Audio equipment

Abstract

The present invention provides an acoustic equipment that has a suppression effect on sound waves emitted by near-field sound sources within a specified range and an amplification effect on sound waves emitted by far-field sound sources outside the specified range, the acoustic equipment including: a first acoustic wave sensor that receives sound waves and outputs a first signal based on the sound waves; a second acoustic wave sensor that receives the sound waves and outputs a second signal based on the sound waves; and a signal processing circuit connected to the first and second acoustic wave sensors that generates an output signal based on the first and second signals, wherein the acoustic equipment has a target near-field sensitivity to sound waves emitted from a target near-field sound source (target near-field sound waves) that is significantly lower than a target far-field sensitivity to sound waves emitted from a target far-field sound source (target far-field sound waves).

Description

[Technical field]

[0001] The present invention relates to a sound collection facility, and more particularly to an audio facility with a sound transmission function. [Background technology]

[0002] As for some audio equipment with a voice transmission function, for example, in the case of a microphone module, there are various demands for the effect of voice transmission for near-field sound sources and far-field sound sources. For example, when making a phone call, in many cases, it is preferable to amplify the voice of the user who is closer to the mobile phone and suppress the surrounding sounds at the same time, so that the voice of the mobile phone user can be more easily heard by the other party. Meanwhile, in some application scenarios, it is preferable for the audio equipment to lower the sensitivity to near-field sound sources and increase the sensitivity to far-field sound sources.

[0003] For example, in the case of hearing aids, users no longer simply want their hearing aids to "pick up sound," but to be able to hear the conversations of people around them more easily and to understand the content of those conversations more clearly. One of the decisive factors that influences the speech discrimination rate is the ratio of the target speech to the interfering speech in the speech signal. The lower the ratio of the interfering speech in the speech signal, the easier it is to understand the target speech.

[0004] However, the amplification effect of a typical hearing aid is not selective, that is, the target sound signal (far-field sound source) is amplified while the user's own sound signal (near-field sound source) is also amplified. Generally, if the user's sound source is closer to the hearing aid than the conversation partner, the user's voice intensity will be higher than the conversation partner's voice intensity when the hearing aid is used. Therefore, the user's own sound signal will become noise, which will reduce the discrimination of the target conversation partner's voice, and will have a negative impact on communication and the hearing aid experience. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, new audio equipment is expected to have a sound transmission function that can suppress near-field sound source signals while simultaneously amplifying far-field sound source signals. [Means for solving the problem]

[0006] The following presents a simplified summary of the present invention in order to provide a basic understanding of some aspects of the present invention. It should be understood that the above description is not intended to identify key parts or important portions of the present invention, nor is it intended to limit the scope of the present invention. The above description is merely intended to present some concepts of the present invention in a simplified form. Further details regarding the present invention are described in detail in other parts of this disclosure.

[0007] The present invention provides an audio equipment with a voice transmission function, the audio equipment including a first audio sensor that receives an audio wave and outputs a first signal based on the audio wave, a second audio sensor that receives the audio wave and outputs a second signal based on the audio wave, and a signal processing circuit that connects the first audio sensor and the second audio sensor and generates an output signal based on the first signal and the second signal. The audio equipment is characterized in that the target near-field sensitivity of the audio wave (target near-field audio wave) emitted by the audio equipment to a target near-field sound source is significantly lower than the far-field sensitivity of the audio wave (far-field audio wave) emitted to a far-field, and a second target distance, which is the distance between the target near-field sound source and the first audio sensor, is shorter than a first target distance, which is the distance between the far-field sound source and the first audio sensor.

[0008] In some embodiments, the near-field sensitivity is significantly lower than the far-field sensitivity means that the ratio of the target near-field sensitivity to the far-field sensitivity is lower than a predetermined value.

[0009] In some embodiments, the first sonic sensor includes a first microphone, the second sonic sensor includes a second microphone, and a distance from the first microphone to the second microphone is a predetermined distance.

[0010] In some embodiments, the position of the target near-field sound source causes the absolute value of the sound pressure amplitude gradient of the target near-field sound wave between the first microphone and the second microphone to be above a first sound pressure threshold, and the position of the target far-field sound source causes the absolute value of the sound pressure amplitude gradient of the target far-field sound wave between the first microphone and the second microphone to be below a second sound pressure threshold.

[0011] In some embodiments, the acoustic equipment further includes an electronic device, the first acoustic sensor and the second acoustic sensor are attached to the electronic device, and when the electronic device is in operation, a spatial attitude relationship between the position of the target near-field sound source and the electronic device is fixed, the first acoustic sensor has a first distance from the position of the target near-field sound source, and the second acoustic sensor has a second distance from the position of the target near-field sound source.

[0012] In some embodiments, a sensitivity of the first sonic sensor is a first sensitivity and a sensitivity of the second sonic sensor is a second sensitivity, the first sensitivity and the second sensitivity being determined by a ratio of the first distance and the second distance. In some embodiments, the first sonic sensor has a first sensitivity and the second sonic sensor has a second sensitivity, and the first sensitivity and the second sensitivity are the same.

[0013] In some embodiments, the second sonic sensor further includes an amplitude adjustment circuit configured to amplitude adjust an initial second signal output to the second sonic sensor to output the second signal based on a ratio of the first distance and the second distance. In some embodiments, the electronic device further comprises an apply button, the apply button being arranged to activate the amplitude adjustment circuitry when pressed.

[0014] In some embodiments, while the audio equipment is in operation, an amplitude adjustment width of the amplitude adjustment circuit is adjusted to change in real time based on dynamic changes in the first distance and the second distance.

[0015] In some embodiments, the first acoustic sensor includes a phase adjustment circuit configured to phase adjust an initial first signal output to the first acoustic sensor to generate the first signal based on a difference in value between the first distance and the second distance.

[0016] In some embodiments, the signal processing circuitry includes a differential circuit.

[0017] In some embodiments, the audio equipment further includes a signal amplification circuit that amplifies the output signal of the differential circuit before generating the output signal of the audio equipment.

[0018] In some embodiments, the preset distance between the second sonic sensor and the first sonic sensor is adjustable.

[0019] In some embodiments, the electronic device comprises a head-mounted electronic device. In some embodiments, the head mounted electronic device comprises at least one hearing aid, the at least one hearing aid comprises at least one earphone, and at least a portion of the first acoustic sensor and at least a portion of the second acoustic sensor are located within the at least one earphone.

[0020] In some embodiments, each of the at least one earphone includes at least one signal converter, each of the at least one signal converter configured to receive the output signal from the signal processing circuit and output an audio signal for transmission via air.

[0021] In some embodiments, each of the at least one earphone includes at least one signal converter, each of the at least one signal converter being arranged to receive the output signal from the signal processing circuit and output a bone conduction audio signal.

[0022] In some embodiments, the electronic device includes a speaker, and the mounting location of the speaker is the location of the target near-field sound source.

[0023] In some embodiments, the first signal includes n first sub-signals, the second signal includes n second sub-signals, the i-th first sub-signal and the i-th second sub-signal correspond to the same frequency band, n is a positive integer greater than 1, and i is any integer from 1 to n, and the signal conditioning circuit is configured to process the first sub-signals and second sub-signals having the same number before combining them into the output signal.

[0024] The following drawings are provided to illustrate exemplary embodiments of the present invention in detail. It will be understood by those skilled in the art that these embodiments are illustrative and not restrictive, that the drawings are not intended to limit what the present invention is intended to disclose, but are presented for the purpose of illustration and explanation only, and that what the present invention is intended to accomplish may be accomplished by other embodiments. It will be understood that the drawings are not necessarily drawn to scale. [Brief description of the drawings]

[0025] [Figure 1] 1 is a diagram showing an application scenario of an audio equipment having a sound transmission function in some embodiments of the present invention. [Diagram 2] FIG. 1 illustrates an audio system with audio transmission capabilities in accordance with some embodiments of the present invention. [Diagram 3] 1 is a diagram showing the principle by which an audio device having a sound transmission function in some embodiments of the present invention suppresses a near-field sound source. [Figure 4] FIG. 1 illustrates an audio system including an amplitude adjustment circuit according to some embodiments of the present invention. [Diagram 5] FIG. 1 illustrates an audio system including a signal amplification circuit according to some embodiments of the present invention. [Figure 6]FIG. 1 illustrates an audio system including a phase adjustment circuit according to some embodiments of the present invention. [Figure 7] FIG. 2 illustrates an audio installation including a sub-band decomposition module according to some embodiments of the present invention. [Figure 8A] FIG. 2 is a diagram illustrating the response of an acoustic system in some embodiments of the present invention to the direction of a target near-field sound source and a target far-field sound source. [Figure 8B] 1 illustrates the response of an acoustic installation in accordance with some embodiments of the present invention to the direction of a target near-field sound source and a target far-field sound source; [Figure 9A] 4A to 4C show frequency responses at 0° direction of the audio equipment in different embodiments. [Figure 9B] 4A to 4C show frequency responses at 0° direction of the audio equipment in different embodiments. [Figure 9C] 4A to 4C show frequency responses at 0° direction of the audio equipment in different embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The present invention discloses an audio equipment with a sound transmission function, which has a suppression effect on sound waves emitted by a near-field sound source within a specified range and an amplification effect on sound waves emitted by a far-field sound source other than the specified near-field sound source.

[0027] In the following description, specific application scenarios and requirements of the present invention are presented, and the contents are intended to enable those skilled in the art to make and use the contents of the present invention. It is expected that the present disclosure will significantly improve the operation and function of the parts related to these and other features and structures, and the combination and economy of manufacture of the parts. All contents referred to in the drawings are recognized as part of this disclosure. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of the present disclosure. Various modifications to the disclosed embodiments may become apparent to those skilled in the art, and the general principles of the present disclosure may be applied to other embodiments without departing from the scope or spirit of the present invention. Therefore, the present invention is not limited to the illustrated embodiments, but is to be accorded the widest scope consistent with the claims.

[0028] FIG. 1 illustrates an application scenario illustrated in some embodiments of the audio equipment 100 of the present invention. The audio equipment 100 may include one or more of an acoustic sensor 110, a signal processing circuit 120, and a signal converter 130. For example, the acoustic sensor 110 may be one or more microphone groups. The signal converter 130 may be a speaker with a specific function. The signal processing circuit 120 may include one or more electric elements, electronic circuits, and / or hardware modules. The one or more electric elements, electronic circuits, and / or hardware modules may process the signal generated by the acoustic sensor 100 and transmit the processed signal to the signal converter 130 for further conversion into sound.

[0029] The audio equipment 100 may include only the sonic sensor 110. For example, the audio equipment 100 may be simply one or more microphone groups. The audio equipment 100 may include the sonic sensor 110, the signal processing circuit 120, and the signal converter 130 at the same time. For example, the audio equipment 100 may be an electronic device equipped with the microphone group. For example, the electronic device may include, but is not limited to, a hearing aid 100-1, a smart TV 100-2, a smart audio 100-3, and other smart audio equipment. These smart audio equipment 100 can collect sounds from the surrounding environment and perform specific operations by identifying specific sounds from the environmental sounds. For example, the smart TV 100-2 and the smart audio 100-3 can collect and identify human voices, and further recognize commands from the human voices to execute programs inside the smart TV 100-2 and the smart audio 100-3. For example, the smart audio 100-3 can collect human voices, recognize song reservation registration requests from the human voices, and further play the corresponding songs.

[0030] Further, for example, the smart audio equipment 100 may have a specific sensitivity to sounds from a specific location, i.e., the sensitivity to sounds originating from the specific location may be very high or very low. In some embodiments, the sonic sensor 110 mounted on the equipment 100 may respond with different sensitivities to sound source signals from different distances. In FIG. 1, the near-field sound source 140 is closer to the equipment 100 than the far-field sound source 150. Both the sound signal originating from the near-field sound source 140 and the sound signal originating from the far-field sound source 150 may be collected and / or converted into an electrical signal by the audio equipment 100. The sensitivity of the audio equipment 100 to an audio signal may refer to the ratio between the power of the output electrical signal and the power of the received audio signal. The higher the sensitivity, the higher the output value of the electrical signal converted from the sound source signal of unit output by the audio equipment 100. In an embodiment of the present invention, when sounds simultaneously generated from the near-field sound source 140 and the far-field sound source 150 have the same power when they reach the audio equipment 100, the sensitivity of the audio equipment 100 to the far-field sound source 150 is significantly higher than the sensitivity to the near-field sound source 140. This also means that when sounds simultaneously generated from the near-field sound source 140 and the far-field sound source 150 have the same power when they reach the audio equipment 100, among the electrical signals output by the audio equipment 100, the signal power of a portion related to the far-field sound source 150 is significantly higher than the signal power of a portion related to the near-field sound source 140. By appropriately setting the sensitivity of each of the near-field sound source 140 and the far-field sound source 150, the audio equipment 100 can achieve the purpose of amplifying the far-field signal while suppressing the near-field signal.

[0031] When the acoustic equipment 100 is installed in a hearing aid 100-1, the near-field sound source 140 may be the vocal cords of a person wearing the hearing aid 100-1, and the position of the near-field sound source 140 may be the position of the vocal cords. The far-field sound source 150 may be a sound source in the surrounding environment, for example the vocal cords of people around the wearer. In this case, the voice of the hearing aid wearer himself is suppressed and sound sources in the surrounding environment, including the voices of other people, are amplified, so that the hearing aid wearer can more easily recognize the surrounding environmental sounds and the voices of other people.

[0032] FIG. 2 shows one embodiment of the audio equipment of the present invention. The audio equipment may include a base 200. Each component of the audio equipment 100 may be placed and further arranged on the base 200. The base 200 may be provided on the audio equipment 100 and may be connected to other components of the equipment 100 through one or more interfaces (not shown). The one or more interfaces may be used for power supply, data exchange, signal input / output, or similar purposes. For example, the audio equipment 100 may be connected to an external power source and be powered, or may have its own power supply. For example, the audio equipment 100 may collect an audio signal and then output an electrical signal, which may be sent to the other components of the equipment 100 through one or more interfaces for subsequent processing.

[0033] A first sonic sensor module 210 and a second sonic sensor module 220 may be fixedly mounted on the base 200. The first sonic sensor module 210 may include a first sonic sensor (an array of one or more sonic sensors) 211. In some embodiments, the first sonic sensor module 210 may further include other electrical elements, such as a power amplifier circuit, electrically connected to the first sonic sensor module 210. The first sonic sensor 211 may be arranged to receive an acoustic wave and generate a first initial signal. The other electrical elements receive and process the first initial signal so that the first initial signal becomes a first signal. The first initial signal and the first signal are both electrical signals. When the first sonic sensor module 210 does not include other electrical elements other than the first sonic sensor 211, the first signal is the first initial signal. When the first sonic sensor module 210 also includes other electrical elements, the first signal may be a signal that is processed by the other electrical elements and output from the first initial signal.

[0034] The second sonic sensor module 220 can have the same or similar structure as the first sonic sensor module 210. For example, the second sonic sensor module 220 can include a second sonic sensor (or an array of one or more sonic sensors) 221 to receive and output a second initial signal. Similar to the first sonic sensor module 210, the second sonic sensor module 220 can include other circuit components to receive and further process the second initial signal into a second signal. The other circuit components can include, but are not limited to, a power amplifier circuit. In some embodiments, the first sonic sensor 211 can include at least one microphone referred to as the first microphone. The second sonic sensor 221 can include at least one microphone referred to as the second microphone. The first microphone and the second microphone are positioned to receive, detect and / or collect sound waves.

[0035] The first sonic sensor 211 and the second sonic sensor 221 may be fixed to the base 200 with a fixed distance between them. In some embodiments, the distance between the two arrays may be a fixed value, a first predetermined value, i.e., a predetermined distance. In other scenarios, the distance between the first sonic sensor 211 and the second sonic sensor 221 is adjustable.

[0036] The audio equipment 100 may further include a signal processing circuit 250. The signal processing circuit 250 may be fixed to the base 200. In an embodiment of the present invention, the signal processing circuit 250 can receive the first signal output by the first sonic sensor module 210 and the second signal output by the second sonic sensor module 220, and generate an output signal of the audio equipment 100 using the first signal and the second signal. The signal processing circuit 250 can also output the output signal. The first signal output by the first sonic sensor module 210 can be transmitted to the signal processing circuit 250 through the circuit 230, and the second signal output by the second sonic sensor module 220 can be transmitted to the signal processing circuit 250 through the circuit 230. The signal processing circuit 250 can transmit the output signal to the outside using the circuit 260, for example, to other electronic components of the equipment 100 through an interface.

[0037] When the surrounding environment in which the audio equipment 100 is placed has a plurality of sound sources generating sounds, both the first acoustic sensor 211 and the second acoustic sensor 221 can receive those sounds. For example, the plurality of sound sources may include a target near-field sound wave generated by a target near-field sound source and a target far-field sound wave generated by a target far-field sound source. For example, the target near-field sound source may be the vocal cords of the hearing aid wearer, that is, a near-field sound source. The target near-field sound wave may be a voice generated by the hearing aid wearer himself. The target far-field sound source may be one or more third party speakers other than the hearing aid wearer, that is, a far-field sound source. The target far-field sound wave may be a voice generated by a third party speaker. In comparison, after receiving sounds generated from one or more sound sources, the first acoustic sensor module 210 and the second acoustic sensor module 220 may output a first signal and a second signal, respectively. For the sake of convenience, the acoustic equipment 100 disclosed in the present invention is based on one hypothesis in the following description, that is, the target near-field sound waves emitted by the target near-field sound source and the target far-field sound waves emitted by the target far-field sound source are completely identical in spectrum, and the intensity of the sound transmitted to the first acoustic sensor 211 is also the same.

[0038] The first signal and the second signal may include information on one or more sound sources. In the output signal of the audio equipment 100, processed by the signal processing circuit 250, the intensity of the signal corresponding to the target near-field sound wave is significantly lower than the intensity of the signal corresponding to the target far-field sound wave. For example, if the audio equipment 100 is a hearing aid 100-1, the vocal cords of the user who wears it may be the target near-field sound source, and the vocal cords of other people around may be the target far-field sound source. The hearing aid 100-1 amplifies the voice of the user who wears it significantly lower than the amplification of sounds emitted by sound sources around the user who wears it, for example, the voice of a third party speaker. Compared to the target far-field sound source, the target near-field sound source is closer to the audio equipment 100. Therefore, the target near-field sound source may be called a near-field sound source, and the target far-field sound source may be called a far-field sound source. In some embodiments, any sound source within a predetermined range around the first sound wave sensor 211 may be recognized as a target near-field sound source, and any sound source outside the predetermined range may be recognized as a target far-field sound source. In the case of a hearing aid, the predetermined range may be a distance range from the user's vocal cords to the hearing aid, or a range between the user's two ears. For example, the predetermined range may be recognized as a hemisphere range with a radius of any of 10 cm, 11 cm, 12 cm, 13 cm, 14 cm, 15 cm, 16 cm, 17 cm, 18 cm, 19 cm, 20 cm, 21 cm, 22 cm, 23 cm, 24 cm, and 25 cm on the side of the hearing aid facing the ear. The predetermined range may be a distance between the user's two ears. In other words, in the case of a hearing aid, the near-field distance may be recognized as approximately the location of the user's head or vocal cords relative to the hearing aid.

[0039] Therefore, the target near-field sound source is within a predetermined range, and the target far-field sound source is outside the predetermined range. The distance from the target far-field sound source to the acoustic equipment 100 (first target distance) is greater than the distance from the target near-field sound source to the acoustic equipment 100 (second target distance). For example, the first target distance can refer to the distance between the target far-field sound source and the first acoustic sensor. The second target distance can refer to the distance between the target near-field sound source and the first acoustic sensor.

[0040] In some embodiments, the signal processing circuit 250 can include a differential circuit. The first signal and the second signal are converted into an output signal through the differential circuit. The differential circuit can realize that the sensitivity of the acoustic equipment 100 to the target near-field sound wave from the target near-field sound source is significantly lower than the sensitivity to the target far-field sound wave from the target far-field sound source. For example, the ratio of the sensitivity of the acoustic equipment 100 to the target far-field sound wave and the sensitivity to the target near-field sound wave is greater than a threshold value. The threshold value can be 2, 3, 4, 5, 6, 7, 8, 9, 10, etc. The specific possible value can be selected based on the needs and experience of the experimental application scenario. For a detailed and theoretical description of the acoustic equipment 100, please refer to FIG. 3 and the description thereof.

[0041] Fig. 3 shows the principle of near-field sound source signal suppression in the acoustic equipment of the present invention. In Fig. 3, the distance between the first sound wave sensor 211 and the second sound wave sensor 221 is d. When sound waves are emitted from the same sound source, the amplitude and phase when they reach the first sound wave sensor 211 are different from the amplitude and phase when they reach the second sound wave sensor 221.

[0042] The target far-field sound source is outside the expected range, that is, the distance between the target far-field 150 and either of the two arrays is also far enough, that is, R>>d, where R indicates the distance from the target far-field 150 to the acoustic equipment 100. At this time, the wavefront of the target far-field sound wave of the target far-field sound source 150 when it reaches the acoustic equipment 100 is closer to a flat surface than the target near-field sound wave emitted from the target near-field sound source 140. Therefore, the sound pressure amplitude of the target far-field sound wave at the first acoustic wave sensor 211 is substantially the same as that at the second acoustic wave sensor 221.

[0043] In some embodiments, the position of the target near-field sound source 140 must satisfy a first constraint, and the position of the target far-field sound source 150 must satisfy a second constraint. The first constraint indicates that the absolute value of the sound pressure amplitude gradient between the first sound wave sensor 211 and the second sound wave sensor 221 of the target near-field sound wave emitted by the target near-field sound source 140 is greater than a first sound pressure threshold. The second constraint indicates that the absolute value of the sound pressure amplitude gradient between the first sound wave sensor 211 and the second sound wave sensor 221 of the target far-field sound source 150 is less than a second sound pressure threshold. Since there is a positive correlation between the sound pressure amplitude gradient and the distance between the sound source and the survey point, and the position of the near-field sound source needs to be determined empirically with reference to the specific application scenario and the expected results, the sound pressure threshold can have a one-to-one correspondence with the near-field sound source and the far-field sound source according to the definition of distance.

[0044] The target near-field sound source is located within the predetermined range and is closer to the acoustic equipment 100. Compared with the target far-field sound wave generated by the target far-field sound source 120, the wavefront of the target near-field sound wave generated by the target near-field sound source 140 when it reaches the acoustic equipment 100 is closer to a spherical shape. Therefore, the sound pressure amplitude value is gradually attenuated as the transmission distance of the target near-field sound wave increases. Let PS be the sound pressure at the target far-field sound source 150 or the target near-field sound source 140, P1 be the sound pressure formed by the first acoustic sensor 211, and P2 be the sound pressure formed by the second acoustic sensor 221. Let θ be the angle between the target near-field sound source 140 and the first acoustic sensor 211. The angle θ is defined as the angle between the axis oriented from the second sensor array to the first sensor array and the axis oriented from the reference sound source 120 to the first sensor array 211. Similarly, let the angle between the target far-field sound source 150 and the first sonic sensor 211 be α. Let the distance from the target near-field sound source 140 to the first sonic sensor 211 be r1, and the distance from the target near-field sound source 140 to the second sonic sensor 221 be r2.

[0045] Therefore, the sound pressure amplitude value that the target far field 150 creates for the two arrays can be expressed as:

number

[0046] The sound pressure amplitude value that the target near field 140 creates at the two arrays can be expressed as follows:

number

[0047] The sound waves emitted by the target far-field 150 and the target near-field 140 arrive at the two arrays with a phase difference that is related to the angular frequency ω of the source signal and the distance d between the two arrays. Let the speed of sound be c, then: The target far-field sound wave has a phase difference at the two arrays of:

number

number

[0048] Therefore, when the frequency of the target near-field sound source 140 or the target far-field sound source 150 is relatively small, the phase difference when the corresponding target near-field sound wave or the target far-field sound wave arrives at the two arrays is low and can be completely ignored. When the acoustic equipment 100 is installed in the hearing aid 100-1, the target near-field sound source 140 is the vocal cords of the user who wears the hearing aid. For a typical adult male, the fundamental frequency is 85-180Hz, and for a typical adult female, the fundamental frequency is 165-255Hz. Since the frequency of the human voice is relatively low, the phase difference of the sound wave of the human voice at the two arrays is also low and can be completely ignored.

[0049] In some embodiments, the first sonic sensor 211 and the second sonic sensor 221 have the same sensitivity (the sensitivity of an array is the ratio of the energy amplitude of the output electrical signal to the energy amplitude of the received sonic signal). The first sonic sensor 211 and the second sonic sensor 221 convert the target near-field sonic wave into an electrical signal, respectively. If the phase difference is not taken into account, the amplitudes of the sonic signals received by the first sonic sensor 211 and the second sonic sensor 221 are different, so the amplitudes of the two electrical signals are also different.

[0050] In the embodiment shown in Fig. 3, since the target near-field sound source 140 is closer to the first acoustic wave sensor 211, the target near-field sound source has a shape closer to a spherical wave between the first acoustic wave sensor 211 and the second acoustic wave sensor 221. Therefore, the amplitude (also called intensity) of the first initial signal converted by the first acoustic wave sensor 211 in response to the sound wave of the target near-field sound source 140 is larger than the amplitude of the second initial signal output by the second acoustic wave sensor 221. If the first acoustic wave sensor module 210 and the second acoustic wave sensor module 220 do not include other electric elements, the first initial signal is the first signal, and the second initial signal is the second signal, which are further sent to the signal processing circuit 250. If the signal processing circuit 250 includes a differential circuit, the difference between the first signal and the second signal is calculated. The difference between the first signal and the second signal corresponds to the target near-field sound wave as the output signal.

[0051] Compared with the target near-field sound source 140, the target far-field sound source 150 is farther away from the first sound wave sensor 211, so the target far-field sound wave has a shape closer to a plane wave between the first sound wave sensor 211 and the second sound wave sensor 221. After the sound conducting device 100 receives and / or senses and / or collects the target far-field sound wave, the amplitudes of the sound pressure have values ​​close to or the same as each other at the first sound wave sensor 211 and the second sound wave sensor 221. Therefore, the first signal and the second signal will be nearly cancelled out when subtracted by the differential circuit.

[0052] One of the objectives of the present invention is to suppress the intensity of the signal corresponding to the target near-field 140 in the output signal, and amplify the intensity of the signal corresponding to the target far-field 150. Therefore, by making some adjustments to the first acoustic sensor module 210 and / or the second acoustic sensor module 220, when the audio equipment 100 responds to the target near-field sound source 140, the amplitudes of the first signal and the second signal have sufficiently similar values, so that the output signal can be significantly reduced or completely eliminated by processing the differential circuit. When the audio equipment 100 responds to the target far-field sound source 150, the difference in the amplitudes of the first signal and the second signal increases, so that the intensity of the corresponding output signal after passing through the differential circuit can be increased. Some of the following embodiments can adjust the electronic circuit structure of the audio equipment 100 according to the above-mentioned contents. In some embodiments, adjustments to the electronic circuitry of the audio equipment 100 can include adjusting the sensitivity of the first acoustic sensor module 210 and / or the second acoustic sensor module 220. For example, in the embodiment shown in Figure 3, by increasing the sensitivity of the second acoustic sensor module 220, the amplitudes of the first and second signals when the audio equipment 100 interrogates the target near-field sound source 140 can be made to be the same or close to each other, thereby reducing or eliminating the output signal that is cancelled in the differential circuit.

[0053] It is recognized that increasing the sensitivity of the second acoustic sensor module 220 is just one of the means of adjusting the electronic circuit structure of the audio equipment 100, and when the target near-field sound source 140 is located on the left side of the audio equipment 100 in Fig. 3, the same purpose can be achieved by decreasing the sensitivity of the second acoustic sensor module 220. Thus, the same purpose can also be achieved by simultaneously adjusting the sensitivities of the first acoustic sensor module 210 and the second acoustic sensor module 220, for example, increasing the sensitivity of the first acoustic sensor module 210 while decreasing the sensitivity of the second acoustic sensor module 220.

[0054] When the sensitivity of the second acoustic wave module 220 is increased, when the audio equipment 100 responds with a target far-field acoustic wave, the corresponding second signal is amplified to increase the difference with the first signal, and the output signal is amplified after processing by the differential circuit.

[0055] The coefficient B can be used to represent the sensitivity adjustment range of the second sonic sensor module 220. In the scenario shown in Fig. 3, the coefficient B can represent the amplification degree for the sensitivity of the second sonic sensor module 220. When the sensitivity of the first sonic sensor 211 and the second sonic sensor 221 are the same, the acoustic equipment 100 responds to the target near-field sound source 140, and B is

number

number

number

[0056] The operation principle of the acoustic equipment 100 will be described below by taking the target near-field signal as an example to be completely cancelled. If the target near-field sound source 140 or the target far-field sound source 150 is S(ω) and the frequency is k=ω / c, the output signal J OUTPUT , Y OUTPUT The process of estimating is as follows: a) When the acoustic equipment 100 responds with a target near-field acoustic wave, the first initial signal of the first acoustic wave sensor 211 is

number

number

number

number

number

number

number

number

[0057] It can be seen from the above that when the frequency of the sound source signal is low, the first signal when the first sound wave sensor module 210 responds with the target near-field sound wave and the second signal when the second sound wave sensor module 220 responds with the target far-field sound wave can be made to be the same or close to zero by adjusting the coefficient B. Therefore, the output signal of the audio equipment 100 is 0 or close to 0. The amplitude of the first signal when the first sound wave sensor module 210 responds with the target far-field sound wave has a relatively large difference with the amplitude of the second signal when the second sound wave sensor module 220 responds with the target near-field sound wave. Therefore, the output signal of the audio equipment 100 is not 0. On the other hand, the sensitivity of the audio equipment 100 to the target near-field sound wave generated from the target near-field sound source 140 is significantly lower than the sensitivity to the target far-field sound wave generated from the target far-field sound source 150.

[0058] In some embodiments, the coefficient B can be adjusted within a preset range, and when the coefficient B is adjusted within this range, the sensitivity of the acoustic equipment 100 to the target near-field sound source generated by the target near-field sound source 140 is significantly lower than the sensitivity to the target far-field sound wave generated by the target far-field sound source 150, which can be expressed as follows: for a target near-field sound wave whose power is A0 at the target near-field sound source 140, the corresponding first signal power is B1, and the corresponding second signal power is B2. For a target far-field sound wave whose power is A0' at the target far-field sound source 150, the corresponding first signal power is B1', and the corresponding second signal power is B2'. When the coefficient B is adjusted within the allowable range, (A0'|B1-B2|) / (A0|B1'-B2'|) is less than the signal threshold. The signal threshold may be preset, and the value represents the degree to which the acoustic equipment 100 suppresses the target near-field sound wave.

[0059] There are several ways to adjust the coefficient B. One adjustment method is to adjust the sensitivity of the first sonic sensor 211 and / or the second sonic sensor 221 (here, it is assumed that the sensitivities of the two arrays are originally the same). If the first sonic sensor module 210 and the second sonic sensor module 220 do not include any electronic elements other than the first sonic sensor 211 and the second sonic sensor 221, the first initial signal is the first signal, and the second initial signal is the second signal. Taking FIG. 3 as an example, amplifying the sensitivity of the second sonic sensor 221 can increase the amplitude of the second signal. The range in which the sensitivity of the second sonic sensor 221 is amplified can be based on the allowable range of the coefficient B. For example, if the purpose of the acoustic equipment 100 is to completely suppress the signal of the target near-field sound source 140, the value of the coefficient B is

number

[0060] In the acoustic equipment 100 shown in Fig. 3, the adjustment of the sensitivity of the second acoustic sensor 221 is determined by increasing or decreasing the sensitivity of the second acoustic sensor 221 according to the positional relationship between the acoustic equipment 100 and the target near-field sound source 140. When the target near-field sound source 140 in Fig. 3 is on the left side of the acoustic equipment 100, the sensitivity of the second acoustic sensor 221 is decreased in order for the acoustic equipment 100 to suppress the target near-field sound source 140. When the target near-field sound source 140 in Fig. 3 is on the right side of the acoustic equipment 100, the sensitivity of the second acoustic sensor 221 is decreased in order for the acoustic equipment 100 to suppress the target near-field sound source 140. It should be understood by those skilled in the art that adjusting the sensitivity of the second acoustic sensor 221 is essentially adjusting the interrelationship between the output signal widths when the first acoustic sensor 211 and the second acoustic sensor 221 respectively respond to the target sound wave. For example, the same effect can be achieved by decreasing the sensitivity of the first sonic sensor 211 while increasing the sensitivity of the second sonic sensor 221, or by decreasing the sensitivity of the first sonic sensor 211 while increasing the sensitivity of the second sonic sensor 221.

[0061] FIG. 4 shows an embodiment of the acoustic equipment including the amplitude adjustment circuit of the present invention. FIG. 4 shows another method for adjusting the coefficient B. When the sensitivity of the first acoustic sensor 211 and the second acoustic sensor 221 is the same, the method for adjusting the coefficient B also includes adding an amplitude adjustment circuit to the first acoustic sensor module 210 and / or the second acoustic sensor module 220. Taking the embodiment shown in FIG. 4 as an example, the second acoustic sensor module 220 may include an amplitude adjustment circuit 222 connected after the second acoustic sensor 221. The second initial signal output by the second acoustic sensor 221 can be output as a second signal after its signal amplitude is adjusted through the amplitude adjustment circuit 222. The amplitude adjustment circuit 222 can adjust the adjustment width (i.e., the coefficient B) of the second initial signal according to the distance between the target near-field sound source 140 and the two arrays. For example, when the acoustic equipment 100 is arranged to eliminate the response to the target near-field sound wave, the adjustment width B is

number

number

[0062] The adjustments made to the second initial signal by the amplitude adjustment circuit 222 can include or introduce signal width gain and signal width reduction. In FIG. 4, when the target near-field sound source 140 is on the left side of the audio installation 100, the amplitude adjustment circuit 222 needs to reduce the width of the second signal so that the generated second signal can match the first signal.

[0063] In some embodiments, the adjustment width B of the amplitude adjustment circuit 222 can be dynamically changed / adjusted. For example, in a non-hearing aid use scenario, the position of the target near-field sound source 140 can be dynamically changed, and the distance between the two arrays can also be dynamically changed. If the goal is to completely cancel the target near-field sound wave, the value of the adjustment width B is

number

[0064] In some embodiments, the amplitude adjustment circuit 222 can be installed inside the first sonic sensor module 210, or can be installed inside both the first sonic sensor module 210 and the second sonic sensor module 220 at the same time. The width adjustment principle is the same as that of the embodiment shown in Figure 4. In some embodiments, the amplitude adjustment circuit 222 can exist independently of the first sonic sensor module 210 and / or the second sonic sensor module 220.

[0065] FIG. 5 shows an embodiment of an audio equipment including a signal amplification circuit according to the present invention. In an audio equipment that suppresses a near-field signal source, a signal differential processing is performed on the first signal and the second signal, resulting in an overall reduction in signal amplitude, including an output signal corresponding to a target near-field sound wave and an output signal corresponding to a target far-field sound wave. To compensate for the signal loss, the audio equipment 100 further includes a signal amplification circuit 270. The signal amplification circuit 270 can be connected after the signal processing circuit 250 (e.g., including a differential circuit) to amplify the signal generated by the signal processing circuit 250. Also, by connecting the signal amplification circuit 270 after the differential circuit, the audio equipment 100 can increase the sensitivity to the target far-field sound source 150. When the audio equipment 100 is applied to the hearing aid 100-1, the wearer can hear sounds from a more distant place. In some embodiments, the signal amplification circuit 270 may be integrated with the signal processing circuit 250 or may be installed as a part thereof. In some embodiments, the signal amplification circuit 270 exists independently of the signal processing circuit 250. In some embodiments, signal amplification circuitry may be connected prior to signal processing circuitry 250 and may be located within each of circuits 230 and 240 .

[0066] FIG. 6 shows an embodiment of the audio equipment including a phase adjustment circuit in the present invention. According to the above analysis, when the frequency of the sound source is low, such as when it is not a human voice, the effect of the phase difference cannot be ignored. However, in order to increase the application scenario of the audio equipment 100, the phase difference when the target near-field sound wave reaches the first acoustic wave sensor 211 and the second acoustic wave sensor 221 can be reduced or eliminated by adding a phase adjustment circuit to the first acoustic wave sensor module 210 and / or the second acoustic wave sensor module 220. Take FIG. 6 as an example, the first acoustic wave sensor module 210 includes a phase adjustment circuit 212, which is connected between the first acoustic wave sensor 211 and the signal processing circuit 250.

[0067] The time when the target near-field sound wave of the target near-field sound source 140 reaches the first sound wave sensor 211 is longer than the time when the target near-field sound wave reaches the second sound wave sensor 221.

number

[0068] In some embodiments, the phase adjustment circuit 212 can adjust the delay of the first initial signal to about T seconds so that the acoustic installation 100 can achieve incomplete suppression of the response output by the target near-field acoustic wave and partially withhold the response to the target near-field acoustic wave. In some embodiments, the phase adjustment circuit 212 can be installed inside the first acoustic sensor module 210, or can be installed inside the first acoustic sensor module 210 and the second acoustic sensor module 220 at the same time. In some embodiments, the phase adjustment circuit 212 can exist independently of the first acoustic sensor module 210 and / or the second acoustic sensor module 220.

[0069] FIG. 7 shows an embodiment of an audio equipment including a sub-band decomposition module of the present invention. In FIG. 6, when the phase adjustment circuit 212 is added to delay the first initial signal by T seconds before outputting, the output signal responding to the target near-field sound wave is completely cancelled. In the case where it is not necessary to completely cancel some of the target near-field sound source 140 signals, the phase adjustment circuit 212 can delay the first initial signal slightly longer or shorter than T seconds. In this case, the phase adjustment circuit 212 can provide different delay times for target near-field sound waves with different frequencies. Since the speed at which sound travels through the air is constant and has no relation to frequency, the time difference Δt between the high and low frequency signals of the target near-field sound wave reaching the two arrays is constant. Since the phase difference is ΔΦ=ω*Δt, it can be seen that as the signal frequency increases, the phase difference between the first and second sonic sensors 211 and 221 responding to the target near-field sound wave gradually increases, and the difference in the values ​​of the corresponding first and second signals also gradually increases, so that the suppression effect on the target near-field sound source 140 is affected. Therefore, in order to obtain a balanced frequency response, the first acoustic sensor module 210 and the second acoustic sensor module 220 can be added with a subband decomposition module, which decomposes the first primary signal and the second primary signal into several subbands and further applies an independent phase adjustment circuit to each of them, thereby ensuring that the phase difference of the output signals of the two arrays for each band is the same.

[0070] In the embodiment shown in FIG. 7, the first sonic sensor module 210 includes a sub-band module 213 for decomposing the first initial signal output by the first sonic sensor 211 into several bands. Similarly, the sub-band module 223 added to the second sonic sensor module 220 can decompose the second initial signal into several bands in the same manner as the sub-band module 213 decomposes it. In the first sonic sensor module 210, the phase adjustment circuit 212 has a respective phase adjustment sub-circuit for each band, and the multiple phase adjustment sub-circuits can set different delays Tn for the signals of each band independently of each other, where n represents the band number. The amplitude adjustment circuit 222 includes a respective width adjustment sub-circuit for each band, which can adjust the width of the output signal of each band, and the adjusted width value can be the same. The signal processing circuit 250 can include a single differential circuit for each band, and each differential circuit corresponds to a pair of the signals output from the first sonic sensor module 210 and the second sonic sensor module 220 in a certain band. The signal processing circuit 250 may further include a signal synthesis circuit 251 , which synthesizes the output signals of the differential circuits and outputs the result as an output signal for the audio equipment 100 .

[0071] Taking the first ultrasonic sensor 211 as an example, the phase difference of the n-th band is

number

number

number

number

[0072] ΔΦn varies within the range of [0,π], and the smaller the phase difference ΔΦ, the greater the suppression effect of the acoustic equipment 100 on the target near-field sound source 140 signal. For each band, ΔΦn can have different values, and therefore, the different bands correspond to different frequencies, so the corresponding phase adjustment sub-circuits also have different delay times Tn for the signals. This method of separately adjusting the signal delays of different bands can make the suppression effect on the target near-field sound source signal in the output signal uniform for each band.

[0073] Returning to the application scene of the equipment shown in FIG. 1, in addition to being applied to hearing aid 100-1, audio equipment 100 can also be applied to similar head-mounted electronic equipment, such as bone conduction earphones and earphones with other sound collection functions.

[0074] The equipment 110 may be provided with a distance adjustment device for adjusting the distance between the first sound wave sensor 211 and the second sound wave sensor 221, thereby improving the adaptability of the acoustic equipment to different band sound sources.

[0075] The head-mounted electronic device may include an in-ear hearing aid, which may include at least one earphone, in which the audio device 100 may be installed, and the first and second acoustic sensors 211 and 221 are located in the at least one earphone.

[0076] In some embodiments, at least one earphone may include at least one signal converter. The signal converter receives the output signal of the audio equipment 100 (e.g., through an interface installed in the circuit 260 and the base 200) and outputs a signal that can be sensed by the human cochlea. In some embodiments, if the signal that can be sensed by the human cochlea is an audio signal, the signal converter may be a speaker. In some embodiments, if the signal that can be sensed by the human cochlea is a bone conduction signal, the signal converter may convert the electrical signal output by the audio equipment 100 into a vibration signal that can be transmitted to the cochlea through the wearer's facial bones.

[0077] In some embodiments, the device 110 may be provided with an apply button. When the apply button is pressed, the amplitude adjustment circuit 222 may adjust the amplitude adjustment range based on the first initial signal output by the first sound sensor 211 and the second initial signal output by the second sound sensor 221 at the current time (see FIG. 3 and the related description). Taking a hearing aid as an example, the distance between the vocal cords and the ears of different wearers is different, and the ears are usually the position where the hearing aid is worn. If the amplitude adjustment range of the amplitude adjustment circuit 222 cannot be adjusted by the user, the wearer can only adjust the amplitude adjustment range of the amplitude adjustment circuit 222 at the position of his / her vocal cords by having a professional adjust it, which hinders mass production of hearing aids. By providing the apply button, manufacturers can mass-produce hearing aids, and users can also perform the application operation after obtaining the product. For example, a person puts on a hearing aid, presses the apply button, and then speaks in a relatively quiet environment. The sound source position at that time is the position of the wearer's vocal cords. The amplitude adjustment range determined by the amplitude adjustment circuit 222 at this time is for that wearer. When the hearing aid is worn by another wearer, it can be applied in the same way, so that the hearing aid can be shared. Compared with in-ear hearing aids, this application method is particularly suitable for hearing aids that use bone conduction technology. Because in-ear hearing aids need to be customized according to the structure of the human ear canal, it is difficult to share. In comparison, bone conduction hearing aids do not need to be customized according to the structure of the ear canal, so they can be worn by anyone.

[0078] When the audio equipment 100 is applied to smart TV 112 and smart audio 113, these smart equipment usually include a speaker. When a user issues a control command to these smart equipment through a voice command, the device is hindered from recognizing the command issued by the user because the position of the user's sound source is relatively far away and the position of the user's speaker is relatively close. Therefore, by wearing the audio equipment 100, the smart equipment can better recognize human voices from a distant place, and thus the ability to recognize the voice command is improved.

[0079] 8A and 8B show the response of the acoustic equipment 100 of the present invention to the target near-field sound source (near-field) direction and the target far-field (far-field) direction. Taking a hearing aid as an example, the distances r1 and r2 between the wearer's speaking part and the two arrays are determined in advance, and the coefficient B is determined. According to the embodiment shown in FIG. 3, r2 is expressed by the distance between the sound source and the first acoustic wave sensor 211, the distance d between the different arrays, and the angle θ between the sound source and the first acoustic wave sensor:

number

[0080] The suppression effect on the target near-field sound source signal in Figures 8A and 8B is performed under the following conditions: the sound source signal is a pure tone in the frequency range of 0 to 20,000 Hz, the sound pressure at the first acoustic wave sensor 211 of the target near field 140 and the target far field 150 is P1 = 1 Pa, R = 1 m, d = 0.01 m, r1 = 0.1 m, therefore r2 = 0.11 m, B = 1.1.

[0081] The embodiment corresponding to Fig. 8A and Fig. 8B is the embodiment shown in Fig. 4, where the amplitude adjustment circuit 222 only has the function of amplitude gain, and the first acoustic wave sensor module 210 does not have the function of phase adjustment. In Fig. 8A and Fig. 8B, the concentric circles represent the width of the signal, and the width of the output signal increases as it goes outward. In Fig. 8A, when the frequency is relatively low (f = 400Hz or less), the acoustic equipment 100 has a significant suppression effect on all target near-field sound source signals when θ is -90° to 90°. It is recognized that a similar effect may be obtained when the amplitude adjustment circuit reduces the signal when 90° to -90°. In Fig. 8B, the acoustic equipment 100 exerts a smaller suppression effect on the target far-field 150 than on the target near-field 140.

[0082] Figures 9A, 9B and 9C show frequency responses in the 0° direction in different embodiments of the audio equipment of the present invention, where Figure 9A corresponds to the embodiment shown in Figure 3 and Figure 9B corresponds to the embodiment shown in Figure 6. In Figures 8A and 8B, the horizontal axis represents the frequency of the sound source signal, and the vertical axis represents the intensity of the output signal of the audio equipment 100.

[0083] 9A, when the frequency is somewhat low (e.g., below 400 Hz), the response of the acoustic equipment 100 to the target near-field 140 (i.e., the near-field sound source in the figure) is significantly smaller than the response to the target far-field 150 (i.e., the far-field sound source in the figure). That is, the lower the sound source frequency is, the higher the suppression effect of the acoustic equipment 100 on the target near-field sound source signal is.

[0084] In Fig. 9B, the phase adjustment subcircuit can apply different delays to each band, so that the phase difference of each band output signal in the two array modules can be stabilized and does not fluctuate with the change of frequency, so that in Fig. 9B, the audio equipment 100 can maintain the suppression effect on the target near-field sound source signal in a wider frequency range.

[0085] FIG. 9C shows that the audio equipment can adjust the width of the output signals for different bands according to practical needs. By adjusting the delay Tn of a specific band, the phase difference ΔΦ between the two arrays for the signals of different bands can be reduced. 1n , and thus it is possible to change the width of the output signal in different bands. In FIG. 9C, the phase difference in each band from 0 Hz to 1700 Hz and above 2300 Hz is expressed as ΔΦ 1n =π / 1000, and the phase difference at a band of 2000 Hz is ΔΦ 2n = π / 200, and the corresponding band delay is given by the formula T n =r2 / c-r1 / c+(ΔФ n ) / ω n It can be seen that by varying the delay based on demand, we can obtain the desired frequency response curve.

[0086] In summary, those skilled in the art who have read this disclosure in detail will recognize that the above detailed disclosure is merely presented by way of example and is not limiting. Although not expressly mentioned herein, those skilled in the art will understand that this application is intended to include various reasonable changes, adaptations and modifications to the embodiments. These changes, adaptations and modifications are presented in this disclosure and are intended to be within the spirit and scope of the exemplary embodiments of this disclosure.

[0087] The terminology used herein is for the purpose of describing specific exemplary embodiments only and is not intended to be limiting. For example, the singular forms "a", "one", "said" and "the" as used herein may include the plural nuance unless otherwise indicated in the context. As used herein, the terms "comprise", "include" and / or "contain" refer to the presence of associated integers, steps, elements, and / or components, but also to the presence of one or more other features, integers, steps, elements, components, and / or groups, or to the addition of other features, integers, steps, elements, components, and / or groups in the system and / or method. In this description, the term "A is on B" may mean that A and B are directly adjacent (either above or below) or that A and B are indirectly adjacent (i.e., some material is separated between A and B). The term "A is in B" may mean that A is entirely in B or that A is partially in B.

[0088] In addition, some terminology in the present invention has already been applied to describe the embodiments of the present disclosure. For example, "one embodiment", "embodiment" and / or "some embodiments" means that the particular feature, structure or characteristic described in the embodiment can be included in at least one embodiment of the present disclosure. Therefore, it is emphasized or understood that reference to two or more of "embodiment" or "one embodiment" or "alternative embodiment" in each part of the present disclosure is not necessarily reference to the same embodiment. Furthermore, the particular feature, structure or characteristic can be appropriately combined in one or more embodiments of the present disclosure.

[0089] Of course, in the description of the embodiments of the present invention, in order to simplify the disclosure and to facilitate understanding of a feature, various features may sometimes be combined in a single embodiment, drawing, or description. In addition, the present invention may distribute various features across multiple embodiments of the present invention. However, this does not prove that the combination of these features is essential. When interpreting the present invention, a person skilled in the art may extract some of the features and understand them as a single embodiment. In other words, an embodiment of the present invention may be understood as a compilation of multiple secondary embodiments. Moreover, the content of each secondary embodiment may be valid even if it has less than all the features of the single embodiment.

[0090] It will be understood that in some embodiments, numerical values ​​describing or claiming quantities or properties in some implementations of the invention may in some circumstances be modified by terminology such as "about," "approximate," or "essential."

[0091] For example, unless otherwise specified, "about," "approximate," or "basic" can represent a ±20% variation of the recited value. Thus, in some embodiments, the numerical values ​​and parameters set forth in the written description and appended claims may be within the scope of the present invention and may vary depending on the needs and characteristics of the particular implementation. In some embodiments, the numerical values ​​and parameters should be interpreted according to the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding the recitation of broad numerical ranges and parameters that are approximations to describe some embodiments of the present invention, the precise numerical values ​​are provided in the specific examples.

[0092] Each patent, patent application, publication related to a patent application, or other material, such as documents, books, manuals, publications, files, parts, etc., cited herein is hereby incorporated by reference. For this purpose, all contents do not include any prosecution history files related thereto, or any identical prosecution history files having content that is inconsistent or inconsistent with the present invention, or that have the effect of limiting the maximum scope of protection of the claims, which are recognized as being relevant to the present invention, whether now or in the future. For example, the explanations, definitions and / or use of terminology in any included materials shall govern the terminology of the present invention in the event of any inconsistency or discrepancy in the explanations, definitions and / or use of terminology in the present invention.

[0093] Finally, it should be understood that the embodiments disclosed herein are merely illustrative of the principles of the present invention. Other modified embodiments are also within the scope of the present invention. Therefore, the embodiments disclosed herein are merely illustrative and not restrictive. Those skilled in the art can implement the present invention by taking alternative configurations based on the embodiments of the present invention. Therefore, the embodiments of the present invention are not limited to the embodiments precisely described herein. [Explanation of symbols]

[0094] 100 Sound Equipment 110 Sonic Sensor 112 Smart TV 113 Smart Audio 120 Signal Processing Circuit 130 Signal Converter 140 Near-field sound source, target near-field sound source 150 Far-field sound source, target far-field sound source 200 pedestal 210 First Sound Module 210 First acoustic wave sensor module 211 First Sonic Sensor 212 Phase Adjustment Circuit 213 Subband Module 220 Second Sound Module 221 Secondary Sonic Sensor 222 Amplitude adjustment circuit 223 Subband Module 230 circuits 250 Signal Processing Circuit 251 Signal synthesis circuit 260 circuits 270 Signal Amplification Circuit

Claims

1. An audio system for transmitting sound, a first sonic wave sensor that receives sonic waves and outputs a first signal based on the sonic waves; a second sonic sensor that receives the sonic waves and outputs a second signal based on the sonic waves; a signal processing circuit coupled to the first and second sonic sensors for generating an output signal based on the first and second signals; Including, A target near-field sensitivity of the acoustic equipment to a target near-field sound wave emitted by a target near-field sound source is lower than a target far-field sensitivity of the acoustic equipment to a target far-field sound wave emitted by a target far-field sound source; and, a second distance from the target near-field sound source to the first acoustic sensor is shorter than a first distance from the target far-field sound source to the first acoustic sensor; a distance of the first acoustic wave sensor from the target near-field sound source is a first distance, and a distance of the second acoustic wave sensor from the target near-field sound source is a second distance; a sensitivity of the first sonic sensor is a first sensitivity, a sensitivity of the second sonic sensor is a second sensitivity, and 13. An acoustic equipment, characterized in that the first sensitivity and the second sensitivity are determined by a ratio of the first distance to the second distance.

2. 2. The acoustic equipment according to claim 1, wherein the target near-field sensitivity is significantly lower than the far-field sensitivity, in that a ratio of the target near-field sensitivity to the far-field sensitivity is low.

3. The first acoustic sensor includes a first microphone installed on a base of the audio equipment, the second acoustic sensor includes a second microphone mounted on the base; When the acoustic equipment responds to the target near-field acoustic wave, a first difference between an amplitude of the first signal and an amplitude of the second signal is equal to or close to zero.

3. The acoustic system of claim 1 or 2, wherein a second difference between the amplitude of the first signal and the amplitude of the second signal is greater than the first difference when the acoustic system is responsive to a target far-field acoustic wave.

4. the target near-field sound source is positioned such that an absolute value of a sound pressure amplitude gradient of the target near-field sound wave between the first microphone and the second microphone is greater than a first sound pressure threshold; 4. The acoustic equipment according to claim 3, wherein the target far-field sound source is positioned such that an absolute value of a sound pressure amplitude gradient of the target far-field sound wave between the first microphone and the second microphone is smaller than a second sound pressure threshold value.

5. The audio equipment further includes an electronic device; the first sonic sensor and the second sonic sensor are mounted on the electronic device; and 5. The acoustic equipment according to claim 1, wherein while the electronic device is in operation, the position of the target near-field sound source and the spatial orientation of the electronic device have a fixed relationship.

6. a sensitivity of the first sonic sensor is a first sensitivity, a sensitivity of the second sonic sensor is a second sensitivity, and 2. The acoustic equipment according to claim 1, wherein the first sensitivity and the second sensitivity are the same.

7. The second sonic sensor further determines a ratio of the first distance to the second distance, 2. The acoustic equipment according to claim 1, further comprising an amplitude adjustment circuit that adjusts the amplitude of the initial second signal output to the second sound wave sensor so as to generate the second signal.

8. the audio equipment includes an apply button arranged to activate the amplitude adjustment circuit when pressed; and 8. The acoustic equipment according to claim 7, wherein, while the acoustic equipment is in operation, the amplitude adjustment value of the amplitude adjustment circuit changes in real time according to dynamic fluctuations of the first distance and the second distance.

9. The first acoustic sensor detects a difference between the first distance and the second distance.

2. The acoustic equipment according to claim 1, further comprising a phase adjustment circuit that adjusts the phase of the initial first signal output to the first acoustic sensor so as to generate the first signal.

10. the signal processing circuit includes a differential circuit, and 10. The audio installation according to any one of claims 1 to 9, preferably further comprising a signal amplification circuit for amplifying an output signal of the differential circuit to generate an output signal of the audio installation.

11. 2. The acoustic installation according to claim 1, wherein the preset distance between the second sound wave sensor and the first sound wave sensor is adjustable.

12. the audio equipment includes a head-mounted electronic device; the head mounted electronic device comprises a hearing aid; the hearing aid includes at least one earphone; at least a portion of the first sound wave sensor and at least a portion of the second sound wave sensor are located within the earphone; Each of the at least one earphones includes at least one signal converter; 2. The audio equipment according to claim 1, wherein the at least one signal converter is arranged to receive the output signal from the signal processing circuitry each time and to output an audio signal for transmission via air.

13. the audio equipment includes a head-mounted electronic device; the head mounted electronic device comprises a hearing aid; the hearing aid includes at least one earphone; at least a portion of the first sound wave sensor and at least a portion of the second sound wave sensor are located within the earphone; Each of the at least one earphones includes at least one signal converter; 2. The audio equipment according to claim 1, wherein the at least one signal converter is arranged to receive the output signal from the signal processing circuitry each time and to output a bone conduction audio signal.

14. the first signal includes n first sub-signals, the second signal includes n second sub-signals, The i-th first sub-signal and the i-th second sub-signal correspond to the same frequency band, wherein: The n is a positive integer greater than 1, and the i is an arbitrary integer from 1 to n, 2. The audio equipment according to claim 1, wherein the signal processing circuit processes the first sub-signal and the second sub-signal having the same number in each pair, and combines the output signal.

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