Wearable device

Abstract

A wearable device, comprising a support, wherein the following components are arranged inside the support: a first loudspeaker (3), which can output a first sound wave signal, the propagation direction comprising a first direction and a second direction, and an included angle θ meeting 90°<θ≤180°; and a second loudspeaker (4), which can output a second sound wave signal, the propagation direction being the second direction, and the two signals having the same waveform and opposite phases. When the wearable device is used, the first direction is a direction in which sounds propagate towards human ears, the second direction is a direction in which sounds propagate away from human ears, the first loudspeaker (3) is a main sound source, which transmits an audible sound, the second loudspeaker (4) adjusts the phase and waveform of the second sound wave signal, such that the second sound wave signal has the same waveform as the first sound wave signal and has an opposite phase to the first sound wave signal, the second sound wave signal can offset the first sound wave signal propagating in the second direction, and the sound attenuation of the first sound wave signal in the second direction is increased, that is, the degree of far-field isolation of the wearable device is improved, and thus the privacy is better.

Description

Wearable devices Technical Field

[0001] The present application relates to the technical field of wearable devices, and in particular to a wearable device. Background Art

[0002] When a wearable device's speaker is in use, the difference between the sound amplitude at the wearer's ear and the sound amplitude received at a distance from the wearer is called far-field isolation. The greater the far-field isolation, the less sound leakage the wearable device has, and the better the privacy of the wearable device. As you can understand, sound propagation is affected by distance, and the sound amplitude naturally attenuates with increasing distance. Therefore, to improve the privacy of wearable devices, it is necessary to increase the degree of sound amplitude attenuation.

[0003] Existing technical solutions incorporate rear cavity sound leakage holes in wearable devices. The reverse sound waves emitted from these holes cancel each other out at the far ear with the forward sound waves emitted from the main speaker's generating hole, reducing the sound amplitude received at the far ear and improving far-field isolation. However, this approach only improves the structure of the wearable device, and once the structure is finalized, it cannot be further optimized. Furthermore, it cannot effectively eliminate noise from speakers with different characteristics. Technical issues

[0004] Existing technical solutions incorporate rear cavity sound leakage holes in wearable devices. The reverse sound waves emitted from these holes cancel each other out at the far ear with the forward sound waves emitted from the main speaker's generating hole, reducing the sound amplitude received at the far ear and improving far-field isolation. However, this approach only improves the structure of the wearable device, and once the structure is finalized, it cannot be further optimized. Furthermore, it cannot effectively eliminate noise from speakers with different characteristics. Technical Solutions

[0005] In view of this, the present application provides a wearable device. Through the setting of a second speaker, the second speaker can adjust the phase and waveform according to the audio characteristics of the first sound wave signal, offset part of the first sound wave signal, and improve the far-field isolation of the wearable device.

[0006] The present application provides a wearable device, comprising a bracket, wherein the bracket is provided with:

[0007] The first speaker can output a first sound wave signal, wherein the propagation direction of the first sound wave signal includes a first direction and a second direction, wherein an angle θ between the first direction and the second direction satisfies: 90°<θ≤180°; and

[0008] The second speaker is located on one side of the first speaker in the second direction; the second speaker can output a second sound wave signal, the propagation direction of the second sound wave signal is the second direction, and the second sound wave signal has the same waveform as the first sound wave signal and an opposite phase.

[0009] In some embodiments, the wearable device further comprises a device body;

[0010] The bracket includes a first bracket and a second bracket, the first bracket and the second bracket are respectively rotatably connected to two sides of the device body, and the first speaker and the second speaker are both provided inside the first bracket and the second bracket.

[0011] In some embodiments, a receiving cavity is formed inside the first bracket and the second bracket, and the first speaker and the second speaker are installed in the receiving cavity.

[0012] In some embodiments, the wearable device further includes a driving unit, and the driving unit is disposed in the first bracket and / or the second bracket.

[0013] In some embodiments, the driving unit includes a central processing unit, an audio codec, and a driving amplifier array; wherein:

[0014] The output terminal of the central processing unit is connected to the input terminal of the audio codec;

[0015] The output end of the audio codec is connected to the input end of the driver amplifier array;

[0016] The output ends of the driving amplifier array are connected to the first loudspeaker and the second loudspeaker respectively.

[0017] In some embodiments, the wearable device further includes a power module; wherein the power module is respectively connected to the driving unit, the first speaker, and the second speaker.

[0018] In some embodiments, the wearable device further includes a charging module, which is connected to the power module.

[0019] In some embodiments, the wearable device further includes a rotating shaft assembly, the first bracket is connected to the device body via the rotating shaft assembly, and the second bracket is connected to the device body via the rotating shaft assembly.

[0020] In some embodiments, the direction in which the first bracket and the second bracket are relative to each other is a first direction.

[0021] In some embodiments, the wearable device includes but is not limited to at least one of an AR headset, a VR headset, an MR headset, smart glasses, and a wearable speaker. Beneficial effects

[0022] The wearable device provided in the present application, when used by the wearer, has the first direction being the direction of propagation toward the human ear, and the second direction being the direction of propagation away from the human ear. The first speaker is the main sound source of the wearable device, and is used to transmit audible sound to the human ear, while the second speaker can adjust the phase and waveform of the second sound wave signal emitted according to the audio characteristics of the first sound wave signal output by the first speaker. After the adjustment, the second sound wave signal propagating in the second direction has the same waveform as the first sound wave signal and the opposite phase, so that the second sound wave signal can offset at least part of the first sound wave signal propagating in the second direction, thereby increasing the sound attenuation of the first sound wave signal in the second direction. That is, the far-field isolation of the wearable device can be improved through the offsetting effect of the second speaker, and the privacy of the wearable device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a support for a wearable device provided in this application;

[0024] FIG2 is a distribution diagram of a wearable device in a first direction and a second direction provided by the present application;

[0025] FIG3 is a graph showing the test results of Example 1 and Comparative Example 1 of the present application.

[0026] Figure ID:

[0027] 1-first bracket; 11-accommodating chamber; 2-second bracket; 3-first speaker; 4-second speaker; 5-rotating shaft assembly. Best Mode for Carrying Out the Invention

[0028] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0032] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0033] When a wearable device's speaker is in use, the difference between the sound amplitude at the wearer's ear and the sound amplitude received at a distance from the wearer is called far-field isolation. The greater the far-field isolation, the less sound leakage the wearable device has, and the better the privacy of the wearable device. As you can understand, sound propagation is affected by distance, and the sound amplitude naturally attenuates with increasing distance. Therefore, to improve the privacy of wearable devices, it is necessary to increase the degree of sound amplitude attenuation.

[0034] Existing technical solutions incorporate rear cavity sound leakage holes in wearable devices. The reverse sound waves emitted from these holes cancel each other out at the far ear with the forward sound waves emitted from the main speaker's generating hole, reducing the sound amplitude received at the far ear and improving far-field isolation. However, this approach only improves the structure of the wearable device, and once the structure is finalized, it cannot be further optimized. Furthermore, it cannot effectively eliminate noise from speakers with different characteristics.

[0035] In view of this, the present application provides a wearable device, referring to FIG1 and FIG2 , including a bracket, in which:

[0036] The first speaker 3 can output a first sound wave signal, wherein the propagation direction of the first sound wave signal includes a first direction and a second direction, wherein an angle θ between the first direction and the second direction satisfies: 90°<θ≤180°; and

[0037] The second speaker 4 is located on one side of the first speaker 3 in the second direction; the second speaker 4 can output a second sound wave signal, the propagation direction of the second sound wave signal is the second direction, and the second sound wave signal has the same waveform as the first sound wave signal and an opposite phase.

[0038] When the wearable device provided in the present application is used by the wearer, the first direction is the direction of propagation toward the human ear, and the second direction is the direction of propagation away from the human ear. The first speaker 3 is the main sound source of the wearable device, which is used to transmit audible sound to the human ear, and the second speaker 4 can adjust the phase and waveform of the second sound wave signal emitted according to the audio characteristics of the first sound wave signal output by the first speaker 3. After the adjustment, the second sound wave signal propagating in the second direction has the same waveform and opposite phase as the first sound wave signal, so that the second sound wave signal can offset at least part of the first sound wave signal propagating in the second direction, and then the sound attenuation of the first sound wave signal in the second direction is increased. That is, the offsetting effect of the second speaker 4 can improve the far-field isolation of the wearable device, and the privacy of the wearable device is better.

[0039] In some embodiments, the wearable device of the present application includes but is not limited to at least one of an AR headset, a VR headset, an MR headset, AR audio glasses, and a wearable speaker, which can be selected according to actual needs and is not limited here.

[0040] The embodiments of the present application are described using AR audio glasses as an example.

[0041] The AR audio glasses include a device body and a bracket, the bracket includes a first bracket 1 and a second bracket 2, the first bracket 1 and the second bracket 2 are respectively rotatably connected to the two sides of the device body. Specifically, the wearable device includes a hinge assembly 5, the first bracket 1 is connected to the device body via the hinge assembly 5, and the second bracket 2 is connected to the device body via the hinge assembly 5. It can be understood that through the provision of the hinge assembly 5, when the wearer needs to store the AR audio glasses, the first bracket 1 and the second bracket 2 can be folded in a direction close to the device body, thereby reducing the storage space of the AR audio glasses and making it easier for the user to carry or store them.

[0042] In this application, the relative direction between the first bracket 1 and the second bracket 2 is the first direction, that is, when the user wears the wearable device, the direction toward the ear is the first direction, and the direction away from the ear is the second direction.

[0043] It should be noted that the angle θ between the first direction and the second direction satisfies: 90° < θ ≤ 180°. Optionally, θ can be 10°, 40°, 70°, 100°, 130°, 160°, 180°, or other values ​​within the range. This can be selected based on actual needs and is not limited here. It is understandable that along the dividing plane between the first speaker 3 and the second speaker 4, the side of the dividing plane close to the ear is the propagable direction of the first direction, and the side of the dividing plane away from the ear is the propagable direction of the second direction. That is, the first direction can be any direction of a hemispherical surface centered on the ear and radiating toward the ear, and the second direction can be any direction of a hemispherical surface centered on the ear and radiating away from the ear. Preferably, the angle θ between the first direction and the second direction satisfies: 90° < θ ≤ 180°. More preferably, the angle θ between the first direction and the second direction is 180°.

[0044] In some embodiments, the first bracket 1 and the second bracket 2 form a receiving cavity 11, and the first speaker 3 and the second speaker 4 are installed in the receiving cavity 11. It should be noted that the positions of the first speaker 3 and the second speaker 4 should be such that when the user wears the AR audio glasses, the position of the first speaker 3 corresponds to the position of the user's ear.

[0045] In this application, the first speaker 3 is defined as the main speaker, and the second speaker 4 is defined as the auxiliary speaker. The main speaker can convert the electrical signal into a first sound wave signal, that is, the audio electric power signal within a certain range is converted into an audible sound with low distortion and sufficient sound pressure level by transducing. The propagation direction of the audible sound includes propagation toward the ear and propagation away from the ear. In this process, if the first sound wave signal propagating away from the ear is slightly attenuated, the privacy of the wearable device will be reduced, that is, the sound insulation of the wearable device is poor. Therefore, a second speaker 4 is set. The second speaker 4 can output a second sound wave signal with the same waveform and opposite phase as the first sound wave signal based on the sound wave characteristics of the first sound wave signal, such as waveform and phase. The second sound wave signal propagates in the second direction, thereby offsetting the second sound wave signal propagating away from the ear, thereby improving the privacy of the AR audio glasses.

[0046] It should be noted that the analysis process of the first sound wave signal by the second speaker 4 is an AI analysis process, and then the waveform and phase of the output second sound wave signal are adjusted for the first sound wave signals with different phases and waveforms to adapt to different first sound wave signals. This is an active adjustment process, which can better improve the far-field isolation of the wearable device.

[0047] In some embodiments, the operation of the first speaker 3 and the second speaker 4 is achieved through a driver module. The driver unit is disposed within the first bracket 1 and / or the second bracket 2 and includes a central processing unit (CPU), an audio codec, and a driver amplifier array. The CPU output is connected to the audio codec input; the audio codec output is connected to the driver amplifier array input; and the driver amplifier array output is connected to the first speaker 3 and the second speaker 4, respectively. It will be appreciated that, through the driver module, the first speaker 3 and the second speaker 4 can output sound wave signals having different amplitudes, phases, and waveforms.

[0048] In some embodiments, the wearable device further includes a power module and a charging module, wherein the power module is respectively connected to the driving unit, the first speaker 3, and the second speaker 4. The wearable device further includes a charging module, which is connected to the power module. It is understood that the power module can provide current to the driving module, the first speaker 3, and the second speaker 4, and the charging module can replenish the power of the power module.

[0049] The technical solution of this application is described below with reference to specific embodiments:

[0050] Example 1

[0051] The wearable device of the present application having a first speaker and a second speaker is fixed on the ears of an artificial head, the frequency band of the first speaker is 100Hz~10kHz, and a first microphone is provided in the left ear of the artificial head.

[0052] Comparative Example 1

[0053] The difference from Example 1 is that the wearable device is not provided with a second speaker, but only with a first speaker.

[0054] test:

[0055] A second microphone was placed 60 cm away from the artificial head and in the direction of the left ear of the artificial head, i.e., in the 270° direction with the artificial head as the center. The isolation between the first and second microphones in each frequency band was tested (i.e., the sound pressure level tested at 60 cm minus the sound pressure level tested in both ears).

[0056] Test results:

[0057] FIG3 is a graph showing the test results of Example 1 and Comparative Example 1 of the present application. Referring to FIG3 , it can be seen from the test results of Example 1 and Comparative Example 1 that after the second speaker is set, the isolation of the wearable device provided by the present application is significantly higher than that of Comparative Example 1 within the test frequency band of 100 Hz to 10 kHz. That is, after the wearable device of the present application is set with the second speaker, the second speaker can adjust the phase and waveform of the emitted second sound wave signal according to the audio characteristics of the first sound wave signal output by the first speaker. After the adjustment, the second sound wave signal propagating in the second direction has the same waveform and opposite phase as the first sound wave signal, so that the second sound wave signal can offset at least part of the first sound wave signal propagating in the second direction, and thus the first sound wave signal has a large acoustic attenuation in the second direction, and the degree of acoustic attenuation increases with increasing distance. That is, the far-field isolation of the wearable device can be improved by the offsetting effect of the second speaker, and the privacy of the wearable device is better.

[0058] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A wearable device, comprising a bracket, characterized in that, the bracket is provided with: a first speaker, which can output a first sound wave signal, and the propagation direction of the first sound wave signal includes a first direction and a second direction, wherein the included angle θ between the first direction and the second direction satisfies: 90° < θ ≤ 180°; and a second speaker, located on one side of the first speaker in the second direction; the second speaker can output a second sound wave signal, the propagation direction of the second sound wave signal is the second direction, and the second sound wave signal has the same waveform and opposite phase as the first sound wave signal.

2. The wearable device according to claim 1, characterized in that, the wearable device further comprises a device body; the bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are respectively rotatably connected to two sides of the device body, and the first speaker and the second speaker are both arranged inside the first bracket and the second bracket.

3. The wearable device according to claim 2, characterized in that, an accommodation cavity is formed inside the first bracket and the second bracket, and the first speaker and the second speaker are installed in the accommodation cavity.

4. The wearable device according to claim 2, characterized in that, the wearable device further comprises a driving unit, and the driving unit is arranged inside the first bracket and / or the second bracket.

5. The wearable device according to claim 4, characterized in that, the driving unit comprises a central processing unit, an audio codec and a driving amplifier array; wherein: the output end of the central processing unit is connected to the input end of the audio codec; the output end of the audio codec is connected to the input end of the driving amplifier array; the output ends of the driving amplifier array are respectively connected to the first speaker and the second speaker.

6. The wearable device according to claim 4, characterized in that, the wearable device further comprises a power supply module; wherein, the power supply module is respectively connected to the driving unit, the first speaker and the second speaker.

7. The wearable device according to claim 6, characterized in that, the wearable device further comprises a charging module, and the charging module is connected to the power supply module.

8. The wearable device according to claim 2, characterized in that, the wearable device further comprises a rotating shaft assembly, the first bracket is connected to the device body through the rotating shaft assembly, and the second bracket is connected to the device body through the rotating shaft assembly.

9. The wearable device according to claim 2, characterized in that, the direction in which the first bracket and the second bracket face each other is the first direction.

10. The wearable device according to claim 1, characterized in that, the wearable device includes at least one of, but is not limited to, an AR head-mounted all-in-one machine, a VR head-mounted all-in-one machine, an MR head-mounted all-in-one machine, smart glasses, and a wearable speaker.

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