CN112118339A - Electronic device, signal processing method and apparatus - Google Patents

Abstract

The embodiment of the application provides electronic equipment and a signal processing method and device, wherein the electronic equipment is provided with a sound generating device with two sound generating units, a processor processes a first call audio signal to obtain two paths of sound signals, namely a second call audio signal and a cancellation audio signal, the first sound generating unit is used for sending a call sound signal according to the second call audio signal, and the second sound generating unit is used for sending the cancellation sound signal according to the cancellation audio signal.

Description

Electronic device, signal processing method and apparatus

Technical Field

The present application relates to the field of acoustics, and more particularly, to an electronic device, a method and an apparatus for signal processing.

Background

When an electronic device such as a mobile phone enters the ear of a user in a call scene, sound signals can be transmitted outside the ear through reasons such as vibration of a rear cover, auricle leakage or head diffraction, so that a sound leakage phenomenon is generated, and particularly when the user calls in a relatively quiet public place (such as a conference room and an elevator), the privacy of the user is easily leaked by the sound leakage of the mobile phone, so that the user experience is greatly influenced, and the user experience is greatly reduced.

Disclosure of Invention

The application provides an electronic equipment that can offset sound leakage, this electronic equipment can generate two way sound signals, sound signal of the same kind is the conversation sound signal that bears the conversation data, another way sound signal is the offset sound signal that is used for offsetting sound leakage, these two way sound signals superpose each other outside electronic equipment, when the sound intensity that does not reduce as far as possible and go into the ear, can offset some signals that the conversation sound signal leaked outside the ear through offsetting sound signal, with the sound leakage phenomenon that reduces electronic equipment, improve user experience.

In a first aspect, an electronic device is provided, which includes:

the processor is used for processing the first call audio signal to obtain a second call audio signal and a cancellation audio signal;

the sound generating device is connected with the processor and comprises a first sound generating unit and a second sound generating unit, wherein the first sound generating unit is used for sending a call sound signal according to the second communication audio signal, the second sound generating unit is used for sending a cancellation sound signal according to the cancellation audio signal, so that the call sound signal and the cancellation sound signal are smaller than or equal to a first threshold value after the sound intensity of the cancellation sound signal is superposed at a sound leakage position outside the electronic equipment, and the call sound signal and the cancellation sound signal are superposed at an ear entrance position outside the electronic equipment and are larger than or equal to a second threshold value.

In the embodiment of the present application, there is a difference in phase between the call sound signal and the cancellation sound signal at the sound leakage position. Thus, the canceling sound signal can cancel out the signal in which the call sound signal leaks at the sound leakage position.

In some embodiments, the sound signals of the talk sound signal and the cancellation sound signal at the sound leakage position are opposite in phase and the same in amplitude. Thus, the effect of canceling the leakage sound can be better.

The electronic equipment provided by the embodiment of the application is provided with a sound generating device with two sound generating units and a processor capable of processing a call audio signal, wherein the processor is used for processing a first call audio signal to obtain a second call audio signal and a counteracting audio signal, the first sound generating unit in the sound generating device is used for generating a call sound signal according to the second call audio signal, the second sound generating unit in the sound generating device is used for generating the counteracting sound signal according to the counteracting audio signal, and the counteracting sound signal is used for counteracting the sound signal of the call sound signal leaked out of ears, the sound intensity of the call sound signal and the cancellation sound signal after being superimposed at the sound leakage position outside the electronic device can be made less than or equal to the first threshold, and the sound intensity of the call sound signal and the cancellation sound signal after being superposed at the ear-entering position outside the electronic equipment is greater than or equal to a second threshold value. Therefore, the intensity of sound entering the ear is not reduced as much as possible, and meanwhile, some signals of the communication sound signal leaking out of the ear can be offset through the offset sound signal, so that the sound leakage phenomenon of the electronic equipment is reduced, and the user experience is improved.

With reference to the first aspect, in certain implementations of the first aspect, the first sound emitting unit and the second sound emitting unit are disposed opposite to each other along a thickness direction of the electronic device.

The relative arrangement means that the first sound generating unit and the second sound generating unit are adjacently arranged in the thickness direction perpendicular to the electronic equipment, or the relative arrangement means that the projections of the first sound generating unit and the second sound generating unit on a plane perpendicular to the thickness direction of the electronic equipment are at least partially overlapped, and the at least partial overlap means partial overlap or complete overlap.

The electronic equipment that this application embodiment provided, first vocal unit and second vocal unit set up relatively, mean that the distance of the position between first vocal unit and the second vocal unit as the sound source is nearer, like this, the sound of revealing outside the ear in the conversation sound signal that can send through the second vocal unit well is offset the sound that leaks through first vocal unit, and the effect of offsetting lou is more obvious.

With reference to the first aspect, in certain implementations of the first aspect, the first sound generating unit and the second sound generating unit are arranged in a staggered manner along a length direction of the electronic device.

With reference to the first aspect, in certain implementations of the first aspect, the first sound generating unit and the second sound generating unit are arranged in a staggered manner along a width direction of the electronic device.

With reference to the first aspect, in certain implementations of the first aspect, the electronic device includes a middle plate, and a screen and a rear cover that are oppositely disposed on two sides of the middle plate, the first sound generating unit is disposed between the middle plate and the screen, and the second sound generating unit is disposed between the middle plate and the rear cover.

The electronic equipment that this application embodiment provided, when first sound producing unit sets up between medium plate and screen, the back lid region of electronic equipment can take place relatively serious sound leakage phenomenon, through setting up second sound producing unit between medium plate and back lid, and the sound that offsets sound signal through what second sound producing unit sent is strong near the back lid, can offset sound leakage well.

With reference to the first aspect, in certain implementation manners of the first aspect, the first sound generating unit is an exciter, the second sound generating unit is a receiver, the electronic device further includes a first sound outlet hole and a first sound guiding channel, the first sound outlet hole is disposed on the rear cover, and two ends of the first sound guiding channel are respectively communicated with the first sound outlet hole and the second sound generating unit.

With reference to the first aspect, in certain implementations of the first aspect, the first sound outlet is disposed at a top end of the rear cover.

The electronic equipment that this application embodiment provided, when second sound producing unit is the earphone, through the first sound hole setting that will correspond with this earphone on the top of lid in the back, not only can realize better effect of offsetting lou sound, can compromise the appearance design of complete machine in addition again, can minimize because the setting of sound hole leads to the fact the influence to the outward appearance.

With reference to the first aspect, in certain implementations of the first aspect, the first sound emitting unit and the second sound emitting unit are both exciters.

With reference to the first aspect, in certain implementation manners of the first aspect, the first sound emitting unit and the second sound emitting unit are both earphones, the electronic device further includes a second sound guiding channel, a third sound guiding channel, and a second sound emitting hole and a third sound emitting hole which are arranged at intervals, the second sound emitting hole is arranged on the screen, two ends of the second sound guiding channel are respectively communicated with the second sound emitting hole and the first sound emitting unit, the third sound emitting hole is arranged on the rear cover, and two ends of the third sound guiding channel are respectively communicated with the third sound emitting hole and the second sound emitting unit.

With reference to the first aspect, in some implementations of the first aspect, the second sound outlet is disposed at a top end of the screen, or the third sound outlet is disposed at a top end of the rear cover.

The electronic equipment that this application embodiment provided, when first sound producing unit is the earphone, through the second sound hole setting that corresponds with this earphone on the top of screen, can satisfy user's daily use custom. When the second sound generating unit is also a receiver, the third sound outlet corresponding to the receiver is arranged at the top end of the rear cover, so that a better effect of offsetting sound leakage can be realized, the appearance design of the whole machine can be considered, and the influence on the appearance caused by the arrangement of the sound outlet can be reduced as much as possible.

With reference to the first aspect, in certain implementation manners of the first aspect, the first sound generating unit is a receiver, the second sound generating unit is an exciter, the electronic device further includes a fourth sound guiding channel and a fourth sound outlet, the fourth sound outlet is disposed on the screen, and two ends of the fourth sound guiding channel are respectively communicated with the fourth sound outlet and the first sound generating unit.

With reference to the first aspect, in certain implementations of the first aspect, the fourth sound outlet hole is disposed at a top end of the screen.

With reference to the first aspect, in certain implementations of the first aspect,

the first threshold is 5% of the sound intensity of the call sound signal at the sound leakage position; or the like, or, alternatively,

the second threshold is 90% of the sound intensity of the call sound signal at the in-ear position.

With reference to the first aspect, in certain implementations of the first aspect, a call filter and a cancellation filter are integrated on the processor, the call filter is configured to process the first call audio signal to obtain the second call audio signal, the cancellation filter is configured to process the first call audio signal to obtain the cancellation audio signal, coefficients of the call filter and coefficients of the cancellation filter are determined based on a first sound transfer function, a second sound transfer function and a target value, where,

the call sound signal is propagated to a plurality of positions outside the electronic device through the first sound transfer function, the cancellation sound signal is propagated to the plurality of positions through the second sound transfer function, the target value represents the sound intensity of the sound signal which is emitted from the first sound emitting unit and the second sound emitting unit based on the first call sound signal and is not processed by the call filter and the cancellation filter after being superimposed at each position, and the plurality of positions include the sound leakage position and the ear insertion position.

With reference to the first aspect, in certain implementations of the first aspect, the talk filter and the cancellation filter are finite impulse response FIR filters.

With reference to the first aspect, in certain implementations of the first aspect, the electronic device is a mobile phone.

In some embodiments, the exciter may be any of a ceramic piezoelectric patch, a motor, or a magnetically levitated vibrator.

In a second aspect, a method of signal processing is provided, the method comprising:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the ear entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

In the embodiment of the application, two paths of basically same sound signals emitted by the sound generating device according to the downlink audio signals are signals which are not processed by the filter, and the coefficients of the two filters which can achieve the effect of canceling the leakage sound need to be reversely deduced through the two sound transfer functions and the expected target value.

In addition, the first sound emitting unit and the second sound emitting unit may be arranged in the electronic device as the first aspect provides.

The method for processing signals provided by the embodiment of the application comprises the steps that two sound generating units are arranged in an electronic device, two paths of basically same sound signals are generated based on a downlink audio signal, a first sound transfer function and a second sound transfer function of the two sound generating units to a plurality of positions outside the electronic device are respectively determined, the two sound transfer functions are used as input data, expected values of sound intensities of the two paths of sound signals superposed at each position are used as target values, and coefficients of a call filter and coefficients of a cancellation filter are reversely deduced through the two sound transfer functions and the target values, so that when the call filter and the cancellation filter are arranged in the electronic device, a signal processed by the downlink audio signal through the call filter can generate a call sound signal through the first sound generating unit, and a signal processed by the downlink audio signal through the cancellation filter can generate a cancellation sound signal through the second sound generating unit, the call sound signal and the cancellation sound signal are superimposed in the air to achieve a desired effect of canceling the leakage sound at a target value without reducing the sound intensity entering the ear as much as possible.

With reference to the second aspect, in certain implementations of the second aspect, the superimposed sound intensity at the leakage sound position is equal to 0.

According to the signal processing method provided by the embodiment of the application, the sound intensity of the two paths of sound signals in the target value after being superposed at the sound leakage position is set to be 0, and the obtained call filter and the cancellation filter can better achieve the effect of canceling the sound leakage.

With reference to the second aspect, in certain implementations of the second aspect, the sound intensity after superposition at the in-ear position is equal to the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

According to the signal processing method provided by the embodiment of the application, the sound intensity of the two paths of sound signals in the target value after being superposed at the in-ear position is set as the sound intensity of the sound signal sent by the first sound sending unit at the in-ear position, and the obtained call filter and the cancellation filter can better ensure the sound intensity entering the ear while the effect of canceling the sound leakage can be realized.

With reference to the second aspect, in certain implementations of the second aspect, the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound-emitting unit at the sound leakage position.

With reference to the second aspect, in certain implementations of the second aspect, the fourth threshold is 90% of the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

With reference to the second aspect, in some implementations of the second aspect, the determining coefficients of a call filter and coefficients of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value includes:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

With reference to the second aspect, in certain implementations of the second aspect, the talk filter and the cancellation filter are finite impulse response FIR filters.

In a third aspect, an apparatus for signal processing is provided, the apparatus comprising a processing unit configured to:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the sound entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

The signal processing apparatus provided in this embodiment of the application, where two sound generating units are disposed in an electronic device, two paths of substantially identical sound signals are generated based on a downlink audio signal, a first sound transfer function and a second sound transfer function of the two sound generating units to a plurality of positions outside the electronic device are respectively determined, the two sound transfer functions are used as input data, an expected value of sound intensity obtained by superimposing the two paths of sound signals at each position is used as a target value, and a coefficient of a call filter and a coefficient of a cancellation filter are inversely derived from the two sound transfer functions and the target value, so that when the call filter and the cancellation filter are disposed in the electronic device, a signal processed by the downlink audio signal through the call filter can be generated by the first sound generating unit, and a signal processed by the downlink audio signal through the cancellation filter is generated by the second sound generating unit, the call sound signal and the cancellation sound signal are superimposed in the air to achieve a desired effect of canceling the leakage sound at a target value without reducing the sound intensity entering the ear as much as possible.

With reference to the third aspect, in certain implementations of the third aspect, the superimposed sound intensity at the leakage sound position is equal to 0.

According to the signal processing device provided by the embodiment of the application, the sound intensity of the two paths of sound signals in the target value after being superposed at the sound leakage position is set to be 0, and the obtained call filter and the cancellation filter can better achieve the effect of canceling the sound leakage.

With reference to the third aspect, in certain implementations of the third aspect, the superimposed sound intensity at the in-ear position is equal to the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

The device for processing signals provided by the embodiment of the application sets the sound intensity of the two paths of sound signals in the target value after being superposed at the in-ear position as the sound intensity of the sound signal sent by the first sound-sending unit at the in-ear position, and the obtained call filter and the cancellation filter can better ensure the sound intensity entering the ear while the effect of canceling the sound leakage can be realized.

With reference to the third aspect, in certain implementations of the third aspect, the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

With reference to the third aspect, in certain implementations of the third aspect, the fourth threshold is 90% of an acoustic intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

With reference to the third aspect, in some implementations of the third aspect, the processing unit is specifically configured to:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

With reference to the third aspect, in certain implementations of the third aspect, the talk filter and the cancellation filter are finite impulse response FIR filters.

In a fourth aspect, an electronic device is provided, comprising: a processor coupled with a memory, the memory for storing a program that, when executed by the processor, causes an electronic device to perform the steps of:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the ear entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the superimposed sound intensity at the leakage sound position is equal to 0.

With reference to the fourth aspect, in some implementations of the fourth aspect, the superimposed sound intensity at the in-ear position is equal to the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the fourth threshold is 90% of the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

With reference to the fourth aspect, in some implementations of the fourth aspect, the program, when executed by the processor, causes the electronic device to embody the steps of:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the talk filter and the cancellation filter are finite impulse response FIR filters.

In a fifth aspect, a chip is provided, which includes a processor, and is configured to call and execute instructions stored in a memory, so that an electronic device in which the chip is installed executes the method of the second aspect.

In a sixth aspect, a computer storage medium is provided, comprising: a processor coupled to a memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of the second aspect described above.

Drawings

Fig. 1 is a schematic diagram of sound signal distribution when a user uses an electronic device to perform a call according to an embodiment of the present application.

Fig. 2 is another schematic diagram of a sound signal distribution when a user uses an electronic device to perform a call according to an embodiment of the present application.

Fig. 3 is a schematic block diagram of an electronic device provided in an embodiment of the present application.

Fig. 4 is a schematic flow chart of the electronic device provided by the present application for generating two sound signals.

Fig. 5 to 11 are schematic structural diagrams of an electronic device in which an exciter and an earpiece are combined according to an embodiment of the present application.

Fig. 12 to 14 are schematic structural diagrams of an actuator and an actuator combined electronic device provided in an embodiment of the present application.

Fig. 15 to 19 are schematic structural diagrams of an electronic device with a combined handset and handset provided in an embodiment of the present application.

Fig. 20 to 22 are schematic structural diagrams of an electronic device in which an earpiece and an exciter are combined according to an embodiment of the present application.

Fig. 23 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Fig. 24 is a schematic flow chart of a method of signal processing provided by an embodiment of the present application.

Fig. 25 is a schematic diagram of sound field distribution when a user answers a call according to an embodiment of the present application.

Fig. 26 is a schematic block diagram of an apparatus for signal processing provided in an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The electronic device of the present application may be any electronic device capable of generating sound, and may be, for example, a mobile phone, an intercom, a fixed telephone, or the like. The electronic equipment is provided with a sound generating device used for converting an audio signal into a sound signal, a user pastes the electronic equipment on the edge of an ear in a conversation process, and the sound signal sent by the sound generating device enters the ear to realize conversation.

Fig. 1 is a schematic diagram of sound signal distribution when a user uses a prior art electronic device to perform a call according to an embodiment of the present application. For convenience of explanation, a mobile phone will be described as an example of the electronic apparatus 100. Referring to fig. 1, when a user communicates with the mobile phone 100, the mobile phone 100 is attached to an ear 201, the mobile phone 100 sends out a sound signal, a part of the sound signal can directly enter the ear 201, and another part of the sound signal does not enter the ear 201 any more but propagates to the outside of the ear 201 under the diffraction effect of the head, for example, another part of the sound signal propagates to a point a shown in fig. 1, thereby generating a sound leakage phenomenon, easily revealing user privacy, causing a great negative effect on user experience, and greatly reducing user experience.

Based on the sound leakage phenomenon of the existing electronic equipment, the electronic equipment capable of offsetting the sound leakage can generate two paths of sound signals, one path of sound signal is a call sound signal bearing call data, the other path of sound signal is an offsetting sound signal used for offsetting the sound leakage, the two paths of sound signals are mutually superposed in the air, the sound intensity entering the ear is not reduced as far as possible, meanwhile, some signals leaked outside the ear can be offset through the offsetting sound signal, the sound leakage phenomenon of the electronic equipment is reduced, and the user experience is improved.

In some embodiments, the electronic device may process a call audio signal (denoted as a first call audio signal) carrying call data to obtain two processed audio signals, where one audio signal is a cancellation audio signal for canceling a leakage sound, and the other audio signal is a processed call audio signal (denoted as a second call audio signal), and the two audio signals may generate a corresponding cancellation sound signal and a corresponding call sound signal after passing through a sound generating device in the electronic device.

In order to further understand the design idea of the embodiment of the present application, a scene of canceling the leakage sound of the electronic device provided by the embodiment of the present application is described below with reference to fig. 2.

Fig. 2 is another schematic diagram of a sound signal distribution when a user uses an electronic device to perform a call according to an embodiment of the present application. Referring to fig. 2, the mobile phone 100 sends out a call sound signal (i, the signal shown in fig. 1), a part of the call sound signal (i.e., the in-ear sound signal) directly enters into the ear 201, and another part of the call sound signal (i.e., the leakage sound signal) propagates outside the ear 201 under the diffraction effect of the head, for example, the leakage sound signal propagates to a point a shown in fig. 1. Meanwhile, the mobile phone 100 in fig. 2 also sends out a cancellation sound signal (signal ±(s) shown in fig. 1), the cancellation sound signal can be superposed and cancelled with the leakage sound signal at the point a, and a signal smaller or smaller than the leakage sound signal can be generated at the point a, in an ideal case, the signal intensity of the cancellation sound signal and the signal intensity of the leakage sound signal after superposition and cancellation at the point a are 0, meanwhile, the influence of the cancellation sound signal on the in-ear sound signal is small, and in an ideal case, the sound intensity of the in-ear sound signal is unchanged, so that the in-ear sound signal cannot be influenced to a large extent while the leakage sound can be eliminated, and the user experience is greatly improved.

Fig. 3 is a schematic block diagram of an electronic device provided in an embodiment of the present application. Referring to fig. 3, the electronic apparatus 100 includes a processor 110, an amplifier 120, a sound emitting device 130, an audio device 140, a screen 150, and a microphone 160, and the processor 110 may be electrically connected to the remaining respective components. Note that the cellular phone 100 shown in fig. 1 and 2 may be an example of the electronic device 100.

Processor 110 may include one or more processing units. For example, the processor 110 may include a Digital Signal Processor (DSP), an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors. The controller may be, among other things, a neural center and a command center of the electronic device 100. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

In this embodiment, the processor 110 may be configured to process a first call audio signal carrying call data to obtain a cancellation audio signal and a second call audio signal, where the two audio signals may generate a corresponding cancellation audio signal and a corresponding call audio signal after passing through the sound generating device 130.

In some embodiments, the processor 110 includes a DSP, and the processing unit for processing the audio signal may be a DSP or a processing unit independent of a DSP. Illustratively, the filter may be integrated on a DSP, which may be an existing DSP in the electronic device when the processing unit for processing the audio signal is a DSP, or a new DSP independent from the existing DSP in the electronic device.

A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

Amplifying device 120 is used to amplify the power of the audio signal (e.g., the cancellation audio signal and the second communication audio signal) output from processor 110 to drive sound generating device 130 to convert the audio signal into a sound signal. The amplifying device 120 may include one or more amplifying units, and each amplifying unit may output one signal, which is not limited in this embodiment.

The sound generating device 130 is used for converting the audio signal into a sound signal, and when a user is talking, the sound generating device 130 can be close to the ear of the user to listen to the sound signal. The sound generating device 130 may include one or more sound generating units, each of which is capable of outputting one path of signal, and includes at least two sound generating units according to the embodiment of the present application, so as to implement two paths of sound generation of the electronic device.

In embodiments where sound-generating device 130 includes multiple sound-generating units, in some embodiments, sound-generating device 130 may include two earpieces or two actuators or a combination of earpieces and actuators (such as the embodiments corresponding to fig. 5-22 below). Illustratively, the earpiece may be a conventional moving coil earpiece. Illustratively, the exciter may be a magnetically levitated vibrator, a motor, a ceramic piezoelectric plate, or the like. It can be understood that the sound production by the exciter is a sound production device in the current screen sound production technology, and is different from the sound production technology of a receiver, which is briefly described below.

The receiver drives the vibrating membrane to vibrate through the stress of the coil in the magnetic field, and sends a sound signal through a sound guide channel in the electronic equipment. Specifically, when an alternating current (ac) audio current passes through a coil (or called as a voice coil) of the handset, a corresponding magnetic field is generated in the coil, the magnetic field and a magnetic field generated by a permanent magnet on the handset generate an interaction force, the coil vibrates up and down under the action of the force, and drives a diaphragm connected with the coil to also vibrate up and down to generate a sound signal, and the sound signal is sent through a sound guide channel in the electronic device.

The exciter is used for driving other parts of the electronic device to vibrate by utilizing vibration of the exciter so as to generate sound signals, and the other parts can be a screen, a middle frame or a rear cover of the electronic device. In some embodiments, the vibration of the exciter directly drives the screen to vibrate, or the vibration mechanical energy of the exciter is directly transmitted to the screen to drive the screen to vibrate, and the screen generates sound through the vibration. In other embodiments, the vibration of the exciter drives the middle frame to vibrate so as to drive the screen and the rear cover to vibrate, and the sound is produced through the vibration of the screen and the rear cover. In other embodiments, the vibration of the exciter vibrates the rear cover, and the sound is produced by the vibration of the rear cover.

Compared with a receiver, the sound production of the electronic equipment realized by adopting the exciter has the following advantages: firstly, holes do not need to be formed in the electronic equipment, so that the dustproof and waterproof performance is improved, and the electronic equipment is attractive in vision; second, the sound signal may be generated at an arbitrary position of the electronic device (e.g., may be at an arbitrary position of the screen); thirdly, the installation position of the exciter is flexible.

In the existing screen sounding technology, the screen is directly driven to vibrate by the vibration of the exciter to generate a call sound signal, or the middle frame is driven to vibrate by the vibration of the exciter to drive the screen to vibrate to generate a call sound signal, so that a user can listen to the call sound signal on the screen side.

In embodiments where sound generating device 130 includes multiple sound generating units, in other embodiments, sound generating device 130 may be a modified earpiece (such as the embodiment corresponding to fig. 23 below) composed of two diaphragm sets, two voice coils, and a common magnetic circuit system.

In the embodiment of the present application, the two sound emitting units of the sound emitting device 130 may respectively generate a call sound signal and a cancellation sound signal. For ease of understanding and description, the sound emitting unit that generates the call sound signal is referred to as a first sound emitting unit, and the sound emitting unit that generates the canceling sound signal is referred to as a second sound emitting unit. In some embodiments, the first sound emitting unit is an earpiece and the second sound emitting unit may be an earpiece or an actuator. In other embodiments, the first sound emitting unit is an exciter and the second sound emitting unit may be an earpiece or an exciter.

Illustratively, the first sound emitting unit is disposed adjacent to the screen 150 and the second sound emitting unit is disposed adjacent to the rear cover of the electronic device.

The audio module 140 is used to convert digital audio information into an analog audio signal output and also used to convert an analog audio input into a digital audio signal. The audio module 140 may also be used to encode and decode audio signals. In some embodiments, the audio module 140 may be disposed in the processor 110, or some functional modules of the audio module 140 may be disposed in the processor 110.

In the present embodiment, the audio module 140, the sound emitting device 130, the microphone 160, and the processor 110 implement audio functions.

The screen 150 is used to display images, videos, etc., and in the screen sounding technique, the screen 150 is also used to vibrate under the driving of an exciter to generate a sound signal. The display screen 194 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the electronic device 100 may include 1 or N screens 150, N being a positive integer greater than 1.

The electronic device 100 may implement display functions via the GPU, the screen 150, and the application processor, among others. The GPU is a microprocessor for image processing, connected to the screen 150 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The microphone 160, also referred to as a "microphone," is used to convert acoustic signals into electrical signals. When making a call or transmitting voice information, the user can input a voice signal to the microphone 160 by speaking the user's mouth near the microphone 160. The electronic device 100 may be provided with at least one microphone 160. In some embodiments, the electronic device 100 may be provided with two microphones 160, which may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the electronic device 100 may further include three, four or more microphones 160 to collect sound signals, reduce noise, identify sound sources, perform directional recording, and so on.

While the components of the electronic device in the embodiment of the present application are described above with reference to fig. 3, it should be understood that the structure of the components illustrated in the embodiment of the present application does not specifically limit the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or less components than those shown, or combine some components, or split some components, or arrange different components, for example, the electronic device 100 of the present embodiment further includes a camera, a sensor module, a USB interface, a memory, a wireless charging coil, and the like. The components shown and not shown may be implemented in hardware, software, or a combination of software and hardware.

For convenience of description, the embodiment of the present application defines two types of positions, namely, an in-ear position and a sound leakage position.

The in-ear position represents a position where an ear is located when the user uses the electronic device to answer the call, and the in-ear position represents a position which is close to the first sound-emitting unit and has better sound intensity and is outside the electronic device. Illustratively, the in-ear position may be a position outside the electronic device near the top of the screen, e.g., the position of the ear 201 in fig. 2 is the in-ear position,

the sound leakage position represents a position where a call sound signal may be leaked when a user uses the electronic device to answer a call, and compared with the in-ear position, the sound intensity at the sound leakage position is generally smaller or much smaller than that at the in-ear position. Theoretically, the positions other than the in-ear position among all positions that can be reached by sound outside the electronic device may be the sound leakage positions, however, the sound leakage at some positions is serious and the sound leakage at some positions is very small. Illustratively, the sound leakage position may be a position outside the electronic device near the rear cover of the electronic device, e.g., point a shown in fig. 2 may be a sound leakage position,

it can be understood that, in the embodiment of the present application, it is expected that the sound intensity of the superimposed call sound signal and cancellation sound signal sent from the electronic device at the ear-entering position is not very different from the sound intensity of the superimposed call sound signal at the ear-entering position, and for the sound leakage position, it is expected that the sound intensity of the superimposed call sound signal and cancellation sound signal at the sound leakage position is smaller, so as to achieve the effect of cancelling the sound leakage and improve the user experience.

It should be noted that the sound signal (or sound wave) is a vector, and is a vector representing the sound signal formed by the phase and the amplitude, and the two sound signals are superimposed at a position where two different vectors formed by the phase and the amplitude are added. For example, the sound intensity of the call sound signal and the cancellation sound signal superimposed at the sound leakage position indicates that the call sound signal forms a first sound vector at the sound leakage position, the cancellation sound signal forms a second sound vector at the sound leakage position, and the first sound vector and the second sound vector are added to form a new sound vector. For another example, the sound intensity of the superimposed call sound signal and cancellation sound signal at the in-ear position indicates that the call sound signal forms a third sound vector at the in-ear position, the cancellation sound signal forms a fourth sound vector at the in-ear position, and the third sound vector and the fourth sound vector are added to form a new sound vector.

It should be further noted that, compared with the sound intensity of one path of sound signal at a certain position, the sound intensity of the two paths of sound signals after being superimposed at the certain position may be increased or decreased without changing. For example, the sound intensity of the call sound signal and the cancellation sound signal superimposed at the sound leakage position is reduced, even 0, compared to the sound intensity of the call sound signal at the sound leakage position. For another example, the sound intensity of the call sound signal and the cancellation sound signal after being superimposed at the in-ear position may be equal to the sound intensity of the call sound signal at the in-ear position, and may not be changed compared to the sound intensity of the call sound signal at the in-ear position.

Fig. 4 is a schematic flow chart of the electronic device provided by the present application for generating two-way sound signals. Referring to fig. 4, the electronic device 100 includes a processor 110 and a sound generating device 130 having a first sound generating unit 131 and a second sound generating unit 132, the processor 110 is electrically connected to the sound generating device 130, a first downlink call audio signal serves as an input signal, the processor 110 processes the input signal to obtain a second call audio signal and a cancellation audio signal, the second call audio signal sends a call sound signal through the first sound generating unit 131, the cancellation audio signal sends the cancellation sound signal through the second sound generating unit 132, so that the sound intensity of the call sound signal and the cancellation sound signal superimposed at a sound leakage position outside the electronic device is less than or equal to a first threshold, and the sound intensity of the call sound signal and the cancellation sound signal superimposed at an ear insertion position outside the electronic device is greater than or equal to a second threshold. Therefore, under the condition that the user does not influence the call answering, the sound signal of the call sound signal leaked outside the ear can be cancelled out through the cancellation sound signal, so that the user experience is improved.

It is understood that, in the embodiment of the present application, there is a difference in phase between the call sound signal generated by the electronic device and the sound signal of the cancellation sound signal at the sound leakage position, so that the cancellation sound signal can cancel the signal of the call sound signal leaking at the sound leakage position. It will also be appreciated that the difference between the phase of the sound signal at the in-ear position of the conversation sound signal and the cancellation sound signal is small so as not to reduce the sound intensity entering the in-ear position as much as possible.

In some embodiments, the sound signals of the talk sound signal and the cancellation sound signal at the sound leakage position are opposite in phase and the same in amplitude. Thus, the effect of canceling the leakage sound can be better.

In some embodiments, the first threshold may be 5% of the sound intensity of the call sound signal at the sound leakage position.

In other words, the sound intensity of the call sound signal and the cancel sound signal at the sound leakage position is less than or equal to 5% of the sound intensity of the call sound signal at the sound leakage position.

Of course, the first threshold may be other values, for example, the first threshold may be 3% of the sound intensity of the call sound signal at the sound leakage position.

Illustratively, ideally, the sound intensities of the call sound signal and the cancellation sound signal at the sound leakage position are equal to 0. Meaning that the sound signal of the call sound signal leaking outside the ear can be completely canceled.

In some embodiments, the second threshold may be 90% of the sound intensity of the speech sound signal at the in-ear position.

In other words, the sound intensity of the call sound signal and the cancellation sound signal at the in-ear position is greater than or equal to 90% of the sound intensity of the call sound signal at the in-ear position.

Of course, the second threshold may be other values, and the second threshold is 95% of the sound intensity of the call sound signal at the in-ear position.

Illustratively, ideally, the sound intensity of the call sound signal and the cancellation sound signal at the in-ear position is equal to the sound intensity of the call sound signal at the in-ear position. Meaning that the cancellation sound signal does not affect the sound intensity of the call sound signal at the in-ear position.

In some embodiments, with continued reference to fig. 4, the processor 110 has a call filter 111 and a cancellation filter 112 integrated therein, it being understood that the call filter 111 is used to process the first call audio signal to obtain the second call audio signal, and the cancellation filter 112 is used to process the first call audio signal to obtain the cancellation audio signal.

Illustratively, the talk filter 111 and the cancellation filter 112 may be Finite Impulse Response (FIR) filters. Of course, the call filter 111 and the cancellation filter 112 may also be Infinite Impulse Response (IIR) filters, which is not limited in this embodiment of the present application

In some embodiments, the electronic device 100 further includes an amplifying device 120 having a first amplifying unit 121 and a second amplifying unit 132, and the processor 110 is connected to the sound generating device 130 through the amplifying device 120. The second communication audio signal output from the processor 110 outputs the amplified second communication audio signal through the first amplifying unit 121, the cancellation audio signal output from the processor 110 outputs the amplified cancellation audio signal through the second amplifying unit 122, and the two paths of amplified audio signals respectively output a call audio signal and a cancellation audio signal after passing through the sound generating device 130.

As can be seen from the above description, the two filters respectively process the first call audio signal to obtain two paths of signals (the second call audio signal and the cancellation audio signal) different from the first call audio signal, and then, the sound generating device 130 having two sound generating units generates two paths of sound signals to achieve the effect of canceling the sound leakage.

Therefore, in the embodiment of the present application, on one hand, how the sound generating device is disposed in the electronic device affects the effect of canceling the leakage sound, and on the other hand, the coefficient of the filter, which is a component for processing the call audio signal, also affects the effect of canceling the leakage sound. Next, the embodiments of the present application will be described from the above two aspects.

First, with reference to fig. 5 to 23, the electronic device according to the embodiment of the present application is described in terms of a hardware structure, the arrangement manner of the sound generating device 130 in the electronic device is mainly described, and then, with reference to fig. 24 to 26, the method for processing a signal provided by the embodiment of the present application is described in terms of a method, and a process of determining a coefficient of a filter is mainly described in detail.

Fig. 5 to 11 are schematic structural diagrams of an electronic device in which an exciter and an earpiece are combined according to an embodiment of the present application, fig. 12 to 14 are schematic structural diagrams of an electronic device in which an exciter and an exciter are combined according to an embodiment of the present application, fig. 15 to 19 are further schematic structural diagrams of an electronic device in which an earpiece and an earpiece are combined according to an embodiment of the present application, and fig. 20 to 22 are schematic structural diagrams of an electronic device in which an earpiece and an exciter are combined according to an embodiment of the present application. Fig. 23 is a schematic block diagram of an electronic device with a handset capable of realizing two-way sound emission according to an embodiment of the present application.

Hereinafter, the structure of the electronic device with the exciter and the earpiece combination provided in the embodiments of the present application will be described with reference to fig. 5 to 11.

Referring to fig. 5, the electronic device 100 includes a screen 150, a rear cover 170, a housing 180, and a sound generating device having a first sound generating unit 131 and a second sound generating unit 132, wherein the screen 150 and the rear cover 170 are oppositely disposed on the housing 180 and are accommodated and fixed in the housing 180. The case 180 includes a middle plate 181 and a bezel 182 connected, the middle plate 181 is disposed between the screen 150 and the rear cover 170, and serves as a support for components housed inside the electronic device, the bezel 182 surrounds the screen 150 and the rear cover 170, the screen 150 and the rear cover 170 are disposed at a front end and a rear end of the bezel 182, respectively, the front end and the rear end of the bezel 182 are both ends in a thickness direction (z direction) of the electronic device, edges of the screen 150 abut and are fixed at the front end of the bezel 182 to form a front surface of the electronic device, and edges of the rear cover 170 abut and are fixed at the rear end of the bezel 182 to form a rear surface of the electronic device. The space between the middle plate 181 and the screen 150 and the space between the middle plate 181 and the rear cover 170 may accommodate various components (e.g., a main board, a battery, a sound-emitting device, a camera, etc.) to implement various functions of the electronic apparatus. In this embodiment, first sound emitting unit 131 is an exciter, denoted as exciter 1311, disposed between screen 150 and center panel 181, and second sound emitting unit 132 is an earpiece, denoted as earpiece 1321, disposed between rear cover 170 and center panel 181.

In some embodiments, the exciter 1311 is fixedly connected below the screen 150, and is electrically connected to a main board (not shown) on which the processor 110 is mounted, specifically, to the conversation filter 111 integrated on the processor 110, the earpiece 1321 is fixedly connected below the middle plate 181, and is electrically connected to the main board (not shown), specifically, to the cancellation filter 112 integrated on the processor 110, the sound guide channel 101 is disposed between the earpiece 1321 and the rear cover 170, the rear cover 170 is disposed with the sound outlet hole 102, one end of the sound guide channel 101 is connected to the earpiece 1321, and the other end of the sound guide channel 101 is communicated with the sound outlet hole 102. The processor 110 processes the first call audio signal to obtain a cancellation audio signal (electrical signal) and a second call audio signal (electrical signal). The second communication audio signal is sent to the exciter 1311, and the exciter 1311 vibrates under the action of the second communication audio signal to drive the screen 150 to vibrate and make a sound, so that the second communication audio signal is converted into a communication sound signal. The cancellation audio signal is sent to the earpiece 1321, and the earpiece 1321 makes the diaphragm in the earpiece 1321 vibrate and make sound under the action of the cancellation audio signal, so that the cancellation audio signal is converted into a cancellation sound signal, and the cancellation sound signal is sent out from the sound outlet hole 102 through the sound guide channel 101.

The lower side of the screen 150 represents a side of the screen 150 close to the middle plate 181, and the lower side of the middle plate 181 represents a side of the middle plate 181 close to the rear cover 170.

It is to be understood that although fig. 5 shows the actuator 1311 fixed below the screen 150, the present application does not make any limitation on the position of the actuator 1311.

In other embodiments, the exciter 1311 may be fixedly attached above the middle plate 181 (not shown), and the exciter 1311 vibrates under the action of the second communication audio signal to vibrate the middle plate 181 to vibrate the screen 150 to generate sound.

In other embodiments, the exciter 1311 may be fixedly connected to both the middle plate 181 and the screen 150 (not shown), and the exciter 1311 vibrates under the action of the second communication audio signal to vibrate the middle plate 181 and the screen 150 to generate sound.

If the exciter 1311 is a ceramic piezoelectric plate, the exciter 1311 may be fixedly attached below the screen 150, and if the exciter 1311 is a motor or a magnetic levitation vibrator, the exciter 1311 may be fixedly attached above the middle plate 181 or below the screen 150 or on the screen 150 and the middle plate 181.

To accommodate the user's habits of receiving a call, in some embodiments, actuator 1311 is disposed proximate to a top end of electronic device 100. Illustratively, as shown in FIG. 5, actuator 1311 is mounted below screen 150 and is positioned adjacent to the top of electronic device 100. The top of the electronic device represents the uppermost area of the electronic device when the user holds the electronic device in a normal use state.

In the following embodiment in which the first sound emitting unit 131 is an exciter, for convenience of description, the relationship between the exciter 1311 and the earpiece 1321 will be described by taking as an example a structure in which the exciter 1311 is fixedly attached below the screen 150 and disposed adjacent to the top end of the electronic device as shown in fig. 5.

In some embodiments, referring to fig. 5-7, the exciter 1311 and the earpiece 1321 are disposed opposite each other along a thickness direction (z direction) of the electronic device 100, where the opposite disposition indicates that the two sound emitting units are disposed adjacent to each other in the thickness direction perpendicular to the electronic device 100, or the opposite disposition indicates that projections of the two sound emitting units on a plane (xy plane) perpendicular to the thickness direction of the electronic device 100 at least partially coincide, and the at least partially coincident indicates that the two sound emitting units partially coincide or completely coincide. In this configuration, the driver 1311 and the earpiece 1321 are disposed opposite to each other, which means that the driver 1311 and the earpiece 1321 as the sound source are located at a short distance from each other, so that the cancellation sound signal emitted from the earpiece 1321 can cancel the sound leaked to the outside of the ear from the speech sound signal emitted from the driver 1311, and the effect of canceling the leaked sound is remarkable.

Illustratively, referring to fig. 5, the exciter 1311 is fixedly attached below the screen 150, the earpiece 1321 is fixedly attached below the middle plate 181, the exciter 1311 and the earpiece 1321 are disposed opposite to each other, the sound outlet hole 102 is disposed at the top end of the rear cover 170, and the sound guide passage 101 is substantially parallel to the length direction (y direction) of the electronic device. The top of the rear cover 180 represents the uppermost area of the rear cover when the user holds the electronic device in a normal use state. The sound outlet hole with the structure not only has a good effect of offsetting the leakage sound, but also can give consideration to the appearance design of the whole machine, and the influence on the appearance caused by the arrangement of the sound outlet hole is reduced as much as possible.

Exemplarily, referring to fig. 6, fig. 6 is different from fig. 5 in that the sound outlet hole 102 is disposed in the top end of the electronic device adjacent to the rear cover 170, specifically, the sound outlet hole 102 is disposed in the top end of the frame 182 adjacent to the rear cover 170, and the sound guide channel 101 is substantially parallel to the length direction (y direction) of the electronic device. The top of the frame 182 represents the uppermost area of the frame 182 when the user holds the electronic device in a normal use state, and can be used as the top of the electronic device. The sound outlet hole with the structure has little influence on the appearance of the whole machine.

Exemplarily, referring to fig. 7, fig. 7 is different from fig. 5 in that the sound outlet hole 102 is disposed on the back cover 170 and is disposed opposite to the earpiece 1321, and the sound guide passage 101 is substantially parallel to the thickness direction (z direction) of the electronic device. The sound outlet hole with the structure not only has a good effect of offsetting the sound leakage, but also has small influence on the sound intensity of the ear insertion position, but has large influence on the appearance of the whole machine and is not beautiful enough.

In other embodiments, referring to fig. 8-10, the exciter 1311 and earpiece 1321 are offset along the length (y-direction) of the electronic device. The staggered arrangement shows that the projections of the two sounding units on a plane (xy) perpendicular to the thickness direction of the electronic equipment are not overlapped.

Illustratively, referring to fig. 8, the exciter 131 is fixedly connected below the screen 150, the earpiece 1321 is fixedly connected below the middle plate 181, and the exciter 1311 and the earpiece 1321 are arranged in a staggered manner along the length direction (y direction) of the electronic device. The sound outlet hole 102 is provided at the top end of the rear cover 170, and the sound guide passage 101 is substantially parallel to the longitudinal direction (y direction) of the electronic device.

Exemplarily, referring to fig. 9, fig. 9 is different from fig. 8 in that the sound outlet hole 102 is disposed at a top end of the electronic device, specifically, the sound outlet hole 102 is disposed at a top end of the frame 182, and the sound guide channel 101 is substantially parallel to a length direction (y direction) of the electronic device.

Exemplarily, referring to fig. 10, fig. 10 is different from fig. 8 in that the sound outlet hole 102 is provided on the back cover 170 and is disposed opposite to the earpiece 1321, and the sound guide passage 101 is substantially parallel to the thickness direction (z direction) of the electronic device.

In other embodiments, referring to fig. 11, the exciter 1311 and earpiece 1321 are offset along the width direction (x-direction) of the electronic device, and reference is made to the above description for explanation of the offset.

Illustratively, with continued reference to FIG. 11, the exciter 1311 is fixedly attached below the screen 150 and the earpiece 1321 is fixedly attached below the mid-plate 181. The sound outlet hole 102 may be disposed at the top end of the rear cover 170, and the sound guide passage 101 is substantially parallel to the length direction (y direction) of the electronic device.

Illustratively, the sound emitting hole 102 is disposed on the back cover 170 and opposite to the earpiece 1321 (not shown in the figure), and the sound guide passage 101 is substantially parallel to the thickness direction (z direction) of the electronic device.

For example, the sound output hole 102 may also be disposed at a top end (not shown) of the electronic device, and the present application is not limited thereto.

In the embodiment of the present application, as described above, in order to improve the sound intensity, the amplifying device 120 may be configured for the sound generating device, and one sound generating unit is connected to one amplifying unit, so that the audio signal is amplified in power by the amplifying unit. In the embodiment of the present application, the first sound generating unit 131 is electrically connected to the main board through the first amplifying unit 121 in the amplifying device 120, and the second sound generating unit 132 is electrically connected to the main board through the second amplifying unit 122 in the amplifying device 120.

Fig. 12 to 14 are schematic structural diagrams of an actuator and an actuator combined electronic device provided in an embodiment of the present application. Next, another structure of the electronic device will be described with reference to fig. 12 to 14.

Referring to fig. 12, the electronic device 100 includes a screen 150, a rear cover 170, a housing 180, and a sound generating device having a first sound generating unit 131 and a second sound generating unit 132, the screen 150 and the rear cover 170 are oppositely disposed on the housing 180 and are accommodated and fixed in the housing 180, and specific descriptions of the screen 150, the rear cover 170, and the housing 180 may refer to the above description of the above components in fig. 5, and are not repeated. However, in this embodiment, first sound emitting unit 131 is an exciter, designated exciter 1312, disposed between screen 150 and middle plate 181, and second sound emitting unit 132 is also an exciter, designated exciter 1322, disposed between rear cover 170 and middle plate 181.

In some embodiments, exciter 1312 is fixedly attached below screen 150 and electrically connected to a motherboard (not shown) on which processor 110 is mounted, and more particularly, to talk filter 111 integrated on processor 110, and exciter 1322 is fixedly attached above back cover 181 and electrically connected to motherboard (not shown) and electrically connected to cancellation filter 112 integrated on processor 110. The processor 110 processes the call audio signal to obtain a cancellation audio signal (electrical signal) and a second call audio signal (electrical signal). The second communication audio signal is sent to the exciter 1312, and the exciter 1312 vibrates under the action of the second communication audio signal to drive the screen 150 to vibrate and make a sound, so that the second communication audio signal is converted into a communication sound signal. The counteracting audio signal is sent to the exciter 1322, and the exciter 1322 generates vibration under the action of the counteracting audio signal, so as to drive the rear cover 170 to vibrate and make sound, thereby converting the counteracting audio signal into a counteracting sound signal.

It is understood that the actuator 1312 may be fixedly connected not only below the screen 150, but also to the middle plate 181, or both of them may be fixedly connected to the middle plate 181 and the screen 150, and the present application does not limit the position of the actuator 1312, and the detailed description may refer to the description of the actuator 1311 above. To accommodate the user's habits of receiving a call, in some embodiments, actuator 1312 is disposed adjacent the top end of electronic device 100. Illustratively, as shown in FIG. 12, actuator 1312 is mounted below screen 150 and is disposed adjacent to a top end of electronic device 100.

Similarly, the actuator 1322 may be fixedly attached above the back cover 170, or may be disposed at other positions, and the position of the actuator 1322 is not limited in this application.

In other embodiments, the exciter 1322 may be fixedly attached to the middle plate 181, and the exciter 1322 vibrates under the action of the counteracting audio signal, so as to vibrate the middle plate 181 and the rear cover 170 to generate sound.

In other embodiments, the exciter 1322 may be fixedly attached to both the middle plate 181 and the back cover 170, and the exciter 1322 vibrates under the action of the counteracting audio signal to vibrate the middle plate 181 and the back cover 170 to generate sound.

If the exciter 1322 is a ceramic piezoelectric plate, the exciter 1322 may be fixedly attached to the upper side of the back cover 170, and if the exciter 1322 is a motor or a magnetic suspension vibrator, the exciter 1322 may be fixedly attached to the lower side of the middle plate 181 or the upper side of the back cover 170 or the middle plate 181 and the back cover 170.

In the following embodiment in which the first sound emitting unit 131 is the exciter 1312, for convenience of description, the positional relationship between the exciter 1312 and the exciter 1322 will be described by taking as an example a structure shown in fig. 12 in which the exciter 1312 is fixedly attached below the screen 150 and disposed adjacent to the top end of the electronic apparatus, and the exciter 1322 is fixedly attached above the rear cover 170.

In some embodiments, referring to fig. 12, actuators 1312 and 1322 are oppositely disposed along a thickness direction of electronic device 100. In this configuration, the arrangement of the driver 1312 and the driver 1322 facing each other means that the distance between the two drivers as the sound sources is short, so that the canceling sound signal generated by the driver 1322 can cancel out the sound leaked to the outside of the ear from the speech sound signal generated by the driver 1312, and the effect of canceling the leaked sound is remarkable.

In other embodiments, referring to fig. 13, actuators 1312 and 1322 are staggered along the length (y-direction) of the electronic device.

In other embodiments, referring to fig. 14, actuators 1312 and 1322 are staggered along the width direction (x-direction) of the electronic device.

Fig. 15 to 19 are schematic structural diagrams of an electronic device with an earpiece and an earpiece combination provided in an embodiment of the present application. Another structure of the electronic apparatus will be described below with reference to fig. 15 to 19.

Referring to fig. 15, the electronic device 100 includes a screen 150, a rear cover 170, a housing 180, and a sound generating device having a first sound generating unit 131 and a second sound generating unit 132, wherein the screen 150 and the rear cover 170 are oppositely disposed on the housing 180 and are accommodated and fixed in the housing 180. For a detailed description of the screen 150, the rear cover 170 and the housing 180, reference may be made to the above description of fig. 5 for the above components, and the detailed description is omitted. However, in this embodiment, the first sound emitting unit 131 is an earpiece, denoted as earpiece 1313, disposed between the screen 150 and the middle plate 181, the electronic device 100 is provided with a sound guiding channel 103 and a sound outlet hole 104 corresponding to the earpiece 1313, and the second sound emitting unit 132 is also an earpiece, denoted as earpiece 1323, disposed between the back cover 170 and the middle plate 181, and the electronic device 100 is provided with sound guiding channels 105 and 106 corresponding to the earpiece 1323.

In some embodiments, with reference to fig. 15, the earpiece 1313 is fixedly connected above the middle plate 181, and is electrically connected to a main board (not shown) on which the processor 110 is installed, and specifically, is electrically connected to the conversation filter 111 integrated on the processor 110, a sound guide channel 103 corresponding to the earpiece 1313 is disposed between the earpiece 1313 and the screen 150, a sound outlet hole 104 is disposed on the screen 150, one end of the sound guide channel 103 is connected to the earpiece 1313, and the other end of the sound guide channel 103 is communicated with the sound outlet hole 104. The earpiece 1323 is fixedly connected below the middle plate 181, electrically connected to a motherboard (not shown), and electrically connected to the cancellation filter 112 integrated on the processor 110, a sound guide channel 105 corresponding to the earpiece 1323 is disposed between the earpiece 1321 and the rear cover 170, the rear cover 170 is provided with a sound outlet 106 corresponding to the earpiece 1323, one end of the sound guide channel 105 is connected to the earpiece 1323, and the other end of the sound guide channel 105 is communicated with the sound outlet 106. The processor 110 processes the call audio signal to obtain a cancellation audio signal (electrical signal) and a second call audio signal (electrical signal). The second audio signal is transmitted to the earpiece 1313, and the earpiece 1313 vibrates the diaphragm in the earpiece 1313 under the action of the second audio signal to generate sound, so that the second audio signal is converted into a speech sound signal, and the speech sound signal is transmitted from the sound outlet hole 104 through the sound guide channel 103. The cancellation audio signal is sent to the earpiece 1323, and the earpiece 1323 makes the diaphragm in the earpiece 1323 vibrate and make sound under the action of the cancellation audio signal, so that the cancellation audio signal is converted into a cancellation sound signal, and the cancellation sound signal is sent out from the sound outlet hole 106 through the sound guide channel 105.

To accommodate the user's habits of receiving a call, in some embodiments, the earpiece 1313 is disposed proximate a top end of the electronic device 100. Illustratively, as shown in fig. 15, the earpiece 1313 is secured above the middle plate 181 and positioned adjacent to the top end of the electronic device 100.

In the following embodiment in which the first sound emitting unit 131 is the earpiece 1313, for convenience of description, the relationship between the earpiece 1313 and the earpiece 1323 will be described by taking the earpiece 1313 shown in fig. 14 fixedly connected above the middle plate 181 and disposed adjacent to the top end of the electronic device as an example.

In some embodiments, referring to fig. 15-17, earpiece 1313 and earpiece 1323 are disposed opposite one another along a thickness direction of electronic device 100. In this configuration, the earpiece 1313 and the earpiece 1323 are disposed opposite to each other in the thickness direction of the electronic device, which means that the earpiece 1313 and the earpiece 1323 as the sound source are located closer to each other, so that the sound leaked outside the ear of the speech signal transmitted through the earpiece 1313 can be cancelled well by the cancelling sound signal transmitted through the earpiece 1323, and the effect of cancelling the leaked sound is more significant.

Illustratively, with continued reference to fig. 15, the sound outlet 104 corresponding to the earpiece 1313 is disposed at the top end of the screen 150, the sound guide channel 103 corresponding to the earpiece 1313 is substantially parallel to the length direction (y direction) of the electronic device, the sound outlet 106 corresponding to the earpiece 1323 is disposed at the top end of the back cover 170, and the sound guide channel 105 corresponding to the earpiece 1323 is substantially parallel to the length direction (y direction) of the electronic device.

Exemplarily, referring to fig. 16, fig. 16 is different from fig. 15 in that a sound outlet hole 104 corresponding to an earpiece 1313 is disposed in a position near a screen 150 in a top end of the electronic device, specifically, the sound outlet hole 104 is disposed in a position near the screen 150 in a top end of a bezel 182, and a sound guide channel 103 is substantially parallel to a length direction (y direction) of the electronic device. The arrangement of the sound outlet hole 106 and the sound guiding channel 105 corresponding to the earpiece 1323 is the same as that in fig. 15, and will not be described again.

Exemplarily, referring to fig. 17, fig. 17 is different from fig. 15 in that a sound outlet 104 is disposed on a screen 150 and opposite to an earpiece 1313, a sound guide channel 103 is substantially parallel to a thickness direction (z direction) of the electronic device, a sound outlet 106 is disposed at a top end of a rear cover 170, and a sound guide channel 105 is substantially parallel to a length direction (y direction) of the electronic device.

The sound guide passage 105 and the sound outlet hole 106 corresponding to the earpiece 1323 are arranged similarly to the sound guide passage 103 and the sound outlet hole 104 corresponding to the earpiece 1313, and the sound guide passage 105 and the sound outlet hole 106 may have various configurations as well as those shown in fig. 15 to 16.

Illustratively, the sound outlet hole 106 is disposed in a top end of the electronic device near the rear cover 170 (not shown in the drawings), specifically, the sound outlet hole 106 is disposed in a top end of the frame 182 near the rear cover 170, and the sound guide channel 105 is substantially parallel to a length direction (y direction) of the electronic device. The detailed structure and description may refer to the description of the structure of the earpiece 1321, the sound guide channel 101, and the sound outlet hole 102 in fig. 5, and will not be described again.

Illustratively, the sound outlet hole 106 is provided on the back cover 170 and is disposed opposite to the earpiece 1323, and the sound guide passage 105 is substantially parallel to the thickness direction (z direction) of the electronic device. The specific structure can refer to the description of the structure of the earpiece 1321, the sound guide passage 101, and the sound outlet hole 102 in fig. 7.

For convenience of description, the positional relationship between the handset 1313 and the handset 1323 will be described by taking an example in which the sound outlet hole 104 corresponding to the handset 1313 is provided at the top end of the screen 150 and the sound outlet hole 106 corresponding to the handset 1323 is provided at the top end of the rear cover 170.

In other embodiments, referring to fig. 18, earpieces 1313 and 1323 are offset along the length (y-direction) of the electronic device.

In other embodiments, referring to fig. 19, earpieces 1313 and 1323 are staggered along a width direction (x-direction) of the electronic device.

Fig. 20 to 22 are schematic structural diagrams of an electronic device with a combined earpiece and exciter according to an embodiment of the present application. Another structure of the electronic device will be described below with reference to fig. 20 to 22.

Referring to fig. 20, the electronic device 100 includes a screen 150, a rear cover 170, a housing 180, and a sound emitting device having a first sound emitting unit 131 and a second sound emitting unit 132, wherein the screen 150 and the rear cover 170 are oppositely disposed on the housing 180 and are accommodated and fixed in the housing 180. For a detailed description of the screen 150, the rear cover 170 and the housing 180, reference may be made to the above description of fig. 5 for the above components, and the detailed description is omitted. However, in this embodiment, the first sound emitting unit 131 is an earpiece, denoted as earpiece 1314, disposed between the screen 150 and the middle plate 181, the electronic device 100 is provided with a sound guiding passage 107 and a sound emitting hole 108 corresponding to the earpiece 1314, and the second sound emitting unit 132 is an exciter, denoted as exciter 1324, disposed between the rear cover 170 and the middle plate 181. The processor 110 processes the call audio signal to obtain a cancellation audio signal (electrical signal) and a second call audio signal (electrical signal). The second communication audio signal is transmitted to the receiver 1314, and the receiver 1314 vibrates the diaphragm in the receiver 1314 to generate sound under the action of the second communication audio signal, so that the second communication audio signal is converted into a call sound signal, and the call sound signal is transmitted from the sound output hole 108 through the sound guide channel 107. The cancellation audio signal is sent to the exciter 1324, and the exciter 1324 generates vibration under the action of the cancellation audio signal, so as to drive the rear cover 170 to vibrate and make a sound, thereby converting the cancellation audio signal into a cancellation sound signal.

To accommodate the user's usage habits of receiving a call, in some embodiments, the earpiece 1314 is disposed proximate a top end of the electronic device 100. Illustratively, as shown in fig. 20, the earpiece 1314 is secured above the middle plate 181 and positioned adjacent to the top end of the electronic device 100.

It is understood that the sound emitting hole 108 and the sound guiding channel 107 may be disposed not only as shown in fig. 20, that is, the sound emitting hole 108 is disposed at the top of the screen 150, and the sound guiding channel 107 is substantially parallel to the length direction (y direction) of the electronic device, but also at other positions, which is not limited in this application.

In other embodiments, the sound outlet hole 108 is disposed in the top end of the electronic device adjacent to the screen 150 (not shown in the drawings), specifically, the sound outlet hole 108 is disposed in the top end of the frame 182 adjacent to the screen 150, and the sound guide channel 107 is substantially parallel to the length direction (y direction) of the electronic device. The detailed structure and description may refer to the description of the structure of the earpiece 1313, the sound guide channel 103, and the sound outlet hole 104 in fig. 15, and will not be described again.

In other embodiments, the sound outlet 108 is disposed on the screen 150 and opposite to the earpiece 1314 (not shown in the figure), and the sound guide channel 107 is substantially parallel to the thickness direction (z direction) of the electronic device. The detailed structure and description may refer to the description of the structure of the earpiece 1313, the sound guide channel 103, and the sound outlet hole 104 in fig. 16, and will not be described again.

It is understood that the exciter 1324 may be fixedly attached above the rear cover 170 as shown in fig. 20, or may be disposed at other positions, and the position of the exciter 1324 is not limited in this application.

In other embodiments, the exciter 1324 may be fixedly connected to the middle plate 181, and the exciter 1324 vibrates under the action of the cancellation audio signal to drive the middle plate 181 to vibrate and drive the rear cover 170 to generate sound.

In other embodiments, actuator 1322 may be fixedly attached to both middle plate 181 and back cover 170, and for the same reason, actuator 1322 is not limited in its location.

In the following embodiment in which the first sound emitting unit 131 is the earpiece 1314 and the second sound emitting unit 132 is the exciter 1324, for convenience of description, the relationship between the earpiece 1314 and the exciter 1324 will be described by taking as an example a structure in which the earpiece 1314 is fixedly attached above the middle plate 181 and adjacent to the top end of the electronic device 100, the sound emitting hole 108 is disposed at the top end of the screen 150, and the exciter 1324 is fixedly attached above the rear cover 170.

In some embodiments, referring to fig. 20, the earpiece 1314 and the exciter 1324 are oppositely disposed along a thickness direction of the electronic device 100. In this configuration, the arrangement of the earpiece 1314 and the exciter 1324 opposite to each other means that the earpiece 1314 and the exciter 1324 as a sound source are located at a short distance from each other, so that it is possible to cancel out the sound leaked to the outside of the ear from the call sound signal emitted from the earpiece 1314 by the canceling sound signal emitted from the exciter 1324 with good efficiency, and the effect of canceling the leaked sound is remarkable.

In other embodiments, referring to fig. 21, the earpiece 1314 and driver 1324 are staggered along the length (y-direction) of the electronic device.

In other embodiments, referring to fig. 22, the earpiece 1314 and driver 1324 are staggered along the width direction (x-direction) of the electronic device.

Referring to fig. 23, the electronic device 100 includes a screen 150, a rear cover 170, a case 180, and a sound emitting device. The sound emitting device may be a modified moving coil earpiece. The screen 150 and the rear cover 170 are oppositely disposed on the housing 180 and are accommodated and fixed in the housing 180, the screen 150 and the rear cover 170 are respectively disposed at the front end and the rear end of the housing 180, and the front end and the rear end of the housing 180 are both end portions in the thickness direction (z direction) of the electronic apparatus. Sound holes 109A and 109B are formed in the outer surface of the electronic device 100 at intervals, for example, the screen 150 is provided with the sound holes 109A, the rear cover 170 is provided with the sound holes 109B, the casing 180 includes a sound cavity containing a sound generating device, the sound generating device is electrically connected to the main board (not shown in the figure), the sound generating device and the sound cavity form two independent sound guiding channels 190A and 190B, the sound holes 109A are communicated with the sound guiding channels 190A, and the sound holes 109B are communicated with the sound guiding channels 190B. The sounding device comprises a first diaphragm group 10, a second diaphragm group 30, a first voice coil 20, a second voice coil 40 and a magnetic circuit system, wherein the first voice coil 20, the second voice coil 40 and the magnetic circuit system are positioned between the first diaphragm group 10 and the second diaphragm group 30, the first voice coil 20 and a first sounding unit of the first diaphragm group 10, the second voice coil 40 and the second diaphragm group 30 form a second sounding unit, the first sounding unit and the second sounding unit share the magnetic circuit system, under the action of the magnetic circuit system, a second voice communication audio signal obtained after processing of the processor is converted into a communication audio signal through the first sounding unit and sent out through the sound outlet 109A after passing through the sound guide channel 190A, and a counteracting audio signal obtained after processing of the processor is converted into a counteracting audio signal through the second sounding unit and sent out through the sound outlet 109B after passing through the sound guide channel 190B.

With reference to fig. 23, the first diaphragm group 10, the second diaphragm group 30, the first voice coil 20, and the second voice coil 40 are coaxially disposed, the first voice coil 20 is mounted on the first diaphragm group 10, the second voice coil 40 is mounted on the second diaphragm group 30, and a magnetic field is formed in the magnetic circuit system, wherein a north pole to a south pole of the generated magnetic field extends along the z-direction. The first voice coil 20 and the second voice coil 40 are opposite at intervals, and the first voice coil 20 and the second voice coil 40 are at least partially positioned in a magnetic field generated by a magnetic circuit system; the vibrations of the first voice coil 20 and the second voice coil 40 respectively provide driving forces for the first diaphragm group 10 and the second diaphragm group 30 to enable the first diaphragm group 10 and the second diaphragm group 30 to sound simultaneously, specifically, the second communication audio signal from the processor is sent to the first voice coil 20, the first voice coil 20 vibrates and drives the first diaphragm group 10 to vibrate so that the first diaphragm group 10 sounds, so as to convert the second communication audio signal into a communication audio signal, the cancellation audio signal from the processor is sent to the second voice coil 40, and the second voice coil 40 vibrates and drives the second diaphragm group 30 to vibrate so that the second diaphragm group 30 sounds, so as to convert the cancellation audio signal into the cancellation audio signal.

With continued reference to fig. 23, the magnetic circuit includes an inner magnet 60, an outer magnet 64, a first inner magnetic conductive plate 50, a second inner magnetic conductive plate 62, a first outer magnetic conductive plate 66, and a second outer magnetic conductive plate 55. The magnetic lines of force of the inner magnet 60 enter the first inner magnetic conductive plate 50 and are distributed around the first inner magnetic conductive plate 50, and the distributed magnetic field simultaneously enters the first outer magnetic conductive plate 66, enters the outer magnet 64 through the first outer magnetic conductive plate 66, then passes through the second outer magnetic conductive plate 55, enters the second inner magnetic conductive plate 62, and then returns to the inner magnet 60. The first sound generating unit formed by the first voice coil 20 and the first diaphragm group 10 and the second sound generating unit formed by the second voice coil 40 and the second diaphragm group 30 share the same magnetic circuit system to realize driving.

With continued reference to fig. 23, the first diaphragm assembly 10 includes a first diaphragm 11 and a first dome 12, the first dome 12 is disposed on a side of the first diaphragm 11 away from the second diaphragm assembly 30, and the first voice coil 20 is disposed on a side of the first diaphragm 11 close to the second diaphragm assembly 30. The second diaphragm group 30 includes a second diaphragm 31 and a second dome 32, the second dome 31 is disposed on one side of the second diaphragm 31 far away from the first diaphragm group 10, and the second voice coil 40 is disposed on one side of the second diaphragm 31 near the first diaphragm group 10. For example, the first and second voice coils 20 and 40 may be rectangular ring bodies. Illustratively, the first dome 12 and the second dome 32 may be planar.

It should be understood that the sound emitting hole 109A in this embodiment may be disposed not only on the screen 150, but also on the top of the electronic device 100, and similarly, the sound emitting hole 109B may be disposed not only on the rear cover 170, but also on the top of the electronic device 100, and the application is not limited in any way.

The structure of the electronic device according to the embodiment of the present application is described in detail with reference to fig. 5 to 23, and the method of processing a signal according to the embodiment of the present application is described in detail with reference to fig. 24 and 25, and mainly the process of determining the coefficients of the call filter and the cancellation filter is described.

In the embodiment of the present application, in order to obtain the coefficients of the filter, a system may be provided, where the system includes a sound detection device, a processing device, an electronic device including a sound generation device, and a head model, the sound detection device is disposed around the electronic device, the sound detection device is connected to the processing device, and the electronic device is held near the ears of the head model to simulate a scene in which a person answers a call. For example, the sound detection device may be a microphone, the processing device may be any device with data processing capability, for example, the processing device may be a computer, the sound generation device in the electronic device may implement two-way sound generation, and the electronic device may be an electronic device as in any embodiment corresponding to fig. 5 to 23. In the implementation process, the electronic device is input with downlink audio signals, two paths of basically same sound signals emitted by the sound generating device are used for obtaining sound field models of a plurality of positions outside the electronic device through the sound detecting device, the expected value of the intensity (called sound intensity for short) of the sound signals obtained by superposing the emitted two paths of sound signals at each position is used as a target value, and the processing device can reversely deduce the coefficients of the two filters through the target value and the sound field models. In this way, the obtained coefficient of the filter is given to the filter in the electronic equipment, and the two paths of sound signals obtained after the first call audio signal passes through the two filters can realize the effect of canceling the leakage sound.

It should be noted that, in this embodiment, two paths of substantially identical sound signals emitted by the sound generating device according to the downstream audio signal are signals without being processed by the filter, and the coefficients of the two filters capable of achieving the effect of canceling the leakage sound can be inversely derived by obtaining the sound field model of such sound signals and the desired target value. Fig. 24 is a schematic flow chart of a method 300 for signal processing provided by an embodiment of the present application, which can be executed by a processing device, and fig. 25 is a schematic diagram of sound field distribution when a user answers a call provided by the present application.

S310, determining a first sound transfer function and a second sound transfer function.

The sound transfer function may represent a transmission distribution (i.e., sound field distribution) of a sound signal between an input terminal representing a position where a sound source is located and a receiving terminal representing a position where the sound signal emitted from the sound emitting unit can be reached outside the electronic device. The sound field distribution between any two locations can be represented by an acoustic transfer function.

The two sound production units of the electronic equipment of the process respectively produce sound, and the two sound production units are used as sound sources for sound production. The first sound emitting unit may be the first sound emitting unit 131 in any one of the embodiments corresponding to fig. 5 to 23, and may be combined with the call filter 111 to obtain the second call sound signal, which is exemplarily disposed near the front surface (e.g., the screen 150) of the electronic device. The second sound generating unit may be the second sound generating unit 132 in any of the embodiments corresponding to fig. 5 to 23, and may be combined with the cancellation filter 112 to obtain the above-mentioned cancellation call signal, for example, the second sound generating unit is disposed near the back surface (e.g., the back cover 170) of the electronic device. When a user answers a call, the first sound generating unit is close to the ear, and the second sound generating unit is far away from the ear, so that the effect of offsetting the sound leakage can be realized.

The electronic equipment is input with downlink audio signals, the downlink audio signals respectively emit approximately same sound signals from different positions of the electronic equipment after passing through the first sound generating unit and the second sound generating unit, and the downlink audio signals are transmitted to the outside of the electronic equipment through the air. Since the first sound emitting unit and the second sound emitting unit are located at different positions of the electronic device, the sound signals emitted from the two sound emitting units and approximately the same sound signal are transmitted to different positions outside the electronic device. The processing means may determine the sound transfer function of each sound emitting unit to each location outside the electronic device from the sound signal at each location picked up by the sound detecting means. Wherein, the set of sound transfer functions from the first sound generating unit to each of the plurality of locations outside the electronic device may be denoted as a first sound transfer function, the set of sound transfer functions from the second sound generating unit to each of the plurality of locations outside the electronic device may be denoted as a second sound transfer function, and the first sound transfer function and the second sound transfer function form a sound field model.

In this process, the plurality of positions outside the electronic device includes two types of positions, i.e., an in-ear position and a sound leakage position, and the description of the in-ear position and the sound leakage position may refer to the above description. It should be noted that, if conditions allow, the greater the number of the positions of the leakage sound during the measurement, the better, the relatively accurate coefficients of the filter can be obtained to cancel the leakage sound at the more positions of the leakage sound.

In the embodiment of the present application, the number of the in-ear positions and the number of the leakage positions may be one or more, and may be determined according to the actual calculation capability, the accuracy of the coefficients of the filter, and the like, and the embodiment of the present application is not limited at all. Since the area of the in-ear position is much smaller relative to the area of the leakage position, one in-ear position and a plurality of leakage positions may be predefined in order to simplify the model.

Referring to fig. 25, when the user 200 answers the phone, the electronic device 100 is close to the ear 201, the sound signal emitted from the first sound emitting unit of the electronic device 100 is transmitted around the whole formed by the electronic device 100 and the user 200, a part of the sound signal enters the ear, i.e., is transmitted to the ear-in position, another part of the sound signal is transmitted to a sound leakage position outside the electronic device and outside the ear, the sound signal emitted from the second sound emitting unit of the electronic device is also transmitted around, most of the sound signal is transmitted to the sound leakage position, and a small part of the sound signal may be transmitted to the ear-in position. In fig. 25, the position of the ear 201 can be understood as the in-ear position of the electronic device 100, and each position (or each point) in the sound field distribution diagram of the circular area formed in the figure can be understood as a sound leakage position. Illustratively, the leaky sound positions may be collectively represented by distances and angles, and one distance and one angle may uniquely represent one leaky sound position. Assuming that the area of the sound field distribution diagram is circular, the center of the area formed by the electronic device 100 and the user 200 is used as a circle center, the position of the front of the user is used as a preset position, the position of the preset position is defined as 0 degree, the angles in the counterclockwise direction are sequentially increased, the angles between different sound leakage positions and the preset position are different, the radial distance of the circle represents the distance from the circle center to the sound leakage position, in order to simplify the model, the distance from the circle center to the sound leakage position can also be simplified to the distance from the first sound generating unit or the second sound generating unit to the sound leakage position, and for the same sound leakage position, the distance from the first sound generating unit to the sound leakage position can be considered to be the same as the distance from the second sound generating unit to the sound leakage position. Taking an angle of 90 degrees from the preset position as an example, positions at different radial distances from the center of the circle represent different sound leakage positions, for example, a position at 90 degrees and 30 centimeters from the center of the circle represents a sound leakage position (a position shown by a black dot in the figure). Taking the distance of 30 cm from the center as an example, the positions at different angles from the preset position represent different sound leakage positions, for example, the position at 30 cm from the center and at 120 angle represents another sound leakage position (the position shown by another black dot in the figure).

In the embodiment of the present application, let the sound transfer function of the first sound generating unit to any position be h, where h is a row vector, and h ═ h₀ h₁ ... h_N-1]N represents the length of the sound transfer function, or N represents the length of a filter (call filter or cancel filter), N is an integer greater than or equal to 1, and the set of sound transfer functions from the first sound-emitting unit to each position is denoted as H. Illustratively, H may satisfy the following first formula:

H＝[h_in h_k]＝[h_in h_{i_j}]＝[h_in h_{0_30} h_{30_30} ... h_{270_30} ... h_{0_50} h_{30_50} ... h_{270_50} ...]

h_inrepresenting the sound transfer function of the first sound-generating unit to the ear-entrance position, h_kThe sound transfer function from the first sound emitting unit to the kth sound leakage position is shown, the kth sound leakage position can be any position shown in fig. 25 and represented by an angle and a distance, the value of k traverses preset m sound leakage positions, m is an integer greater than or equal to 1, and m is related to i and j. h is_{i_j}Or may also represent a sound transfer function from the first sound emitting unit to the kth sound leakage position, i represents an angle between the kth sound leakage position and a preset position, for example, the preset position may be a position of 0 degree where the front of the user is located as shown in fig. 25, j represents a distance from the first sound emitting unit to the kth sound leakage position, and a value of i traverses a preset m₁The value of j traverses the preset m₂A distance, m ═ m₁×m₂。

Similarly, the sound transfer function of the second sound generating unit to any position is denoted as g, g ═ g₀ g₁ ... g_N-1]G is a row vector, and N is explained above, and the set of sound transfer functions from the second sound generating unit to each position is denoted as. Illustratively, G may satisfy the following second formula:

G＝[g_in g_k]＝[g_in g_{i_j}]＝[g_in g_{0_30} g_{30_30} ... g_{270_30} ... g_{0_50} g_{30_50} ... g_{270_50} ...]

g_inrepresenting the sound transfer function of the second sound-generating unit to the ear-in position, g_kThe sound transfer function from the second sound generating unit to the kth sound leakage position is shown, and the description of the kth sound leakage position may refer to the above description and is not repeated. However, when i and j are used to indicate the position of the leakage sound, j indicates the distance from the second sound generating unit to the kth position of the leakage sound for the second sound generating unit.

It is understood that, as described above, in order to simplify the model, the distance from the first sound generation unit to the kth leakage position may be considered to be the same as the distance from the second sound generation unit to the kth leakage position.

S320, determining the coefficient of the call filter and the coefficient of the cancellation filter according to the first sound transfer function, the second sound transfer function and the target value.

The target value indicates the magnitude of the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit superimposed at each of the above positions. For the in-ear position, the sound intensity of the two paths of sound signals after being superposed at the in-ear position is expected to be not greatly different from the sound intensity of the sound signal emitted from the first sound emitting unit at the in-ear position, and for the sound leakage position, the sound intensity after being superposed at the sound leakage position is expected to be smaller so as to achieve the effect of canceling the sound leakage.

In some embodiments, a first preset condition may be set for the superimposed sound intensity at the sound leakage position, so that the magnitude of the superimposed sound intensity of the two paths of sound signals at the sound leakage position satisfies the first preset condition. For example, the first preset condition may be that the sound intensity of the two sound signals after being superimposed at the sound leakage position is less than or equal to a third threshold, and for example, the third threshold may be determined according to the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position. Illustratively, the third threshold may be 5%, 3%, or the like of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position. In other words, the sound intensity of the two sound signals after superposition at the sound leakage position is less than or equal to 5%, 3%, and the like of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

In other embodiments, for the superimposed sound intensity at the sound leakage position, ideally, the magnitude of the superimposed sound intensity of the two paths of sound signals at the sound leakage position is equal to 0. In other words, the sound intensity of the sound signal emitted from the first sound emitting unit at the position of the leakage sound can be cancelled by the sound signal emitted from the second sound emitting unit, so as to achieve the effect of canceling the leakage sound.

In some embodiments, a second preset condition may be set for the sound intensity after being superimposed at the in-ear position, so that the magnitude of the sound intensity after being superimposed at the in-ear position of the two paths of sound signals satisfies the second preset condition. For example, the second preset condition may be that the sound intensity of the two sound signals after being superimposed at the ear entrance position is greater than or equal to a fourth threshold, for example, the fourth threshold may be determined according to the sound intensity of the sound signal emitted from the first sound emitting unit at the ear entrance position. Illustratively, the fourth threshold may be 90%, 95%, etc. of the sound intensity of the sound signal emitted from the first sound emitting unit at the in-ear position.

In other embodiments, the sound intensity of the two sound signals superimposed at the in-ear position is ideally the same as the sound intensity of the sound signal emitted from the first sound emitting unit at the in-ear position. In other words, compared to the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position, the sound intensity of the two sound signals superimposed at the in-ear position is not cancelled, but remains as constant as possible.

In the embodiment of the present application, for example, the coefficients of the call filter and the coefficients of the cancel filter may be determined by a least square method from the first sound transfer function, the second sound transfer function, and the target value. Of course, other modeling methods may be used to determine the coefficients of the two filters, and the present application is not limited in any way.

In some embodiments, the third formula may be satisfied between the first sound transfer function, the second sound transfer function, the target value, and the coefficient of the filter. Illustratively, the third formula may be:

wherein F represents a Fourier transform matrix, H represents a first acoustic transfer function, H^TRepresenting the transpose of H, G representing the second sound transfer function, G^TDenotes the transpose of G, R _1 denotes the coefficient of the call filter, which is a row vector of length N, R _2 denotes the coefficient of the cancellation filter, which is a row vector of length N, D denotes the target value.

Illustratively, the value of D may satisfy the fourth formula: d ═ 11.. 100.. 0]^T。

Where the length of D is N × (m +1), where N represents the length of the filter and m represents the number of leak sound locations. In the value of D, the first N values are 1, which represents that the sound intensity of the two sound signals after being superimposed at the ear-entering position is 1, that is, the sound intensity of the two sound signals after being superimposed at the ear-entering position is the same as the sound intensity of the sound signal emitted from the first sound-emitting unit at the ear-entering position and cannot be cancelled, and the remaining (nxm) value is 0, which represents that the sound intensity of the two sound signals after being superimposed at the sound-leaking position is 0, that is, the sound intensity of the sound signal emitted from the first sound-emitting unit at the sound-leaking position can be completely cancelled.

And transforming the third formula to obtain a coefficient R _1 of the call filter and a coefficient R _2 of the cancellation filter, wherein the R _1 and the R _2 can be expressed by a fifth formula. Illustratively, the fifth formula may be:

in other embodiments, for some leak positions with serious leak, different weights may be added to the leak positions to adjust the cancellation performance of each leak position.

Illustratively, the coefficients of the call filter and the coefficients of the cancellation filter are determined using a weighted least squares method based on the first sound transfer function, the second sound transfer function, and the target value.

Illustratively, the first sound transfer function, the second sound transfer function, the target value, R _1, and R _2 may satisfy a sixth formula by which R _1 and R _2 may be obtained. Illustratively, the sixth formula may be:

wherein W is a diagonal matrix of dimension [ N (m +1) ] × [ N (m +1) ], i.e. W is a diagonal matrix of N (m +1) rows and N (m +1) columns, the value on each diagonal is between 0 and 1, the size of the value indicates the importance of the corresponding position, the larger the value, the larger the importance of the corresponding position, and vice versa. Hereinafter, the process of determining the coefficients of the two filters will be described in detail, exemplarily, by specific numerical values in combination with the first to fifth formulas. It should be understood that the process of determining the coefficients of the two filters by using the first to fourth formulas and the sixth formula is similar to the process of determining the coefficients of the two filters by using the first to fifth formulas, and reference may be made to the related description, and details are not repeated herein.

Example one

Illustratively, in this embodiment, the length of the filter (or the length of the sound transfer function) N is 1, the number of the leak positions m is 4, k spans 1-4, and the 4 leak positions are positions at four angles of 0 degree, 90 degrees, 180 degrees, and 270 degrees and the same distance, respectively.

The first formula: h ═ H_in h_k]＝＝[0.6 0.3 0.5 0.25 0.01]，

Wherein h is_in＝[0.6]，h_k＝[0.3 0.5 0.25 0.01]

The second formula: g ═ G_in g_k]＝＝[0.7 0.35 0.45 0.15 0.02]，

Wherein, g_in＝[0.7]，g_k＝[0.35 0.45 0.15 0.02]

The fourth formula: d ═ 10000]^T，

Substituting H, G and D into the third equation, the following results were obtained:

and obtaining R _1 and R _2 according to a fifth formula:

therefore, the coefficient of the call filter is R _1 ═ 2.681, and the coefficient of the cancellation filter is R _2 ═ 3.3061.

Example two

Exemplarily, in this embodiment, the length N of the filter (or the length of the sound transfer function) is 2, the number m of the leak sound positions, which are positions located at 90 degrees, is 1.

The first formula:

wherein the content of the first and second substances,

the second formula:

wherein the content of the first and second substances,

the fourth formula: d ═ 1100]^T，

Substituting F, H, G and D into the fifth equation, the following results were obtained:

therefore, the coefficient of the call filter is R _1 ═ 1.58 to 8.34, and the coefficient of the cancellation filter is R _2 ═ 1.9310.53.

After the coefficients of the call filter and the cancellation filter are obtained by the method 300 described above, with continued reference to figure 4, a call filter 111 and a cancellation filter 112 having corresponding coefficients and a sound emitting device 130 having two sound emitting units may be provided in the electronic apparatus 100, the call filter 111 being electrically connected to the first sound emitting unit 131, the cancellation filter 112 being electrically connected to the second sound emitting unit 132, during a call, the signal processed by the call filter 111 for the first call audio signal may emit a call sound signal through the first sound emission unit 131, the signal processed by the cancellation filter 112 for the first call audio signal may emit a cancellation sound signal through the second sound emitting unit 132, the sound intensity of the call sound signal and the cancellation sound signal after being superposed at the ear-entering position is larger than that after being superposed at the sound leakage position. Therefore, the sound intensity at the sound leakage position can be offset, the sound intensity at the ear-entering position can not be offset, and the sound intensity at the ear-entering position can not be offset under the ideal condition.

It can be further understood that, in combination with the above-mentioned process of determining the coefficients of the call filter and the cancellation filter, in the electronic device 100 having the call filter and the cancellation filter, the call sound signal emitted from the electronic device 100 can be transmitted to a plurality of locations outside the electronic device through the first sound transfer function, and the cancellation sound signal can be transmitted to a plurality of locations outside the electronic device through the second sound transfer function, so that the sound intensity of the two paths of sound signals superimposed at the sound leakage position is small, and the sound intensity superimposed at the ear entrance position is large, thereby achieving the desired effect similar to the target value.

Fig. 26 is a schematic block diagram of an apparatus 400 for signal processing provided by an embodiment of the present application. The apparatus may be a processing apparatus as described above in method 300, and apparatus 400 includes a processing unit 410. In some embodiments, a functional module or a processor having a processing function in the apparatus 400 may be considered as a processing unit of the apparatus.

The processing unit 410 may be configured to perform the following steps:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the ear entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

In some embodiments, the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

In some embodiments, the superimposed sound intensity at the leak position is equal to 0.

In some embodiments, the fourth threshold is 90% of the sound intensity at the in-ear position of the sound signal emitted from the first sound-emitting unit.

In some embodiments, the superimposed sound intensity at the in-ear position is equal to the sound intensity of the sound signal emitted from the first sound emitting unit at the in-ear position.

In some embodiments, the processing unit 410 is specifically configured to:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

In some embodiments, the talk filter and the cancellation filter are Finite Impulse Response (FIR) filters.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The same or similar parts between the various embodiments in this application may be referred to each other. In the embodiments and the implementation methods/implementation methods in the embodiments in the present application, unless otherwise specified or conflicting in logic, terms and/or descriptions between different embodiments and between various implementation methods/implementation methods in various embodiments have consistency and can be mutually cited, and technical features in different embodiments and various implementation methods/implementation methods in various embodiments can be combined to form new embodiments, implementation methods, or implementation methods according to the inherent logic relationships thereof. The above-described embodiments of the present application do not limit the scope of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (28)

1. An electronic device, comprising:

the processor is used for processing the first call audio signal to obtain a second call audio signal and a cancellation audio signal;

the sound generating device is connected with the processor and comprises a first sound generating unit and a second sound generating unit, wherein the first sound generating unit is used for sending a call sound signal according to the second communication audio signal, the second sound generating unit is used for sending a cancellation sound signal according to the cancellation audio signal, so that the call sound signal and the cancellation sound signal are in the sound intensity after superposition at the sound leakage position outside the electronic equipment is smaller than or equal to a first threshold value, and the call sound signal and the cancellation sound signal are in the sound intensity after superposition at the ear entrance position outside the electronic equipment is larger than or equal to a second threshold value.

2. The electronic device according to claim 1, the first sound emitting unit and the second sound emitting unit being disposed oppositely along a thickness direction of the electronic device.

3. The electronic device according to claim 1 or 2, wherein the electronic device comprises a middle plate, and a screen and a rear cover which are oppositely arranged on both sides of the middle plate, the first sound generating unit is arranged between the middle plate and the screen, and the second sound generating unit is arranged between the middle plate and the rear cover.

4. The electronic device of claim 3, wherein the first sound generating unit is an exciter, the second sound generating unit is an earphone, the electronic device further comprises a first sound outlet hole and a first sound guiding channel, the first sound outlet hole is disposed on the rear cover, and two ends of the first sound guiding channel are respectively communicated with the first sound outlet hole and the second sound generating unit.

5. The electronic device of claim 4, wherein the first sound outlet is disposed at a top end of the rear cover.

6. The electronic device of claim 3, wherein the first sound emitting unit and the second sound emitting unit are both actuators.

7. The electronic device according to claim 3, wherein the first sound emitting unit and the second sound emitting unit are both earphones, the electronic device further comprises a second sound guiding channel, a third sound guiding channel, and a second sound emitting hole and a third sound emitting hole which are arranged at intervals, the second sound emitting hole is arranged on the screen, two ends of the second sound guiding channel are respectively communicated with the second sound emitting hole and the first sound emitting unit, the third sound emitting hole is arranged on the rear cover, and two ends of the third sound guiding channel are respectively communicated with the third sound emitting hole and the second sound emitting unit.

8. The electronic device according to claim 7, wherein the second sound emitting hole is provided at a top end of the screen, or wherein the third sound emitting hole is provided at a top end of the rear cover.

9. The electronic device of claim 3, wherein the first sound generating unit is an earpiece, the second sound generating unit is an exciter, the electronic device further comprises a fourth sound guiding channel and a fourth sound outlet, the fourth sound outlet is disposed on the screen, and two ends of the fourth sound guiding channel are respectively communicated with the fourth sound outlet and the first sound generating unit.

10. The electronic device of claim 9, wherein the fourth sound outlet is disposed at a top end of the screen.

11. The electronic device of any of claims 1-10,

the first threshold is 5% of the sound intensity of the call sound signal at the sound leakage position; or the like, or, alternatively,

the second threshold is 90% of the sound intensity of the call sound signal at the in-ear position.

12. The electronic device of any of claims 1-11, wherein a call filter and a cancellation filter are integrated on the processor, the call filter configured to process the first call audio signal to obtain the second call audio signal, the cancellation filter configured to process the first call audio signal to obtain the cancellation audio signal, coefficients of the call filter and coefficients of the cancellation filter being determined based on a first sound transfer function, a second sound transfer function, and a target value, wherein,

the call sound signal is propagated to a plurality of positions outside the electronic device through the first sound transfer function, the cancellation sound signal is propagated to the plurality of positions through the second sound transfer function, the target value represents the sound intensity of the sound signal which is emitted from the first sound emitting unit and the second sound emitting unit based on the first call sound signal and is not processed by the call filter and the cancellation filter after being superimposed at each position, and the plurality of positions include the sound leakage position and the ear insertion position.

13. The electronic device of claim 12, wherein the talk filter and the cancellation filter are Finite Impulse Response (FIR) filters.

14. A method of signal processing, the method comprising:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the ear entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

15. The method according to claim 14, wherein the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

16. The method according to claim 14 or 15, wherein the superimposed sound intensity at the location of the leakage sound is equal to 0.

17. The method of any of claims 14 to 16, wherein the fourth threshold is 90% of the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

18. The method according to any one of claims 14 to 17, wherein the superimposed sound intensity at the in-ear position is equal to the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

19. The method of any one of claims 14 to 18, wherein determining coefficients of a speech filter and coefficients of a cancellation filter based on the first sound transfer function, the second sound transfer function, and a target value comprises:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

20. The method of any of claims 14 to 19, wherein the talk filter and the cancellation filter are Finite Impulse Response (FIR) filters.

21. An apparatus for signal processing, the apparatus comprising a processing unit configured to:

determining a first sound transfer function and a second sound transfer function, the first sound transfer function comprising a sound transfer function from a first sound emitting unit in an electronic device to a plurality of locations outside the electronic device, the second sound transfer function comprising a sound transfer function from a second sound emitting unit in the electronic device to the plurality of locations, the plurality of locations comprising an in-ear location and a sound leakage location, the first sound emitting unit and the second sound emitting unit emitting sound based on a downstream audio signal;

and determining a coefficient of a call filter and a coefficient of a cancellation filter according to the first sound transfer function, the second sound transfer function and a target value, wherein the target value represents the sound intensity of the sound signals emitted from the first sound emitting unit and the second sound emitting unit after being superposed at each position, the sound intensity superposed at the sound leakage position is less than or equal to a third threshold value, and the sound intensity superposed at the sound entrance position is greater than or equal to a fourth threshold value, wherein the signal processed by the call filter can emit the call sound signal through the first sound emitting unit, and the signal processed by the cancellation filter can emit the cancellation sound signal through the second sound emitting unit.

22. The apparatus of claim 21, wherein the third threshold is 5% of the sound intensity of the sound signal emitted from the first sound emitting unit at the sound leakage position.

23. The apparatus according to claim 21 or 22, wherein the superimposed sound intensity at the location of the leakage sound is equal to 0.

24. The apparatus of any of claims 21-23, wherein the fourth threshold is 90% of the sound intensity of the sound signal emitted from the first sound-emitting unit at the in-ear position.

25. The apparatus according to any one of claims 21 to 24, wherein the superimposed sound intensity at the in-ear position is equal to the sound intensity at the in-ear position of the sound signal emitted from the first sound-emitting unit.

26. The apparatus according to any one of claims 21 to 25, wherein the processing unit is specifically configured to:

and determining the coefficient of the call filter and the coefficient of the cancellation filter by using a least square method according to the first sound transfer function, the second sound transfer function and the target value.

27. The apparatus of any of claims 21-26, wherein the talk filter and the cancellation filter are Finite Impulse Response (FIR) filters.

28. A computer storage medium, comprising: a processor coupled with a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 14 to 20.

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