Novel bone gas conduction sounding device

Abstract

The utility model relates to the technical field of loudspeaking equipment, and discloses a novel bone gas conduction sound production device, which comprises a shell, a sound generation device and a loudspeaker, the outer wall of the vibration cylinder body is propped against the inner wall of the accommodating cavity; the vibration assembly is fixedly connected with the vibration cylinder body through a connecting piece; the fixing cover covers the opening of the accommodating cavity, and the edge of the fixing cover and the edge of the opening of the accommodating cavity are clamped and fixed together; a through hole is formed in the fixed cover; and the vibrating diaphragm is arranged on the through hole in a covering manner, and the edge of the vibrating diaphragm is fixedly connected with the edge of the through hole. The problem that other parts are inconvenient to install in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, and specifically to a novel bone air conduction sound-generating device. Background Technology

[0002] Most headphones on the market currently use air conduction and / or bone conduction for sound transmission. During the manufacturing process, the vibration component is typically fixed directly to the inside of the headphone shell, meaning the vibration component and the shell are designed as a single unit. This means that when the vibration component needs to be installed or replaced, it cannot be replaced separately; the entire headphone shell must be replaced. Furthermore, because the vibration component and shell are integrated, installing other parts on the vibration component is inconvenient due to the limitations imposed by the shell's structure. Utility Model Content

[0003] This application provides a novel bone air conduction sound-generating device, which aims to solve the problem of inconvenience in installing other components in the prior art.

[0004] In one embodiment, a novel bone air conduction sound-generating device is provided, comprising:

[0005] A housing having a receiving cavity;

[0006] A vibrating cylinder, the outer wall of which abuts against the inner wall of the accommodating cavity;

[0007] A vibration assembly, which is fixedly connected to the vibration cylinder via a connecting piece;

[0008] A fixing cover covers the opening of the accommodating cavity, and the edge of the fixing cover is engaged and fixed to the edge of the opening of the accommodating cavity; the fixing cover has a through hole.

[0009] A vibrating diaphragm is provided over the through hole, and the edge of the vibrating diaphragm is fixedly connected to the edge of the through hole.

[0010] The edge of the vibrating diaphragm is fixed to the edge of the through hole by adhesive bonding.

[0011] In one embodiment, the vibration assembly includes: a substrate, a coil, a magnet, and a cover; the substrate is fixedly connected to the vibration cylinder, and the coil is electrically connected to the substrate; the cover is located inside the vibration cylinder and is fixedly connected to the connecting piece; the magnet is adsorbed and fixed on the cover, and a portion of the magnet extends into the area enclosed by the coil.

[0012] Specifically, the substrate is electrically connected to a mobile battery or an external power source. The coil is wound to form a cylindrical structure, with a portion of the magnet extending into the interior of the cylindrical coil; the magnet and coil are spaced apart. A Bluetooth module is mounted on the substrate.

[0013] In one embodiment, the magnet has a first end and a second end opposite to each other. The first end is magnetically fixedly connected to the cover, and the second end is fixedly connected to a first demagnetizing plate. The first demagnetizing plate is located in the area enclosed by the coil.

[0014] In one embodiment, a second demagnetizing plate is fixedly connected to the vibrating diaphragm, and the second demagnetizing plate is located directly above the first end.

[0015] In one embodiment, the vibrating cylinder is covered with a protective cover, and the edge of the protective cover is fixedly connected to the inner wall of the vibrating cylinder.

[0016] Specifically, the edge of the protective cover is snapped into and fixed to the inner wall of the vibrating cylinder. The base plate and the protective cover are respectively fixedly connected to both ends of the vibrating cylinder.

[0017] In one embodiment, the connecting piece includes: a first fixing part, a second fixing part, and a connecting part; the first fixing part is fixedly connected to the vibrating cylinder, and the second fixing part is fixedly connected to the cover; the first fixing part and the second fixing part are fixedly connected together through the connecting part.

[0018] Specifically, both the first fixing part and the second fixing part are annular, and the size of the first fixing part is larger than the size of the second fixing part.

[0019] In one embodiment, the connecting portion has a first connecting end and a second connecting end, the first connecting end and the second connecting end being fixedly connected to the first fixing portion and the second fixing portion, respectively.

[0020] Specifically, the connecting part is strip-shaped, and the dimensions of both the first and second connecting ends are larger than the dimensions of the middle part of the connecting part. The connecting piece is a one-piece molded part.

[0021] In one embodiment, there are multiple connecting portions, which are spaced apart along the extension direction of the first fixing portion.

[0022] In one embodiment, the accommodating cavity has a connection hole on its side for a line to pass through.

[0023] Specifically, the connection hole is filled with a filler.

[0024] In one embodiment, a groove is formed on the opening edge of the accommodating cavity, and the edge of the fixing cover has a protrusion that can be locked into the groove.

[0025] The beneficial effects of this application are:

[0026] The installation of the vibration component is completed by first installing the vibration cylinder into the vibrating cylinder body, and then inserting the vibrating cylinder body into the receiving cavity of the outer shell. After covering with the fixing cover and the vibrating diaphragm, the installation of the sound generating device is completed. Since the vibrating cylinder body and the outer shell can be separated, the outer shell and the vibrating cylinder body can be produced separately, thus improving production efficiency.

[0027] After the vibratory cylinder is separated from the outer shell, the installation of the vibratory components into the vibratory cylinder is not restricted by the outer shell structure, making installation more convenient and faster, and improving production efficiency. Because the vibratory cylinder can be separated from the outer shell, the vibratory components can be replaced simply by pulling out the vibratory cylinder, which eliminates the need to replace the outer shell compared to existing technologies, thus improving resource utilization.

[0028] The modular design of the vibratory cylinder and outer shell improves assembly and production efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the sound-generating device structure in one embodiment of this application;

[0031] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure along direction A;

[0032] Figure 3 yes Figure 1 The main view of the cross-sectional structure along direction A;

[0033] Figure 4 yes Figure 3 Enlarged view of a portion of point B in the middle;

[0034] Figure 5 This is a schematic diagram of an explosion of a sound-generating device in one embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the connecting piece structure in one embodiment of this application;

[0036] Labels for each item in the figure:

[0037] 1. Outer shell; 11. Receiving cavity; 12. Connecting hole; 13. Groove; 2. Vibrating cylinder; 3. Vibrating assembly; 31. Base plate; 32. Coil; 33. Magnet; 331. First end; 332. Second end; 34. Cover; 4. Connecting piece; 41. First fixing part; 42. Second fixing part; 43. Connecting part; 431. First connecting end; 432. Second connecting end; 5. Fixing cover; 51. Raised strip; 52. Raised part; 53. Through hole; 54. Raised ring; 6. Vibrating diaphragm; 61. Pleated ring; 7. First demagnetizing plate; 8. Second demagnetizing plate; 9. Sealing ring. Detailed Implementation

[0038] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] This application proposes improvements and innovations, and presents the following embodiments.

[0045] In some implementations, please refer to Figures 1 to 6 A novel bone air conduction sound generation device is provided, comprising:

[0046] Housing 1, housing 1 having a receiving cavity 11;

[0047] The outer wall of the vibrating cylinder 2 abuts against the inner wall of the accommodating cavity 11;

[0048] Vibration component 3 is fixedly connected to vibration cylinder 2 via connecting piece 4;

[0049] A fixing cover 5 covers the opening of the receiving cavity 11, and the edge of the fixing cover 5 is engaged and fixed together with the edge of the opening of the receiving cavity 11; a through hole 53 is provided on the fixing cover 5.

[0050] A vibrating diaphragm 6 is placed over the through hole 53, and the edge of the vibrating diaphragm 6 is fixedly connected to the edge of the through hole 53.

[0051] The edge of the vibrating diaphragm 6 is fixed to the edge of the through hole 53 by adhesive bonding, that is, the edge of the vibrating diaphragm 6 and the edge of the through hole 53 are both fixedly connected by sealant.

[0052] Specifically, the edge of the vibrating diaphragm 6 is a thin metal sheet made of titanium or beryllium, and the thickness of the metal sheet of the vibrating diaphragm 6 is 0.5um to 2.4um, while the vibrating diaphragm 6 in other areas is made of PET (polyethylene terephthalate).

[0053] A thinner diaphragm can provide a faster transient response and richer detail, especially in the high-frequency range. However, being too thin may result in insufficient rigidity, affecting sound quality.

[0054] A thicker diaphragm 6 can provide better low-frequency response and stiffness, but may sacrifice some high-frequency detail and transient response.

[0055] One end edge of the vibrating cylinder 2 has an extension that abuts against the inner wall of the fixed cover 5, which allows the vibration of the vibrating cylinder 2 to be directly transmitted to the fixed cover 5, thus reducing the energy loss of the vibration transmitted to the fixed cover 5.

[0056] Specifically, both the outer surface of the vibrating cylinder 2 and the inner wall of the accommodating cavity 11 are provided with mating threads, and the vibrating cylinder 2 and the accommodating cavity 11 are connected by the threaded connection. The threaded connection facilitates the installation of the vibrating cylinder 2 and improves the firmness of the connection.

[0057] The installation of the vibration component 3 is completed by first installing the vibration cylinder 2 into the vibrating cylinder 2, and then installing the vibrating cylinder 2 into the receiving cavity 11 of the outer shell 1. After covering the fixed cover 5 and the vibrating diaphragm 6, the installation of the sound generating device is completed. Since the vibrating cylinder 2 and the outer shell 1 can be separated, the outer shell 1 and the vibrating cylinder 2 can be produced separately, thus improving production efficiency.

[0058] After the vibrating cylinder 2 is separated from the outer shell 1, the installation of the vibrating component 3 into the vibrating cylinder 2 is not restricted by the structure of the outer shell 1, making installation more convenient and faster, and improving production efficiency. Since the vibrating cylinder 2 can be separated from the outer shell 1, the vibrating component 3 can be replaced simply by pulling out the vibrating cylinder 2. Compared with the existing technology, it is not necessary to replace the outer shell 1, which improves resource utilization.

[0059] The vibrating cylinder 2 and the outer shell 1 adopt a modular design, which can improve assembly efficiency and production efficiency.

[0060] Specifically, the inner wall of the through hole 53 has an annular protrusion 54, and the lower part of the protrusion 54 has a flat mounting surface. The edge of the diaphragm 6 is fixedly connected to the mounting surface with sealant. The protrusion 54 increases the area of ​​the mounting surface, thus providing sufficient mounting space for the diaphragm 6. The edge of the diaphragm 6 can adhere sufficiently to the mounting surface, improving the firmness of the connection between the diaphragm 6 and the fixing cover 5. Moreover, such a large mounting surface improves the waterproof performance at the connection between the fixing cover 5 and the diaphragm 6, thereby improving the overall waterproof performance of the sound-generating device.

[0061] In one embodiment, the vibration assembly 3 includes: a substrate 31, a coil 32, a magnet 33, and a cover 34; the substrate 31 is fixedly connected to the vibration cylinder 2, and the coil 32 is electrically connected to the substrate 31; the cover 34 is located inside the vibration cylinder 2, and the cover 34 is fixedly connected to the connecting piece 4; the magnet 33 is adsorbed and fixed on the cover 34, and a portion of the magnet 33 extends into the area enclosed by the coil 32. The coil 32 on the substrate 31 generates an alternating magnetic field, which in turn drives the magnet 33 to move. The movement of the magnet 33 drives the cover 34 to vibrate, the cover 34 drives the connecting piece 4 to vibrate, the vibrating piece drives the vibration cylinder 2 to vibrate, and finally drives the outer shell 1 and the fixed cover 5 to vibrate. The outer shell 1 is worn in the ear, and the outer shell 1 and the fixed cover 5 are in contact with the human bone. Therefore, the vibration of the outer shell 1 and the fixed cover 5 can be transmitted through the human bone to achieve bone conduction.

[0062] The vibration of the cover 34 causes the air inside the accommodating cavity 11 to vibrate, producing a breathing effect, which in turn causes the vibrating diaphragm 6 to vibrate, thus realizing air conduction of sound.

[0063] This device can achieve both bone conduction and air conduction. Bone conduction can better transmit low-frequency sounds, while air conduction has a better transmission effect on high-frequency vibrations. Therefore, this device can achieve good propagation over a wide frequency range.

[0064] Specifically, the substrate 31 is electrically connected to a mobile battery or an external power source. The coil 32 is wound to form a cylindrical structure, and a portion of the magnet 33 extends into the interior of the cylindrical coil 32; the magnet 33 and the coil 32 are spaced apart. A Bluetooth module is mounted on the substrate 31. The Bluetooth module enables wireless transmission of the headphone output signal.

[0065] In one embodiment, the magnet 33 has a first end 331 and a second end 332, the first end 331 being magnetically fixed to the cover 34, and the second end 332 being fixedly connected to a first demagnetizing plate 7. The first demagnetizing plate 7 is located in the area enclosed by the coil 32. The first demagnetizing plate 7 at the first end 331 of the magnet 33 neutralizes residual magnetism generated during the operation of the magnet or coil 32, preventing stray magnetic fields from interfering with the voice coil vibration, thereby reducing signal distortion and improving sound purity. The converging effect of the first demagnetizing plate 7 on the magnetic field improves the uniformity of the magnetic field within the dynamic coil unit, enhancing electromagnetic conversion efficiency. This helps reduce energy loss, making the voice coil vibration more precise, thereby improving transient response and sound detail. The first demagnetizing plate 7 eliminates residual magnetism, concentrates the effective magnetic field, and isolates interference sources, ultimately achieving sound quality optimization, efficiency improvement, and enhanced device stability.

[0066] In one embodiment, a second demagnetizing plate 8 is fixedly connected to the diaphragm 6, and the second demagnetizing plate 8 is located directly above the first end 331. The two demagnetizing plates are mainly used to balance the magnetic field distribution and avoid interference from a unilateral magnetic field on the diaphragm's vibration path. When the diaphragm 6 is in direct contact with a magnetic field, long-term vibration may lead to material fatigue or residual magnetization. The demagnetizing plates reduce the risk of the magnetic field directly acting on the diaphragm through physical isolation.

[0067] Specifically, the first demagnetizing plate 7 and the second demagnetizing plate 8 are respectively located directly above and below the first end 331 and the second end 332 of the magnet 33. The first demagnetizing plate 7 and the second demagnetizing plate 8 can improve sound quality and energy efficiency, thereby enhancing high-frequency details. By stabilizing the magnetic field, the first demagnetizing plate 7 and the second demagnetizing plate 8 make the vibration of the voice coil on the diaphragm more precise, reduce transient response delay, and improve high-frequency resolution (such as sibilance in human voices and overtones in musical instruments).

[0068] It can also improve low-frequency control. The first demagnetizing plate 7 and the second demagnetizing plate 8 can distribute the magnetic field evenly, thereby improving the consistency of the voice coil driving force and avoiding the looseness or dragging phenomenon caused by uneven magnetic force distribution in low frequencies.

[0069] It can also reduce energy loss. The first demagnetizing plate 7 and the second demagnetizing plate 8 can concentrate the effective magnetic field, reduce the leakage of magnetic field lines, and make the conversion of electrical energy into mechanical energy more efficient, with lower power consumption at the same volume.

[0070] The second demagnetizing sheet 8 is attached to the diaphragm 6, which can limit the resonance of the non-working area of ​​the diaphragm (such as edge segmentation vibration) and ensure that the vibration energy is concentrated in the effective sound-generating area.

[0071] Furthermore, the vibrating diaphragm 6 is a composite membrane (such as bio-fiber + metal coating) that is sensitive to magnetic fields, and the second demagnetizing sheet 8 can avoid vibration phase disorder caused by differences in magnetization between different materials.

[0072] Specifically, the diaphragm 6 is provided with a corrugated ring 61, and the second demagnetizing plate 8 is located in the middle region of the corrugated ring 61. The corrugated ring 61 is arranged around the circumference of the second demagnetizing plate 8. The corrugated ring 61 is a ring that protrudes outward. By setting the corrugated ring 61, the diaphragm can flexibly expand / contract when driven by electromagnetic force, reducing the vibration energy loss caused by rigid connection. For example, the deformation capability of the corrugations can optimize the low-frequency response and prevent the diaphragm from being unable to effectively transmit low-frequency sound waves due to excessive rigidity. Moreover, the corrugated ring 61 can buffer the mechanical stress during the vibration process, prevent the diaphragm from fatigue cracking due to long-term large amplitude vibration, and extend the service life of the diaphragm 6.

[0073] Furthermore, the protrusion of the pleated ring 61 provides a position for the installation of the second demagnetizing sheet 8 and restricts the movement of the second demagnetizing sheet 8. The edge of the second demagnetizing sheet 8 abuts against the protrusion of the pleated ring 61, thus improving the firmness of the connection between the second demagnetizing sheet 8 and the vibrating diaphragm 6.

[0074] In one embodiment, a protective cover is provided on the vibrating cylinder 2, and the edge of the protective cover is fixedly connected to the inner wall of the vibrating cylinder 2. The protective cover effectively protects the cover body from movement.

[0075] Specifically, the edge of the protective cover has a locking portion extending radially outward along the vibrating cylinder 2, and a limiting groove is provided on the inner wall of the vibrating cylinder 2 for the locking portion to engage and be limited. The locking portion effectively restricts the movement of the protective cover within the vibrating cylinder 2.

[0076] Specifically, the protective cover has air holes, which help the cover body; the air vibration generated by the vibration of the 34 is transmitted to the vibrating diaphragm 6, thereby driving the vibration of the vibrating diaphragm 6 and improving the vibration sensitivity of the vibrating diaphragm 6.

[0077] Specifically, the edge of the protective cover is snapped and fixed to the inner wall of the vibrating cylinder 2. The base plate 31 and the protective cover are respectively fixedly connected to both ends of the vibrating cylinder 2. The base plate 31 and the protective cover are respectively fixedly connected to both ends of the vibrating cylinder 2 to provide sufficient space for the magnet 33 and the coil 32, ensuring sufficient vibration space for the cover 34.

[0078] In one embodiment, the connecting piece 4 includes a first fixing part 41, a second fixing part 42, and a connecting part 43; the first fixing part 41 is fixedly connected to the vibrating cylinder 2, and the second fixing part 42 is fixedly connected to the cover 34; the first fixing part 41 and the second fixing part 42 are fixedly connected together through the connecting part 43. The connecting piece 4, divided into the first fixing part 41, the second fixing part 42, and the connecting part 43, can provide a larger amplitude for the vibration of the cover 34, thereby improving the vibration sensitivity of the cover 34.

[0079] Specifically, both the first fixing part 41 and the second fixing part 42 are annular, and the size of the first fixing part 41 is larger than the size of the second fixing part 42. This design is reasonable and can fit the edge of the cover 34 and the inner wall of the vibrating cylinder 2.

[0080] Specifically, the inner wall of the vibrating cylinder 2 is provided with a slot for the first fixing part 41 to be inserted into, and the first fixing part 41 abuts against the inner wall of the slot.

[0081] The second fixing part 42 is fixedly connected to the cover body 34 by adhesive.

[0082] In one embodiment, the connecting portion 43 has a first connecting end 431 and a second connecting end 432, which are respectively fixedly connected to the first fixing portion 41 and the second fixing portion 42. The design of the connecting portion 43 being fixedly connected to the first fixing portion 41 and the second fixing portion 42 via the first connecting end 431 and the second connecting end 432 is reasonable.

[0083] Specifically, the connecting portion 43 is strip-shaped, and the dimensions of both the first connecting end 431 and the second connecting end 432 are larger than the dimension at the middle position of the connecting portion 43. The connecting piece 4 is a one-piece molded part. The design of having both the first connecting end 431 and the second connecting end 432 larger than the dimension at the middle position of the connecting portion 43 provides a larger amplitude for the vibration of the cover 34, improving the vibration sensitivity of the cover 34. The one-piece molding of the connecting piece 4 facilitates production and improves the structural strength of the connecting piece 4.

[0084] In one embodiment, there are multiple connecting portions 43, which are spaced apart along the extending direction of the first fixing portion 41. The spaced distribution of the multiple connecting portions 43 can improve the uniformity of the force on the cover during vibration.

[0085] In one embodiment, a connection hole 12 for a wire to pass through is provided on the side of the accommodating cavity 11. The connection hole 12 is provided for the wire to pass through.

[0086] Specifically, the connecting hole 12 is filled with a filler. Adding the filler allows the receiving cavity 11 to form a sealed space, ensuring the sensitivity of the air vibration within the receiving cavity 11.

[0087] In one embodiment, a groove 13 is formed on the opening edge of the accommodating cavity 11, and the edge of the fixing cover 5 has a protrusion 51 that can be locked into the groove 13. The mutual cooperation between the groove 13 and the protrusion 51 can improve the firmness of the connection.

[0088] Specifically, a sealing ring 9 is pressed together at the connection between the opening edge of the fixed cover 5 and the receiving cavity 11, and a protrusion 52 is provided on the side of the protrusion 51. A groove is provided on the inner wall of the groove 13 for the protrusion 52 to be inserted. When the protrusion 52 is inserted into the groove, the opening edge of the fixed cover 5 and the receiving cavity 11 abuts, and the protrusion 52 can prevent the protrusion 51 from sliding out of the groove 13. The sealing ring 9 improves the sealing performance of the connection between the fixed cover 5 and the outer shell 1.

[0089] Specifically, the substrate houses a processor for optimizing sound quality and enhancing intelligence. The processor is electrically connected to the Bluetooth module, and a power bank is housed within the cavity, also electrically connected to the processor. The processor contains a pre-installed equalizer. The equalizer has pre-defined parameters: low-frequency enhancement: increasing the gain of the 62-125Hz band (+1 to +3dB) to enhance rhythm, but avoiding excessive muddiness; mid-frequency optimization: boosting around 500Hz by 2-4dB to highlight vocals, and moderately attenuating 4000Hz (-1 to -2dB) to reduce sibilance; and high-frequency transparency: boosting 8-16kHz by 1-3dB to increase airiness, adjusted in conjunction with the headphone's native high-frequency characteristics.

[0090] The frequency band gain control is implemented using the following formula:

[0091] Single-frequency gain adjustment formula:

[0092] Gain dB (f)=α×Harman_curve(f)+β×User_pref(f)+γ×Noise_mask(f); where, α, β, γ

[0093] The weighting coefficient is dynamically adjusted based on the environmental noise spectrum and user preferences.

[0094] Q value controls frequency band width:

[0095]

[0096] fc is the center frequency, and Δf is the bandwidth, used to precisely adjust the gain range of a specific frequency band (such as the human voice band 500Hz-2kHz).

[0097] Active Noise Cancellation (ANC) Inverted Wave Generation Formula:

[0098] Noise cancellation phase compensation:

[0099] y(t)=x(t)×e j(ωt+π)

[0100] This formula is used to shift the phase of the noise signal x(t) acquired by the microphone by 180° (+π) to generate a reverse sound wave to cancel out the ambient noise.

[0101] Hybrid noise reduction energy optimization:

[0102] Pnoise is the noise power, and Pmusic is the music signal power, used to calculate the noise reduction compensation gain.

[0103] Among them, the optimization of hybrid noise reduction energy can also be achieved by setting a dual-microphone topology on the sound-generating device, namely a feedforward microphone and a feedback microphone. The feedforward microphone is located on the outside of the housing to capture ambient noise (200Hz-2kHz high frequency band) in advance and provide a 3-5ms pre-response time.

[0104] The feedback microphone is located on the fixed cover, close to the ear canal entrance, and is used to monitor residual noise (50-500Hz low frequency band) in real time and dynamically correct noise reduction errors. Dual-channel signal synchronous processing is achieved through weighted summation, expressed by the formula: y(t)=α×F×Fout+(1-α)×FBout; where α is the dynamic adjustment coefficient, and the value of α is 0.3≤α≤0.7; α is the smoothing constant; F: current actual value; Fout: predicted value; FBout: current predicted value.

[0105] In low-frequency dominant scenarios (such as subway rumble), α automatically decreases to 0.3-0.4, enhancing the low-frequency suppression capability of FBout.

[0106] In high-frequency burst scenarios (such as keyboard taps), α instantly increases to 0.7-0.8, primarily relying on FFout's fast response characteristics.

[0107] When the proportion of low-frequency noise is greater than 40%, increase the feedback path weight (α is reduced to 0.2-0.3).

[0108] When high-frequency noise suddenly occurs, the instantaneous weight of the feedforward path is increased to 0.8, achieving a fast response within 10ms.

[0109] When residual noise is greater than -35dB, a 4:1 compression ratio is activated to prevent signal overload.

[0110] Dynamic Range Compression (DRC) algorithm;

[0111] Transient signal compression ratio:

[0112]

[0113] When low-frequency energy E lowWhen the proportion is too high, the compression ratio is automatically increased to avoid low-frequency standing wave distortion.

[0114] Among them, the low-frequency signal energy E low When the proportion of low-frequency standing wave (VSWR) exceeds 30%-40% of the total energy (usually referring to the 80Hz-200Hz frequency band), it is considered to be in an "excessive" state. At this time, the DRC algorithm will trigger an automatic compression ratio increase mechanism to suppress the risk of low-frequency VSWR distortion.

[0115] Among them, the low-frequency signal energy E low When the proportion exceeds 30%-40% of the total energy, start light compression (compression ratio of 1.5:1 to 3:1);

[0116] Low-frequency signal energy E low When the energy percentage exceeds 40%-50% of the total energy, activate high compression (compression ratio of 4:1 or higher).

[0117] When low-frequency energy reaches more than 45% of the total energy, the compression ratio increment mechanism is activated, increasing the compression ratio by 1.5 times for every 5% increase in energy percentage. When it exceeds 55%, the hard limiter is forcibly activated, limiting the peak value to within -3dBFS.

[0118] When the input signal exceeds the threshold, the hard limiter directly truncates the excess portion with an infinite compression ratio (∞:1), as expressed by the formula: When Lpeak ≤ -3dBFS; when Lpeak > -3dBFS; where Lpeak is the real-time peak level.

[0119] After activating the hard limiter, the total harmonic distortion (THD) can be reduced from more than 15% to less than 1%.

[0120] Gain smoothing:

[0121]

[0122] A moving average filter is applied to the instantaneous gain to suppress auditory discomfort caused by sudden changes in adjustment.

[0123] Volume gain to decibel conversion formula;

[0124] dB to gain mapping:

[0125]

[0126] Gain calculations used in scenarios such as EQ adjustment and dynamic compression (e.g., +3dB corresponds to a gain value of ≈1.414).

[0127] Relationship between power and sound pressure level:

[0128] SPL = Sensitivity + 10 × log(P) output Poutput is the driving power, which is used to calculate the actual sound pressure level based on the headphone sensitivity to avoid overload distortion.

[0129] Multi-scenario power optimization formula;

[0130] Impedance matching power calculation: Based on the headphone impedance R and the effective value of the device output voltage V rms Dynamically limit output power to protect the hardware.

[0131] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this utility model.

Claims

1. A novel bone-conduction sound-generating device, characterized in that, include: A housing having a receiving cavity; A vibrating cylinder, the outer wall of which abuts against the inner wall of the accommodating cavity; A vibration assembly, which is fixedly connected to the vibration cylinder via a connecting piece; A fixing cover covers the opening of the accommodating cavity, and the edge of the fixing cover is engaged and fixed to the edge of the opening of the accommodating cavity; the fixing cover has a through hole. A vibrating diaphragm is provided over the through hole, and the edge of the vibrating diaphragm is fixedly connected to the edge of the through hole.

2. The novel bone air conduction sound-generating device according to claim 1, characterized in that, The vibration assembly includes: a base plate, a coil, a magnet, and a cover; the base plate is fixedly connected to the vibration cylinder, and the coil is electrically connected to the base plate; the cover is located inside the vibration cylinder and is fixedly connected to the connecting piece; the magnet is adsorbed and fixed on the cover, and a portion of the magnet extends into the area enclosed by the coil.

3. The novel bone air conduction sound-generating device according to claim 2, characterized in that, The magnet has a first end and a second end, the first end is magnetically fixed to the cover, and the second end is fixedly connected to a first demagnetizing plate; the first demagnetizing plate is located in the area enclosed by the coil.

4. The novel bone air conduction sound-generating device according to claim 3, characterized in that, A second demagnetizing plate is fixedly connected to the vibrating diaphragm, and the second demagnetizing plate is located directly above the first end.

5. The novel bone air conduction sound-generating device according to claim 1, characterized in that, The vibrating cylinder is covered with a protective cover, and the edge of the protective cover is fixedly connected to the inner wall of the vibrating cylinder.

6. The novel bone air conduction sound-generating device according to claim 3, characterized in that, The connecting piece includes: a first fixing part, a second fixing part, and a connecting part; the first fixing part is fixedly connected to the vibrating cylinder, and the second fixing part is fixedly connected to the cover; the first fixing part and the second fixing part are fixedly connected together through the connecting part.

7. The novel bone air conduction sound-generating device according to claim 6, characterized in that, The connecting part has a first connecting end and a second connecting end, and the first connecting end and the second connecting end are respectively fixedly connected to the first fixing part and the second fixing part.

8. The novel bone air conduction sound-generating device according to claim 7, characterized in that, The number of connecting parts is multiple, and the multiple connecting parts are distributed at intervals along the extension direction of the first fixing part.

9. The novel bone air conduction sound-generating device according to claim 1, characterized in that, The side of the accommodating cavity is provided with a connection hole for the line to pass through.

10. The novel bone air conduction sound-generating device according to any one of claims 1-9, characterized in that, The cavity has a groove on its opening edge, and the fixed cover has a protrusion that can be locked into the groove.

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