudspeaker 32 to generate the air conduction sound wave.

[0155] Figure 5 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 5 The illustrated embodiments and Figure 4 The embodiments shown are basically similar, the difference being that, in Figure 5 In the illustrated embodiment, the signal processing module 2 may further include a noise signal processing module 24 and a first microphone 25. The noise signal processing module 24 may be coupled to the first microphone 25 and the air conduction signal processing circuit 22. The first microphone 25 may be configured to collect ambient noise at a specific location (e.g., near a signal source) and output a noise signal. The noise signal processing module 24 may be configured to receive the noise signal and reduce the noise of the air conduction output signal based on the noise signal. The noise-reduced air conduction control signal is output through a power amplifier and an air conduction speaker, achieving the technical effect of active noise reduction in a specific area.

[0156] Figure 6 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 6 The illustrated embodiments and Figure 5 The embodiments shown are basically similar, the difference being that, in Figure 6 In the illustrated embodiment, the first microphone 25 may be configured to acquire sound signals from the area to be noise-reduced (e.g., the area near the air-conducting loudspeaker 32) and output an error signal (e.g., for noise control). The noise signal processing module 24 may be configured to receive the error signal and reduce the noise of the air-conducting output signal based on the error signal to further adjust the air-conducting sound wave signal and achieve noise control in a specific area.

[0157] Figure 7 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 7 The illustrated embodiments and Figure 5 The embodiments shown are basically similar, the difference being that, in Figure 7In the illustrated embodiment, the noise signal processing module 24 is not coupled to the air conduction signal processing circuit 22, but is instead coupled to a separate fourth power amplifier 227. The noise reduction signal generated by the noise signal processing module 24 is amplified by the fourth power amplifier 227 and then outputs a noise-reduced sound through a separate auxiliary air conduction speaker 327. This sound interacts with the sound output from other modules to achieve active noise control in a specific area.

[0158] Figure 8 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 8 The illustrated embodiments and Figure 7 The embodiments shown are basically similar, the difference being that, in Figure 8 In the illustrated embodiment, the signal processing module 2 may further include a noise signal feedback module 27 and a second microphone 28. The second microphone 28 may be configured to acquire the sound signal of the area to be noise-reduced (e.g., the area near the air-conducting loudspeaker 32) and output an error signal (e.g., for noise control). The noise signal feedback module 27 may be coupled to the noise signal processing module 24 and configured to receive the error signal and generate a feedback signal based on the error signal. The noise signal processing module 24 may be configured to generate a noise reduction signal based on the noise signal and the feedback signal to reduce the noise of the air-conducting output signal. The noise reduction signal may be output through an auxiliary air-conducting loudspeaker 327 via a fourth power amplifier 227 to achieve noise control in a specific area. The noise control is implemented by combining feedforward and feedback modes.

[0159] Figure 9A schematic diagram of a sound output device according to an embodiment of this application is shown. The signal processing module 2 may include a subband decomposition module 120, a vibration signal processing module 121, a sound signal processing module 122, a plurality of first power amplifiers 123, and a plurality of second power amplifiers 124. The subband decomposition module 120 may be configured to decompose an initial acoustic signal from a sound source into a plurality of signal components, each located in a different frequency band. The vibration signal processing module 121 may be configured to generate a plurality of bone conduction output signals based on the plurality of signal components, each located in a different frequency band. The sound signal processing module 122 may be configured to generate a plurality of air conduction output signals based on the plurality of signal components, each located in a different frequency band. The plurality of first power amplifiers 123 may be coupled to the vibration signal processing module 121 and configured to amplify the plurality of bone conduction output signals into bone conduction control signals of corresponding frequency bands. Multiple second power amplifiers 124 can be coupled to the sound signal processing module 122 and configured to amplify the multiple air conduction output signals into air conduction control signals of corresponding frequency bands. The sound output device 1 may include multiple vibrating speakers 31 and multiple air conduction speakers 32. The multiple vibrating speakers 31 can be coupled one-to-one with multiple first power amplifiers 123 and generate bone conduction sound waves of corresponding frequency bands based on the bone conduction control signals of corresponding frequency bands. The multiple air conduction speakers 32 can be coupled one-to-one with multiple second power amplifiers 124 and generate air conduction sound waves of corresponding frequency bands based on the air conduction control signals of corresponding frequency bands.

[0160] This embodiment allows for corresponding processing of vibration and sound output requirements based on different frequency bands. The processed sub-band signals can be amplified and output through corresponding vibration speakers or sound output modules to achieve bone conduction and air conduction sound wave output effects at different frequency bands. In some embodiments, the processed sub-band signals can also be synthesized and then amplified and output through one or more corresponding vibration speakers and air conduction speakers to achieve the corresponding effects.

[0161] In an embodiment where the characteristics of the output sound wave are changed by adjusting the output module 3, the structures of the vibrating speaker 31 (i.e., the vibration output module) and the air-conducting speaker 32 (i.e., the sound output module) can be adjusted respectively to make the output bone conduction sound wave (i.e., vibration) and air conduction sound wave (i.e., sound) contain specific frequency components.

[0162] Figure 10 A schematic diagram of a resonant system according to an embodiment of this application is shown. The resonant system can be described using a mass-spring-damped model; a more complex resonant system can be considered as composed of multiple mass-spring-damped systems connected in series and parallel. For example... Figure 2As shown, the motion of this system can be described by the following differential equation:

[0163]

[0164] in, M For system quality, R For system damping, K The system elasticity coefficient, F As the driving force, x Let be the system displacement. Solving the above equation yields the system resonant frequency:

[0165]

[0166] If the frequency bandwidth is calculated at the half-power point, then the system quality factor Q is:

[0167]

[0168] In the presence of multiple resonant systems, the vibration characteristics (amplitude response, phase response, transient response, etc.) of each resonant system can be the same or different. For example, each resonant system can be driven by the same driving force or by different driving forces. In some embodiments, the vibrating speaker 31 or the air-conducting speaker 32 can be a single resonant system or a complex resonant system composed of multiple resonant systems. In one embodiment, the output module 3 may include multiple vibrating speakers 31 and / or multiple air-conducting speakers 32.

[0169] Figure 11 A schematic diagram is shown of two resonant systems driven by the same driving force. In this application, the diagram corresponds to the following situation: the control signal of the signal processing module 2 can generate a driving force to simultaneously drive the vibrating speaker 31 and the air-conducting speaker 32 to generate bone conduction sound and air conduction sound waves, respectively.

[0170] For bone conduction, the frequency and bandwidth can be changed by adjusting the aforementioned parameters. For example, by increasing the mass of the resonant system and decreasing the system's elastic coefficient (e.g., using reeds with a lower elastic coefficient, using materials with a lower Young's modulus in the vibration transmission structure, and reducing the thickness of the vibration transmission structure), its resonant frequency can be adjusted to the mid-to-low frequency range, resulting in mid-to-low frequency vibrations. Conversely, by decreasing the mass of the resonant system and increasing the system's elastic coefficient (e.g., using reeds with a higher elastic coefficient, using materials with a higher Young's modulus in the vibration transmission structure, and increasing the thickness of the vibration transmission structure, such as by adding ribs / stiffeners to the vibration transmission structure), its resonant frequency can be adjusted to the mid-to-high frequency range, resulting in mid-to-high frequency vibrations. For example, the system's quality factor Q can be adjusted by adjusting the system damping, i.e., adjusting the bandwidth of the output vibration. Furthermore, a composite vibration module with multiple resonant systems can be configured, where each resonant system can have its resonant frequency and quality factor Q adjusted independently. By connecting the resonant systems in series or parallel, the center frequency and bandwidth of the composite vibration module's output vibration can be adjusted.

[0171] For air-conducted sound waves, the center frequency can be adjusted by regulating the mass and elastic coefficient of the resonant system, and the bandwidth of the output air-conducted sound wave can be adjusted by regulating the system damping. In some embodiments, one or more acoustic structures (e.g., acoustic cavity, sound guide tube, sound guide hole, tuning hole, tuning mesh, tuning cotton, passive diaphragm, and / or combinations thereof) can be provided to regulate the frequency components of the output air-conducted sound wave. For example, the elastic coefficient of the system can be adjusted by regulating the volume of the acoustic cavity (e.g., if the volume of the acoustic cavity increases, the elastic coefficient of the system decreases; if the volume of the acoustic cavity decreases, the elastic coefficient of the system increases). In some embodiments, a sound guide tube or sound guide hole structure can be provided to regulate the mass and damping of the system (e.g., the longer the length of the sound tube or the smaller the cross-sectional area, the greater the acoustic mass and the smaller the acoustic damping; and vice versa). In some embodiments, acoustic damping materials (tuning holes, mesh, cotton, etc.) can be provided in the path of air-conducted sound wave transmission to regulate the damping of the system. In some embodiments, a passive diaphragm structure can be provided to enhance the output of the low-frequency band of the air-conducted sound wave. In some embodiments, a sound guide tube / port structure can be provided, which can adjust the amplitude and frequency band of the air-conducted sound wave output while also adjusting the phase of the air-conducted sound wave output. In some embodiments, an array of multiple air-conducted loudspeakers can be provided. In some embodiments, the output amplitude, frequency band, and phase of each air-conducted loudspeaker can be adjusted to achieve a sound field with a special spatial distribution in the output of the entire array.

[0172] Users can also adjust the output characteristics of bone conduction sound and / or air conduction sound waves by adjusting the amplitude, frequency, and phase of the control signal. Users can also adjust the output characteristics of bone conduction sound and / or air conduction sound waves by simultaneously adjusting the parameters of the control signal and the resonant system.

[0173] Figure 12 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown. Figure 13 The figure illustrates the phase-frequency characteristics of two different resonant systems driven by the same driving force. As shown, the first and second resonant systems have different resonant frequencies. Correspondingly, the phase-frequency responses of the two resonant systems are also different. In particular, in the frequency band between the two resonant frequencies, the phase difference between the two resonant systems is 180 degrees, i.e., they are out of phase. Therefore, when the two resonant systems output as either a vibrating loudspeaker 31 or an air-conducting loudspeaker 32, the vibrations of the two resonant systems will cancel each other out in this frequency band. As shown in the amplitude-frequency response curve of the total output in the figure, there is a significant gap in the frequency band between the two resonant frequencies.

[0174] Figure 14 A schematic diagram is shown of two resonant systems driven by a pair of opposing driving forces. In this application, the diagram corresponds to the following situation: the control signal of the signal processing module 2 can generate a pair of opposing driving forces to drive the vibrating speaker 31 and the air-conducting speaker 32 respectively, so as to generate bone conduction sound and air conduction sound waves respectively. For example, in a moving coil configuration, the action and reaction forces of the coil force and the magnetic circuit force can be used as the driving force.

[0175] Figure 15 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown. Figure 16 The figure illustrates the phase-frequency characteristics of two different resonant systems driven by the same driving force. As shown, the first and second resonant systems have different resonant frequencies and phase-frequency responses. Specifically, in the frequency band between the two resonant frequencies, the two resonant systems are in phase; however, in other frequency bands, their phase difference is 180 degrees, i.e., they are out of phase. Therefore, when the two resonant systems are used as a vibrating loudspeaker 31 or an air-conducting loudspeaker 32 for output, the vibrations of the two resonant systems will exhibit both additive and destructive behavior in different frequency bands. As shown in the amplitude-frequency response curve of the total output, the two vibrations superimpose and add up in the frequency band between the two resonant frequencies, and superimpose and destructive in other frequency bands. The destructive behavior is particularly significant in the low-frequency range.

[0176] Figure 17 A schematic diagram is shown illustrating two resonant systems driven by different driving forces. In this application, this diagram corresponds to the following scenario: the signal processing module 2 may include a bone conduction signal processing circuit 21 and an air conduction signal processing circuit 22. The bone conduction control signal of the bone conduction signal processing circuit 21 generates a driving force to drive the vibrating speaker 31 to generate bone-conducted sound waves, and the air conduction control signal of the air conduction signal processing circuit 22 generates another driving force to drive the air-conducted speaker 32 to generate air-conducted sound waves. For example, in a moving-coil configuration, different coils can be used to drive the vibrating speaker 31 and the air-conducted speaker 32 respectively.

[0177] In some embodiments, users can achieve various output effects by adjusting the amplitude of each control signal at the same frequency, at different frequencies, and in terms of phase. For example, the magnitude of the driving force can be adjusted by adjusting the amplitude of the corresponding bone conduction control signal or air conduction control signal. Similarly, the driving force can have specific amplitude-frequency characteristics by adjusting the amplitude of the corresponding bone conduction control signal or air conduction control signal at different frequency bands, thereby giving the output bone conduction sound and air conduction sound waves specific amplitude-frequency characteristics. Likewise, the driving force can have specific phase-frequency characteristics by adjusting the phase of the corresponding bone conduction control signal or air conduction control signal at different frequency bands, thereby giving the output bone conduction sound and air conduction sound waves specific phase-frequency characteristics. Through these adjustments, the overall system output can have different amplitude-frequency and phase-frequency characteristics.

[0178] In some embodiments, the magnitude of the driving force converted from the signal can be adjusted by adjusting the electromechanical conversion coefficient of the corresponding output module. For example, in a moving coil configuration, the electromechanical conversion coefficient can be adjusted by adjusting the magnetic field strength, coil impedance, coil wire length, etc.; in a moving iron structure, the electromechanical conversion coefficient can be adjusted by adjusting the magnetic field strength, coil impedance, number of coil turns, coil shape, armature elasticity, etc.

[0179] In some embodiments, the amplitude-frequency and phase-frequency characteristics of the output can be adjusted by regulating the mass, elasticity, and damping of the mechanical vibration module in the output module. For example, the amplitude-frequency and phase-frequency characteristics of the output can be adjusted by regulating the acoustic structure (e.g., acoustic cavity, sound guide tube, tuning hole, tuning mesh, etc.) in the sound output module.

[0180] Figure 18 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown. It is possible to adjust the phase of the output of different resonant systems to achieve a phase enhancement effect within a specific frequency band.

[0181] Figure 19 The amplitude-frequency characteristics of two different resonant systems driven by the same driving force are shown. It is possible to adjust the phase of the outputs of the different resonant systems to achieve a destructive effect within a specific frequency band.

[0182] Figure 20 A schematic diagram of a sound output device provided according to an embodiment of this application is shown.

[0183] The vibrating speaker 31 may include a vibration component 310. The vibration component 310 may be electrically connected to the signal processing module to receive the control signal and generate the bone conduction sound wave based on the control signal. For example, the vibration component 310 may be any element (e.g., a vibrating motor, electromagnetic vibration device, etc.) that converts an electrical signal (e.g., a control signal from the signal processing module 2) into a mechanical vibration signal, wherein the signal conversion method includes, but is not limited to: electromagnetic (moving coil, moving iron, magnetostrictive), piezoelectric, electrostatic, etc. The internal structure of the vibration component 310 may be a single resonant system or a composite resonant system. The vibration component 310 may perform a first mechanical vibration according to the control signal, wherein the first mechanical vibration generates the bone conduction sound wave 5. The vibration component 310 may include a contact portion for conforming to the user's scalp when the user wears the sound output device 1, thereby conducting the bone conduction sound wave 5 through the user's skull to the user's cochlea.

[0184] The air-conducting loudspeaker 32 may include a housing 320. The housing 320 may be coupled to the vibrating assembly 310 and generate air-conducting sound waves 6 based on bone conduction sound waves 5. The housing 320 may be connected to the vibrating assembly 310 via a connector 33. The housing 320 may serve as a secondary resonant system for a first mechanical vibration. On one hand, the housing 320 itself may act as a mechanical system that can generate a second mechanical vibration under the excitation (actuate, actuator) of the first mechanical vibration; on the other hand, after the second mechanical vibration is conducted into the air to form sound (i.e., air-conducting sound wave 6), the internal space of the housing 320 may act as a resonant cavity to amplify the sound. In some embodiments, the response of the housing 320 to the first mechanical vibration can be adjusted by adjusting the connector 33 between the housing 320 and the vibrating assembly 310, that is, the acoustic effect of the housing 320 can be adjusted by adjusting the connector 33. For example, the connector 33 may be rigid. The connector 33 may also be flexible. For example, the connector 33 may be an elastic element, such as a spring or a sheet. Because systems with different elastic coefficients respond differently in amplitude to the same frequency input, the amplitude response of the second mechanical vibration to different frequency excitations can be adjusted by changing the elastic coefficient of connector 33 and / or the elastic coefficient and mass of housing 320. In some embodiments, the sound output device is an earphone. For ease of explanation, Figure 20 The earphone shown is a quadrilateral structure. Of course, the earphone can also have other shapes, such as cylindrical, ordinary earbud shape, and other shapes suitable for the internal structure of the ear canal, etc.

[0185] In conclusion, Figure 2The illustrated sound output device can directly output bone conduction sound waves when the vibration component 310 is working, such as by transmitting bone conduction sound to the human body through contact with the skin. Simultaneously, the first mechanical vibration generated by the vibration component 310 is transmitted to the housing 320 through a connector, causing the housing 320 to also vibrate, i.e., a second mechanical vibration. This second vibration can act as a sound source for air conduction sound waves, radiating sound to the outside, thus enabling a single device to simultaneously output bone conduction sound waves and air conduction sound waves. Furthermore, the bone conduction sound waves and air conduction sound waves output by the sound output device originate from the same driving source; therefore, the output bone conduction sound waves (or the first mechanical vibration) and air conduction sound waves (or the second mechanical vibration) are correlated.

[0186] Figure 21 It shows Figure 20 The amplitude-frequency characteristics of the bone-conducted sound waves and air-conducted sound waves in the structure shown are illustrated. As can be seen from the figure, the spectrum of the output bone-conducted sound waves is related to the spectrum of the air-conducted sound waves, and the positions of the resonant peaks correspond to each other. However, since the bone-conducted sound waves are generated by the vibrating loudspeaker 31, while the air-conducted sound waves are generated by the secondary resonant system subjected to the first mechanical vibration, their amplitude responses to the same excitation signal are different. Figure 21 As shown in the amplitude-frequency characteristics of bone-conducted and air-conducted sound waves, the bone-conducted sound waves output by the sound output device have a greater amplitude than the air-conducted sound waves in the frequency range of approximately 0Hz-23Hz and above approximately 1300Hz. In the frequency range of 23Hz-1300Hz, the amplitude of the air-conducted sound waves output by the sound output device is greater than that of the bone-conducted sound waves.

[0187] Since the sounds of human voices and musical instruments are primarily concentrated between 20Hz and 5kHz, this target frequency range can be divided into three frequency bands: low frequency, mid frequency, and high frequency. For example, as mentioned earlier, low frequency can refer to the band roughly from 20Hz to 150Hz, mid frequency to 150Hz to 5kHz, high frequency to 5kHz to 20kHz, low-mid frequency to 150Hz to 500Hz, and mid-high frequency to 500Hz to 5kHz. Those skilled in the art will understand that the above frequency band distinctions are merely an example to provide a general range. The definitions of these frequency bands can vary depending on different industries, application scenarios, and classification standards. For example, in other application scenarios, low frequency refers to the frequency band roughly from 20Hz to 80Hz, mid-low frequency can refer to the frequency band roughly from 80Hz to 160Hz, mid frequency can refer to the frequency band roughly from 160Hz to 1280Hz, mid-high frequency can refer to the frequency band roughly from 1280Hz to 2560Hz, and high frequency can refer to the frequency band roughly from 2560Hz to 120KHz.

[0188] For the same control signal from signal processing module 2, air-conducted sound waves have a larger amplitude output in the low-frequency range, while bone-conducted sound waves have a larger amplitude output in the high-frequency range. In the mid-frequency range, with approximately 1.3Hz as the boundary, the amplitude of the air-conducted sound waves output by the sound output device can be greater than or less than the amplitude of the bone-conducted sound waves. Of course, the above description of sound wave output is limited to... Figure 20 The sound output device is shown. Changing the design of the sound output device can alter the distribution of its bone conduction and air conduction sound wave outputs.

[0189] Therefore, by adjusting the shape, position, and stiffness of different components of the sound output device, the sound output device can adjust the output amplitude of bone conduction sound waves and air conduction sound waves in different frequency bands within the target frequency range, thereby creating different output sound effects. For example, for bone conduction headphones, air conduction sound waves can supplement bone conduction sound waves, enhancing the user's overall acoustic experience.

[0190] In the following description, this application will introduce different design schemes of the sound output device.

[0191] Figure 22 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 22 Zhongyu Figure 20 Elements with the same reference number have the same or similar structure, and will not be elaborated further here.

[0192] In this embodiment, the housing 320 further includes a sound outlet 322. Air-conducted sound waves 6 are output from inside the housing 320 to outside the housing 320 through the sound outlet 322. The air-conducted loudspeaker 32 also includes a tuning mesh 323 covering the sound outlet 322. The tuning mesh 323 can be used to adjust the frequency of the air-conducted sound waves 6. In some embodiments, the housing 320 may define a cavity 319 to accommodate a portion of the vibrating assembly 310. In some embodiments, the sound outlet 322 may be a tuning hole that directs air-conducted sound waves generated inside the housing 320 by the vibration of the first mechanical vibration of the vibrating assembly 310 to the outside of the housing 320, interacting with air-conducted sound waves generated by the vibration of the housing 320 itself (i.e., the second mechanical vibration) to form a combined air-conducted sound wave output. In some embodiments, the housing 320 may include a plurality of sound outlets 322. The user can adjust the air-conducted sound wave output by adjusting the number, position, size, and / or shape of the sound outlets 322.

[0193] Figure 23 Schematic diagrams showing different positions of the sound outlet 322 are provided. In some embodiments, the sound outlet 322 may be oriented away from the user's temple when the sound output device is located at the user's temple. In some embodiments, the sound outlet 322 may be oriented towards the user's external auditory canal when the sound output device is located at the user's temple. In some embodiments, the sound outlet 322 may be oriented towards the back of the user's ear when the sound output device is located at the user's temple. In some embodiments, the sound outlet 322 may be oriented towards the top of the user's head when the sound output device is located at the user's temple.

[0194] Figure 24 The figure illustrates the amplitude-frequency characteristics of air-conducted sound waves at different vent positions. As shown, assuming the sound output device is positioned slightly above and in front of the ear, with the vibrating speaker close to the head to output vibrations, the air-conducted sound waves transmitted to the ear differ depending on the vent's location on the housing. Compared to the absence of a vent, placing the vent on the back of the housing (position P1) increases the high-frequency and decreases the mid-frequency air-conducted sound waves transmitted to the ear. Placing the vent on the side of the housing towards the ear (position P2) significantly increases both the mid- and high-frequency components of the air-conducted sound waves transmitted to the ear, improving overall acoustic volume and voice communication quality. Placing the vent on the side of the housing towards the back of the ear (position P3) slightly increases the mid- and high-frequency components of the air-conducted sound waves transmitted to the ear, but the increase is not as significant as when the vent is directly pointed towards the ear. Placing the vent on the side of the housing towards the top of the head (position P4) only slightly increases the volume of the air-conducted sound waves transmitted to the ear, with little effect. Furthermore, the location of the sound outlet is not limited to the single location mentioned above, but can also be a combination of multiple locations, and the number of sound outlets can be one or more.

[0195] Therefore, by adjusting the position of the sound output port on the housing 320, the amplitude-frequency characteristics of the air-conducted sound waves of the sound output device can be adjusted. This, in turn, allows for changes in the design of the sound output device, altering the distribution of its bone conduction and air conduction sound wave outputs. For example, in bone conduction headphones, air conduction sound waves can supplement bone conduction sound waves, enhancing the user's overall acoustic experience.

[0196] Figure 25 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 25 Zhongyu Figure 20 Elements with the same reference number have the same or similar structure, and will not be elaborated further here.

[0197] The vibrating speaker 131 may include a vibration assembly 1310. The vibration assembly 1310 may be electrically connected to the signal processing module to receive the control signal and generate bone conduction sound waves 5 based on the control signal. The vibration assembly 1310 may perform a first mechanical vibration according to the control signal, wherein the first mechanical vibration generates bone conduction sound waves 5.

[0198] The vibration assembly 1310 may further include a magnetic circuit system 1311, a diaphragm 1312, and a coil 1313. The magnetic circuit system 1311 may be configured to generate a first magnetic field. Specifically, the magnetic circuit system 1311 may include a magnetic gap 1317 and be configured to generate the first magnetic field within the magnetic gap 1317. The diaphragm 1312 may be connected to the housing 1320 of the air-conducting speaker 32. The coil 1313 may be mechanically connected to the diaphragm 1312 and electrically connected to the signal processing module. The coil 1313 may be placed within the magnetic gap 1317. The coil 1313 receives the control signal and generates a second magnetic field based on the control signal. Due to the interaction between the first magnetic field and the second magnetic field, the coil 1313 is subjected to a force F, thereby exciting the diaphragm 1312 to vibrate, generating bone conduction sound waves 5. The diaphragm 1312 may include a sound outlet 1314.

[0199] The air-conducting loudspeaker 32 may include a housing 1320, a diaphragm 1321, a first tuning grille 1322, and a second tuning grille 1323. The housing 1320 may be connected to a diaphragm 1312 to define a cavity 1319 housing the magnetic circuit system 1311 and the diaphragm 1321. The housing 1320 may include a tuning port 1324. The diaphragm 1321 may be connected to the magnetic circuit system 1311 and the housing 1320. Due to the interaction between the first magnetic field and the second magnetic field, the magnetic circuit system 1311 will also experience a corresponding reaction force -F, exciting the diaphragm 1321 to vibrate and generate air-conducted sound waves 6. The air-conducted sound waves 6 can be output from the interior of the housing 1320 (i.e., the cavity 1319) to the exterior of the housing 1320 through the sound outlet 1314. The first tuning grille 1322 may cover the sound outlet 1314 to adjust the frequency of the air-conducted sound waves 6. The second tuning mesh 1323 can cover the tuning hole 1324 to adjust the pressure inside the housing 1320, thereby adjusting the frequency of the air-conducted sound wave 6. In some embodiments, there can be multiple sound outlet holes 1314. In some embodiments, there can be multiple tuning holes 1324.

[0200] The output characteristics of the bone conduction sound wave 5 can be adjusted by regulating the stiffness of the vibrating plate 1312 and / or the housing 1320 (e.g., structural dimensions, material elastic modulus, special mechanical structures such as ribs and stiffeners). The output characteristics of the air conduction sound wave 6 can be adjusted by regulating the shape, elastic coefficient, and damping of the diaphragm 1321. The output characteristics of the air conduction sound wave 6 can be adjusted by regulating the number, position, size, and / or shape of the sound outlet 1314 and / or the tuning port 1324.

[0201] Figure 26 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 26 The illustrated embodiments and Figure 25 The embodiments shown are similar, except that, in Figure 26 In the embodiment shown, the sound outlet 1314 is located on the housing 1320, rather than on the vibrating plate 1312.

[0202] Figure 27The amplitude-frequency characteristics of bone conduction sound waves and air conduction sound waves are illustrated. As shown in the figure, in some embodiments, the resonant frequency of the output bone conduction sound waves can be raised to a higher frequency by increasing the stiffness of the vibrating plate and the housing, while the resonant frequency of the output air conduction sound waves can be controlled to a lower frequency by adjusting the magnetic circuit mass, the diaphragm elastic coefficient, and setting a tuning port. Bone conduction sound waves can produce hearing through bone conduction, while air conduction sound waves can produce hearing through traditional air conduction. Bone conduction sound waves and air conduction sound waves of different frequency bands can complement each other, enhancing the user's listening experience. This allows the user to hear a sufficient amount of low frequency without feeling strong low-frequency vibrations, while bone conduction sound waves also enhance the user's perception of high frequencies.

[0203] Figure 28 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 28 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 28 In the illustrated embodiment, the magnetic circuit system 1311 is connected to the housing 1320 via a first elastic element 1315. By connecting the magnetic circuit system 1311 and the housing 1320 with the first elastic element 1315, a portion of the vibration generated by the magnetic circuit system 1311 is output to the housing 1320, where it combines with the vibration of the vibrating plate 1312 to form the output of bone conduction sound waves. Another portion of the vibration generated by the magnetic circuit system 1311 excites the diaphragm 1321 to generate the output of air conduction sound waves. By adjusting the elastic coefficient of the first elastic element 1315, at least two resonant peaks can be generated within the audible range of the human ear, achieving a wider frequency range for bone conduction sound wave output.

[0204] Figure 29 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 29 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 29 In the illustrated embodiment, the magnetic circuit system 1311 is connected to the vibrating plate 1312 via a first elastic element 1315, and the vibrating plate 1312 is connected to the housing 1320 via a second elastic element 1316. In this embodiment, the magnetic circuit system 1311 is not connected to the housing 1320. In some embodiments, the vibrating plate 1312 may have an "I"-shaped cross-section, with the upper part of the vibrating plate 1312 located outside the cavity 1319 and the lower part of the vibrating plate 1312 located inside the cavity 1319. In some embodiments, the magnetic circuit system 1311 may be connected to the middle of the vibrating plate 1312 via the elastic element 1315. By adjusting the elastic coefficients of the first elastic element 1315 and / or the second elastic element 1316, at least three resonant peaks can be generated within the audible range of the human ear, achieving a wider frequency response for bone conduction sound waves.

[0205] Figure 30 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 30 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 30 In the illustrated embodiment, the vibration assembly 1310 may further include a magnetic circuit system 1311 and a vibrating plate 1312 rigidly connected to each other. The vibrating plate 1312 is connected to the housing 1320 via a second elastic element 1316. The air-conducting loudspeaker 32 may include a coil 1313 and a diaphragm 1321 connected to each other. In this embodiment, the coil 1313 is not connected to the vibrating plate 1312. In this embodiment, because the system formed by the coil 1313 and the diaphragm 1321 has a relatively small mass, a wide-bandwidth air-conducted sound wave output can be achieved. Furthermore, because the magnetic circuit system 1311, the vibrating plate 1312, and the second elastic element 1316 have a relatively large mass, low-frequency bone conduction sound wave output can be achieved by adjusting the elastic coefficient of the second elastic element 1316.

[0206] Figure 31 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 31 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 31 In the illustrated embodiment, the first tuning screen 1322 is not provided, and the air-conducting speaker 32 may include a sound guide tube 1326. The sound guide tube 1326 may be connected to the housing 1320 and communicate with the sound outlet 1314, and is configured to adjust the phase of the air-conducting sound wave 6 and / or change the propagation direction of the air-conducting sound wave 6, thereby adjusting the output quality of the air-conducting sound wave 6 and enhancing the output effect of the air-conducting sound wave 6. For example, by guiding the air-conducting sound wave 6 to the ear through the sound guide tube 1326, the volume of the air-conducting sound wave heard by the human ear can be increased.

[0207] Figure 32 A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 32 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 32 In the illustrated embodiment, the second tuning screen 1323 is not provided, and the air-conducting loudspeaker 32 may include a sound guide tube 1326, which can be connected to the housing 1320 and communicate with the tuning hole 1324. By providing the sound guide tube 1326 at a non-sound outlet (such as the tuning hole 1324), the phase of the air-conducting sound wave 6 can be adjusted, and the air-conducting sound wave 7 led out through the sound guide tube 1326 is superimposed with the air-conducting sound wave 6 output from the sound outlet 1314, thereby achieving the control of the final air-conducting sound wave.

[0208] Figure 33A schematic diagram of a sound output device provided according to an embodiment of this application is shown. Figure 33 The illustrated embodiments and Figure 26 The embodiments shown are similar, except that, in Figure 33 In the illustrated embodiment, the second tuning grille 1323 is not provided, and the air-conducting loudspeaker 32 may include a passive diaphragm 1327, which may be mechanically connected to the tuning port 1324. When the diaphragm 1312 vibrates to generate bone conduction sound waves, the air pressure inside the housing 1320 may change accordingly and / or vibrate. By covering the passive diaphragm 1327 at a non-sound outlet (such as the tuning port 1324), the vibration of the passive diaphragm 1327 due to the change in air pressure difference inside and outside the housing 1320 can also radiate secondary air-conducted sound waves 7 to the outside (i.e., the bone conduction sound waves cause changes in air pressure inside the housing, thereby exciting the passive diaphragm to vibrate and generate secondary air-conducted sound waves 7). By superimposing the secondary air-conducted sound waves 7 with the air-conducted sound waves 6 output from the sound outlet 1314, the final air-conducted sound waves can be controlled.

[0209] Figure 34 A schematic diagram of a sound output device provided according to an embodiment of this application is shown.

[0210] The vibrating loudspeaker 31 may include a first vibrating component 2310 and an elastic element 2318. The first vibrating component 2310 may be electrically connected to the bone conduction signal processing circuit 21 to receive the bone conduction control signal and generate bone conduction sound waves 5 based on the bone conduction control signal. The first vibrating component 2310 may include a magnetic circuit system 2311, a vibrating plate 2312, and a first coil 2313. The magnetic circuit system 2311 may be connected to the housing 2320 of the air conduction loudspeaker 32 via the elastic element 2318. The magnetic circuit system 2311 may be configured to generate a first magnetic field. Specifically, the magnetic circuit system 2311 may include a first magnetic gap 2317 and a second magnetic gap 2328 and be configured to generate the first magnetic field in the first magnetic gap 2317 and the second magnetic gap 2328. The vibrating plate 2312 may be connected to the housing 2320. The first coil 2313 may be mechanically connected to the vibrating plate 2312 and electrically connected to the bone conduction signal processing circuit 21. The first coil 2313 may be placed in the first magnetic gap 2317. The first coil 2313 receives the bone conduction control signal and generates a second magnetic field based on the bone conduction control signal. Due to the interaction between the first magnetic field and the second magnetic field, the first coil 2313 will be subjected to a force F1, thereby exciting the vibrating plate 2312 to vibrate and generate bone conduction sound waves 5. The vibrating plate 2312 may include a sound outlet 2314.

[0211] The air-conducting loudspeaker 32 may include a housing 2320, a second vibrating assembly 2316, a first tuning grille 2322, and a second tuning grille 2323. The housing 2320 may be connected to a diaphragm 2312 to define a cavity 2319 accommodating a magnetic circuit system 2311 and a diaphragm 2321. The second vibrating assembly 2316 may be electrically connected to an air-conducting signal processing circuit 22 to receive the air-conducting control signal and generate air-conducted sound waves 6 based on the air-conducting control signal. The second vibrating assembly 2316 may include a diaphragm 2321 and a second coil 2327. The diaphragm 2321 may be connected to the housing 2320 and to the second coil 2327. The second coil 2327 may be electrically connected to the air-conducting signal processing circuit 22. The second coil 2327 may be placed in a second magnetic gap 2328. The second coil 2327 receives the air conduction control signal and generates a third magnetic field based on the signal. Due to the interaction between the first and third magnetic fields, the second coil 2327 experiences a force F2, thereby exciting the diaphragm 2321 to vibrate and generate air-conducted sound wave 6. The air-conducted sound wave 6 can be output from the interior of the housing 2320 (i.e., cavity 2319) to the exterior of the housing 2320 through the sound outlet 2314. A first tuning mesh 2322 can cover the sound outlet 2314 to adjust the frequency of the air-conducted sound wave 6. A second tuning mesh 2323 can cover the tuning hole 2324 to adjust the pressure inside the housing 2320, thereby adjusting the frequency of the air-conducted sound wave 6. In some embodiments, there can be multiple sound outlets 2314. In some embodiments, there can be multiple tuning holes 2324.

[0212] In summary, by adjusting the position of the sound output port on the housing, adjusting the stiffness of the vibrating plate and housing, and modifying the magnetic circuit mass, diaphragm elastic coefficient, and setting tuning holes, the frequency range and amplitude of the air-conducted and bone-conducted sound waves output by the sound output device can be adjusted. Bone-conducted sound waves produce hearing through bone conduction, while air-conducted sound waves produce hearing through traditional air conduction. The different frequency bands of bone-conducted and air-conducted sound waves can complement each other, enhancing the user's overall acoustic experience.

[0213] for example Figure 35 An amplitude-frequency characteristic of a sound output device according to an embodiment of this application is shown. As shown in the figure, for example, bone conduction sound waves and air conduction sound waves contain different frequency components, which can achieve the technical effect of complementary frequency bands.

[0214] In some embodiments, air-conducted sound waves contain low-to-mid frequency components, while bone-conducted sound waves contain mid-to-high frequency components. Users can hear low-to-mid frequency sounds through air conduction and mid-to-high frequency sounds through bone conduction. By supplementing low frequencies with air-conducted sound waves, good sound quality (especially low frequencies) can be maintained while avoiding the strong vibrations caused by low-frequency bone-conducted sound waves.

[0215] In some embodiments, the sound output device is configured to output sound waves within a target frequency range, wherein the bone conduction sound waves include the high-frequency portion of the target frequency range and the air conduction sound waves include the low-frequency portion of the target frequency range.

[0216] In some embodiments, the bone-conducted sound waves may include the mid-frequency portion of the target frequency range, and the air-conducted sound waves may include the mid-frequency portion of the target frequency range.

[0217] In some embodiments, air-conducted sound waves contain mid-to-high frequency components, and bone-conducted sound waves contain mid-to-low frequency components. Since users are more sensitive to mid-to-high frequency sounds auditorily, and typically more sensitive to low-frequency mechanical vibrations tactilely, the above output mode can provide users with simultaneous auditory and tactile cues, achieving dual-mode cues / alerts.

[0218] In some embodiments, the vibration speaker is also configured to generate low-frequency vibration waves that are perceptible to the user's skin.

[0219] In some embodiments, the user can adjust the parameters of the corresponding signal processing module (e.g., bone conduction signal processing module, air conduction signal processing module) and / or output module (e.g., vibration speaker, air conduction speaker) to make the air conduction sound wave and bone conduction sound wave contain the desired frequency band components respectively.

[0220] Figure 36 Another amplitude-frequency characteristic of the sound output device provided according to an embodiment of this application is shown. As shown in the figure, for example, bone conduction sound waves and air conduction sound waves contain the same frequency components, which can achieve the technical effect of enhancing a certain frequency band.

[0221] In some embodiments, bone conduction sound waves (vibration) and air conduction sound waves (sound) contain the same frequency components in the low and mid-frequency range. Their combined effect allows for a lower low and mid-frequency output than a higher mid and high-frequency output. The human ear's hearing threshold / equal loudness curve exhibits a high low and mid-frequency response and a low mid and high-frequency response, meaning the human ear is more sensitive to mid and high frequencies. The aforementioned output mode, where low and mid frequencies are higher than mid and high frequencies, effectively compensates for the attenuation of low and mid-frequency sounds caused by the human ear's hearing threshold, resulting in a more balanced sound across all frequency bands.

[0222] In some embodiments, the bone conduction sound wave may include the low-frequency portion of the target frequency range, and the bone conduction sound wave may be superimposed with the air conduction sound wave, such that the output of the sound output device at the low to mid-frequency range is greater than its output at the mid to high-frequency range.

[0223] In some embodiments, air-conducted sound waves contain mid-to-low frequency components, while bone-conducted sound waves contain components with a wider frequency range than air-conducted sound waves. This enables bone conduction hearing, enhances mid-to-low frequency components, improves sound quality, and ensures comfort and safety without increasing strong mechanical vibrations in the mid-to-low frequencies.

[0224] In some embodiments, bone conduction sound waves contain mid-to-low frequency components, while air conduction sound waves contain components with a wider frequency range than bone conduction sound waves. By adding appropriate mid-to-low frequency vibrations, users can obtain tactile sensations while experiencing auditory sensations, thereby enhancing the listening experience.

[0225] In some embodiments, the air-conducted sound wave includes a mid-frequency portion of the target frequency range, and the bone-conducted sound wave includes a low-frequency portion and a mid-frequency portion of the target frequency range, wherein the bone-conducted sound wave covers a wider frequency range than the air-conducted sound wave.

[0226] Figure 37 Another amplitude-frequency characteristic of the sound output device provided according to an embodiment of this application is illustrated. As shown, for example, air-conducted sound waves and bone-conducted sound waves contain the same frequency components in the mid-to-high frequency range. These same frequency components can be noise-canceling frequency sound waves; that is, when the same frequency components of the air-conducted sound waves and bone-conducted sound waves are out of phase, attenuation of mid-to-high frequency sound leakage can be achieved. Furthermore, when the same frequency components of the air-conducted sound waves and bone-conducted sound waves are in phase, enhancement of mid-to-high frequency sound leakage can be achieved.

[0227] In some embodiments, the air-conducting sound wave contains mid-to-high frequency components, and the bone-conducting sound wave contains components with a wider frequency range than the air-conducting sound wave. The air-conducting sound wave can be used as an anti-phase destructive sound source to cancel out the mid-to-high frequency sound leakage caused by the bone-conducting device.

[0228] In some embodiments, the air-conducted sound waves may share a common noise-canceling frequency with the bone-conducted sound waves, the air-conducted sound waves may include the mid-frequency and high-frequency portions of the target frequency range, and the bone-conducted sound waves may cover a wider frequency range than the air-conducted sound waves.

[0229] Figure 38 Another amplitude-frequency characteristic of the sound output device provided according to an embodiment of this application is shown.

[0230] In some embodiments, bone conduction acoustic waves contain mid-to-high frequency components, while air conduction acoustic waves contain a wider frequency range than bone conduction acoustic waves, which can enhance mid-to-high frequency sound. In particular, for a specific air conduction open binaural scheme, bone conduction acoustic waves can be used to compensate for the deficiencies of air conduction acoustic waves in the mid-to-high frequency range (e.g., deficiencies caused by acoustic structure, or mid-to-high frequency deficiencies caused by vibration segmentation).

[0231] In some embodiments, the air-conducted sound wave may include a mid-frequency portion and a high-frequency portion of the target frequency range, the bone-conducted sound wave may include a mid-frequency portion of the target frequency range, and the air-conducted sound wave may cover a wider frequency range than the bone-conducted sound wave.

[0232] In some embodiments, the output of sound (air conduction) and vibration (bone conduction) can be accomplished by their respective independent modules / devices. In addition to the corresponding signal processing and the characteristics of the individual module / device itself, the location of the module / device and the interaction / influence between the modules / devices will also affect the final output effect.

[0233] For sound output modules / devices (e.g., air-conducting loudspeakers), the boundary conditions surrounding their location affect the output performance. For example, a sound output module placed near a person's head will be affected by the shape of the head, facial features, earlobes, and other boundary elements.

[0234] Figure 39 The figure illustrates the amplitude-frequency characteristics of a sound output module provided according to an embodiment of this application when positioned on the head at different locations. As shown, the sound output from the sound output module placed near the head is affected differently by the aforementioned boundaries, resulting in different sounds transmitted to the ear. The sound output from the sound source is relatively flat across all frequency bands, but when placed at different head positions, the sound transmitted to the ear changes differently due to the influence of different boundaries along the sound transmission path, causing peaks and valleys in the mid-to-high frequency range.

[0235] In some embodiments, when the sound output device is worn by a user, one or more air-conducting speakers of the sound output device may be located behind the user's head, on top of the head, on the forehead, on the bridge of the nose, behind the ear, on top of the ear, and / or in front of the ear.

[0236] Due to the influence of different boundaries, the sound that can diffuse into the surrounding space, the sound field established in the surrounding space, and the sound leakage will also be different.

[0237] Figure 40 The amplitude-frequency characteristics of sound leakage of a sound output module provided according to an embodiment of this application are shown. As shown in the figure, in the sound leakage spectrum relative to the sound source under unobstructed free field conditions, placing the sound source at different positions on the head will affect the sound leakage propagating to the outside world by different boundaries, thereby causing the frequency spectrum of the sound leakage to change. The frequency band in which this change occurs is mainly in the mid-to-high frequency range.

[0238] For vibration output modules / devices (e.g., vibrating speakers), since they need to contact the user to transmit vibration, the different contact positions between the module / device and the user will bring different vibration experiences to the user. The vibration output by the module / device is affected by the mechanical properties of the tissue at its contact position, as well as by the pressure and pressure distribution of the contact surface, and also by the direction of vibration.

[0239] Some vibration output modules / devices output sound into the surrounding space when they are working, and this output sound is also affected by the surrounding boundary conditions.

[0240] Figure 41 The amplitude-frequency characteristics of sound leakage of the vibration output module provided according to an embodiment of this application are illustrated. Taking a vibration output module / device attached to different positions on a person's head as an example, as shown in the figure, the sound diffused into the surrounding space / the sound field established in the surrounding space / sound leakage will also be different at different positions. Compared with the sound leakage of the vibration output module / device under the condition of no attachment in a free field, when the vibration output module / device is attached to different positions on a person's head, the sound leakage changes significantly in the mid and high frequency ranges, that is, the sound leakage in the mid frequency range decreases and the sound leakage in the high frequency range increases.

[0241] In some embodiments, when the sound output device is worn by a user, one or more vibrating speakers of the sound output device may be located on the user's mastoid process, back of the head, top of the head, forehead, bridge of the nose, behind the ear, top of the ear, and / or in front of the ear.

[0242] The outputs of each module / device can interact / influence each other. The user's final experience is the result of the combined effect of each module / device, and the relevant factors between each module / device will affect their interaction.

[0243] The spacing between modules / devices can affect the amplitude and phase of the output of one module / device reaching another module / device, and also affect the amplitude and phase of the output of each module / device reaching a certain point in space, ultimately affecting the overall output effect.

[0244] Figure 42 A schematic diagram showing the positional relationship between two dipole sound sources provided according to an embodiment of this application is shown. Figure 43 The figure illustrates the amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application at different distances. As shown, taking two dipole sound sources with a certain distance between them as an example, their sound source amplitudes are the same, but their phases are opposite. When the distance between them changes, the sound energy / volume output to the outside will change. Under this condition, as the distance between the two sound sources increases, the sound volume output to the outside will increase.

[0245] The amplitude of each module / device directly affects the amplitude of its output at a certain point in space, thus influencing the interaction between the outputs of each module / device. Furthermore, since the outputs of each module / device create a specific sound field distribution in space, the impact of the module / device amplitude will vary at different locations in space.

[0246] Figure 44 A schematic diagram showing the positional relationship between two dipole sound sources provided according to an embodiment of this application is shown. Figure 45 The normal amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application are shown at different amplitude ratios. Figure 46 The figure illustrates the axial amplitude-frequency characteristics of two dipole sound sources provided according to embodiments of this application at different amplitude ratios. As shown, taking two dipole sound sources with a fixed spacing, a fixed relative angle, and opposite phase as an example, when the amplitude of one sound source changes relative to the amplitude of the other, the resulting sound field in space changes. Specifically, at the perpendicular bisector (normal) of the line connecting the two sound sources, as the amplitude ratio of one sound source to the other increases, the sound pressure level at that location also increases. At the extension line (axial) of the line connecting the two sound sources, as the amplitude ratio of one sound source to the other increases, the sound pressure level at that location decreases.

[0247] The phase of each module / device can directly affect the phase of its output to a certain point in space, thereby affecting the interaction results of the outputs of each module / device.

[0248] Figure 47 A schematic diagram showing the positional relationship between two monopole sound sources provided according to an embodiment of this application is shown. Figure 48 The figure illustrates the amplitude-frequency characteristics of two monopole sound sources provided according to embodiments of this application under different phase differences. As shown in the figure, taking two monopole sound sources with a fixed spacing and the same amplitude as an example, when the phase difference between the two sound sources changes, the energy / volume output to the outside world will change. When the phase difference between the two gradually approaches 180°, the output energy / volume gradually decreases (the sound pressure level decreases). At the same time, the decrease in low frequency is greater than the decrease in high frequency.

[0249] Some modules / devices have directional outputs or anisotropic spatial distribution of outputs. Therefore, the spatial position and orientation of modules / devices with this characteristic will affect the sound field distribution they establish in space, and thus affect the overall output effect.

[0250] Figure 49 A schematic diagram showing the positional relationship between two dipole sound sources provided according to an embodiment of this application is shown. Figure 50The relationship between the normal angle and amplitude of two dipole sound sources provided according to embodiments of this application at different frequencies is shown. Figure 51 The figure illustrates the relationship between the axial angle and amplitude of two dipole sound sources provided according to embodiments of this application at different frequencies. As shown, taking two dipole sound sources with a fixed distance and opposite phase as an example, the output sound differs when the polar axis directions of the two sources are different. The angle formed between the polar axis direction and the line connecting the two sound sources is taken as the rotation angle, and the rotation angles of the two sound sources are complementary. With the change of rotation angle, the sound pressure level / volume varies at different locations in space. At the perpendicular bisector (normal) of the line connecting the two sound sources, the sound pressure level has a maximum value at approximately 80° of rotation and a minimum value at approximately 165°. At the extension line (axial) of the line connecting the two sound sources, the sound pressure level has a minimum value at approximately 90° of rotation.

[0251] Each module / device has a specific spatial arrangement, which will also produce a sound field with a special distribution.

[0252] Figure 52 A schematic diagram showing the positional relationship of five monopole sound sources provided according to an embodiment of this application is shown. Figure 53 The figure illustrates the amplitude distribution of five monopole sound sources provided according to embodiments of this application at different frequencies. As shown, taking five monopole sound sources arranged at equal intervals according to a planar quadratic curve as an example, they can generate a focal point of the sound field near the focus of the quadratic curve, where the sound pressure level / volume reaches its maximum. This sound focusing effect varies for different frequency signals; the focusing effect becomes more pronounced as the frequency increases. This focusing effect also gives the output of the entire module spatial directivity.

[0253] When each module / device has a specific spatial arrangement, the output phase difference between each module / device can affect the shape of the entire sound field and the spatial directivity of the entire module output.

[0254] Figure 54 A schematic diagram showing the positional relationship of five monopole sound sources provided according to an embodiment of this application is shown. Figure 55 The figure illustrates the amplitude distribution of five monopole sound sources according to embodiments of this application under different phase differences. As shown, the five monopole sound sources are arranged at equal intervals along a quadratic curve, and the output phase of each sound source increases (or decreases) by an angle θ sequentially along the quadratic curve. When the angle θ changes, the focal position of the sound field changes; as the angle θ increases from 0° to 90°, the focal position of the sound field moves in the direction of phase lag.

[0255] When each module / device has a specific spatial arrangement, the output amplitude between each module / device will affect the shape of the entire sound field and the spatial directivity of the entire module output.

[0256] Figure 56 A schematic diagram showing the positional relationship of five monopole sound sources provided according to an embodiment of this application is shown. Figure 57 The figure illustrates the amplitude distribution of five monopole sound sources according to embodiments of this application at different amplitude ratios. As shown, the five monopole sound sources are arranged at equal intervals along a quadratic curve, and the output amplitude of each sound source increases (or decreases) proportionally with a ratio 'a' along the quadratic curve. When the ratio 'a' changes, the sound focusing effect changes; the smaller the ratio 'a' (the greater the amplitude difference between modules / devices), the worse the focusing effect, and the focal point shifts towards the sound source with the larger amplitude. Simultaneously, when the amplitude ratio 'a' changes, the directional direction of the entire module output changes, deflecting towards the sound source with the larger amplitude.

[0257] In some embodiments, the sound output device may include a plurality of air-conducting loudspeakers arranged at equal intervals along a quadratic curve. In some embodiments, the sound output device may include a plurality of vibrating loudspeakers arranged at equal intervals along a quadratic curve.

[0258] Figure 58 Various combinations of bone conduction sound waves and air conduction sound waves provided according to embodiments of this application are illustrated.

[0259] Vibration and sound can affect a person's sense of touch and hearing respectively, producing a more intense and unique sensation compared to touch or hearing alone. For example... Figure 58 As shown in (a), this is a working mode that alternates between vibration and sound output, which can enhance the function of prompting or alarming. Compared to vibration-only or sound-only prompts, this alternating vibration and sound output mode can stimulate human tactile and auditory sensations, achieving a strong prompting effect. In some embodiments, the vibration is in the 1Hz-500Hz frequency band, and the sound is in the 1kHz-5kHz frequency band. Figure 58 As shown in (b), this is a working mode that outputs vibration and sound simultaneously, which can simultaneously stimulate the user's tactile and auditory senses and has a strong cues effect. It can also be set so that the vibration changes with the sound (or the sound changes with the vibration), enhancing the user's experience through touch and hearing. For example, in games or movies, explosions are accompanied by corresponding vibration signals to enhance the user's experience. In sound source localization scenarios, the vibration mode changes (e.g., changes the vibration amplitude or frequency) as the sound source localization changes to provide cues; in VR / AR devices, the vibration mode changes with changes in vision and hearing, enhancing immersion through the fusion of vision, hearing, and touch. Since vibration and sound trigger different receptors in the user, the two senses (touch and hearing) are clearly distinguishable, and can be used to represent different states to achieve information transmission. Figure 58As shown in (c), the sound state (stimulating hearing) can be represented as state "0", and the vibration state (stimulating touch) can be represented as state "1". Intermittent output of sound or vibration can form a string of binary information, realizing the transmission of information. Figure 58 As shown in (d), the sound state and vibration state can be represented by "." and "—" in Morse code, respectively, which enables information to be transmitted through Morse coding.

[0260] Figure 59 The location of the vibration speaker and air conduction speaker provided according to embodiments of this application at the user's head is shown. Figure 60 The amplitude-frequency characteristics of the leakage sound of the vibrating loudspeaker provided according to an embodiment of this application are shown. Figure 61 The amplitude-frequency characteristics of sound leakage from a vibration speaker provided according to an embodiment of this application are shown at different power levels. As shown, the vibration output module (e.g., the vibration speaker) outputs sound by attaching to the human head or through bone conduction. However, because the vibration output module causes the surrounding air to vibrate, air conduction sound leakage occurs, affecting the user experience.

[0261] A sound output module is added to the vibration output module. The air-conducted sound waves output by the sound output module interact with the air-conducted sound leakage generated by the vibration output module to reduce external sound leakage.

[0262] The effect of reducing external sound leakage can also be adjusted by modifying the phase and amplitude of the sound output module (e.g., an air-conducting speaker). Taking the case where the vibration output module is placed in front of the ear as an example, adjusting the phase of the sound output module so that its output sound is in phase with the leakage sound from the vibration module will increase the overall sound leakage of the device; adjusting the phase of the sound output module so that its output sound is out of phase with the leakage sound from the vibration module will decrease the overall sound leakage of the device. Due to the distance between the two modules, sound leakage reduction is only achieved in specific frequency bands.

[0263] Adjusting the signal amplitude of the audio output module can also adjust the amplitude of the output audio, thus affecting the effectiveness of reducing external sound leakage. If the output audio amplitude is too small, the sound cancellation effect will be insignificant; if the output audio amplitude is too large, the output audio will dominate the leakage component, and it will also fail to reduce sound leakage. Only when the amplitude of the output audio is roughly equal to the amplitude of the leakage audio will there be a noticeable reduction in sound leakage.

[0264] In some embodiments, augmented reality (AR) / virtual reality (VR) devices include sound output devices as described above. For example, one or more sound and vibration output modules can be provided on the AR / VR device to provide auditory and tactile input to the user. Combined with the visual input of the AR / VR device, the user's immersion can be enhanced. In particular, a set of sound and vibration output modules can be provided on each of the user's left and right ears, which can provide the user with stereo sound effects and corresponding vibration patterns. In particular, an array of sound and vibration output modules can be provided on the eye mask or headband of the AR / VR device to achieve directional sound output and to provide spatial positioning cues using the vibration output module array. For example, the output of the sound output module array can be controlled based on user movement and rotation signals obtained from sensors (three-axis accelerometers, gyroscopes, etc.) to allow the user to locate the position through hearing. The vibration patterns of the vibration output module array can also be controlled to provide the user with information such as distance, angle, and force.

Claims

1. A sound output device, characterized in that, The sound output device includes a vibrating speaker, an air-conducting speaker, and a signal processing module. The signal processing module includes a bone conduction signal processing circuit and an air conduction signal processing circuit. The vibrating speaker includes a first vibration component, which is electrically connected to the bone conduction signal processing circuit to receive a bone conduction control signal and generate bone conduction sound waves based on the bone conduction control signal. The air-conducting speaker includes a housing and a second vibration component, which is electrically connected to the air conduction signal processing circuit to receive an air conduction control signal and generate air conduction sound waves based on the air conduction control signal. The first vibration component includes a vibrating plate connected to the housing for generating the bone conduction sound waves, and the second vibration component includes a diaphragm connected to the housing for generating the air conduction sound waves. The air conduction signal processing circuit includes a high-frequency signal processing module and a low-frequency signal processing module. After the high-frequency component of the air-conducted sound wave is processed by the high-frequency signal processing module in terms of amplitude and phase, it has an amplitude and phase opposite to the high-frequency leakage of the bone conduction sound wave. The high-frequency component of the air-conducted sound wave is used to attenuate the high-frequency leakage of the bone conduction sound wave. After the low-frequency component of the air-conducted sound wave is processed by the low-frequency signal processing module in terms of amplitude and phase, it has an amplitude and phase that enhances the low frequency of the bone conduction sound wave. The low-frequency component of the air-conducted sound wave is used to enhance the user's low-frequency sound perception.

2. The sound output device according to claim 1, characterized in that, The first vibration component further includes a magnetic circuit system and a first coil. The magnetic circuit system is configured to generate a first magnetic field. The first coil is connected to the vibrating plate and electrically connected to the bone conduction signal processing circuit. The first coil receives the bone conduction control signal and generates a second magnetic field based on the bone conduction control signal. The first magnetic field interacts with the second magnetic field to cause the vibrating plate to generate the bone conduction sound waves. The second vibration component further includes a second coil. The second coil is connected to the diaphragm and electrically connected to the air conduction signal processing circuit. The second coil receives the air conduction control signal and generates a third magnetic field based on the air conduction control signal. The first magnetic field interacts with the third magnetic field to cause the diaphragm to generate the air conduction sound waves.

3. The sound output device according to claim 2, characterized in that, The magnetic circuit system is provided with a first magnetic gap and a second magnetic gap, and is configured to generate the first magnetic field in the first magnetic gap and the second magnetic gap. The first coil is disposed in the first magnetic gap, and the second coil is disposed in the second magnetic gap.

4. The sound output device according to claim 3, characterized in that, The first magnetic gap and the second magnetic gap are disposed on opposite sides of the magnetic circuit system.

5. The sound output device according to claim 2, characterized in that, The vibrating loudspeaker also includes an elastic element, through which the magnetic circuit system is connected to the housing.

6. The sound output device according to claim 1, characterized in that, The air-conducted sound wave is output from the inside of the housing to the outside of the housing through the sound outlet, which is located on the side of the housing away from the vibrating plate.

7. The sound output device according to claim 1, characterized in that, The bone conduction signal processing circuit includes a full-frequency signal processing module, which is configured to generate a bone conduction output signal based on an initial acoustic signal. The bone conduction output signal is amplified by a first power amplifier to become the bone conduction control signal. The air conduction signal processing circuit further includes a frequency division module and a signal synthesis module. The frequency division module is configured to decompose the initial acoustic signal into high-frequency signal components and low-frequency signal components. The high-frequency signal processing module is coupled to the frequency division module and configured to generate a high-frequency output signal based on the high-frequency signal components. The low-frequency signal processing module is coupled to the frequency division module and configured to generate a low-frequency output signal based on the low-frequency signal components. The signal synthesis module is coupled to the high-frequency signal processing module and the low-frequency signal processing module and configured to synthesize the high-frequency output signal and the low-frequency output signal into an air conduction output signal. The air conduction output signal is amplified by a second power amplifier into the air conduction control signal.

8. The sound output device according to claim 1, characterized in that, The signal processing module includes a subband decomposition module, a vibration signal processing module, and a sound signal processing module. The subband decomposition module is configured to decompose the initial acoustic signal into multiple signal components, each located in a different frequency band. The vibration signal processing module is configured to generate multiple bone conduction output signals based on the multiple signal components. The sound signal processing module is configured to generate multiple air conduction output signals based on the multiple signal components. The multiple bone conduction output signals and the multiple air conduction output signals are further synthesized and then amplified to form the bone conduction control signal and the air conduction control signal.

9. The sound output device according to claim 1, characterized in that, The air-conducted sound wave contains low-to-mid frequency components, and the bone-conducted sound wave contains mid-to-high frequency components. The bone-conducted sound wave and the air-conducted sound wave contain different frequency components and complement each other in frequency bands.

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