WO2021241864A1 - Method for correcting characteristics of microphone and electronic device thereof - Google Patents

Abstract

Disclosed is an electronic device comprising a microphone and a processor for controlling audio gain of the microphone. The processor may provide a first unit of information regarding a first signal to the microphone, the microphone may generate the first signal on the basis of the first unit of information, generate a second signal on the basis of an analog signal acquired by the microphone in response to generation of the first signal, and provide a second unit of information regarding the second signal to the processor, and the processor may perform a control operation to change the audio gain of the microphone on the basis of the first unit of information and the second unit of information. Various other embodiments identified from the specification are also possible.

Description

Method and electronic device for calibrating the characteristics of a microphone

Embodiments disclosed in this document relate to a microphone included in an electronic device.

Recently, as functions supported by portable terminals increase, the size of the terminal increases or the shape of the terminal (eg, a foldable terminal) is diversified. These changes may affect the performance of the electronic device. For example, in a microphone, which is a function of a terminal, a signal length between a processor and a microphone varies according to the size, shape, and number of microphones of the terminal.

In communication between the processor and the microphone, the processor of the electronic device transmits a clock signal CLK to the microphone while changing the driving strength. Meanwhile, the microphone may transmit data corresponding to the signal to the processor as a fixed current value to perform communication.

The processor of the electronic device according to an embodiment may adjust the current for providing the clock signal CLK by adjusting the drive strength, but the microphone cannot adjust the current for providing the signal. Therefore, depending on the size and shape of the terminal, the parasitic capacitance changes as the signal length between the microphone and the processor changes, and even if the microphone signal is deteriorated, it cannot be flexibly responded and it is not easy to improve it.

In addition, although an error may occur with respect to an audio gain for each produced microphone unit, a difference may occur in voice input/output performance of an electronic device because the produced microphone gain is fixed.

The electronic device according to an embodiment disclosed in this document may include at least one microphone and a processor electrically connected to the at least one microphone and controlling an audio gain of the first microphone. . the processor provides first information about a first signal to the at least one microphone, the at least one microphone generates the first signal based on the first information, and in response to the generation of the first signal to generate second information about a second signal based on the analog signal obtained by the at least one microphone, and provide information about the second signal to the processor, wherein the processor includes: the first information and the The audio gain of the at least one microphone may be changed based on the second information.

Also, in the method of operating an electronic device according to an embodiment disclosed in this document, the processor provides first information about a first signal to a first microphone, and the first information based on the obtained first information generating a first signal through a microphone, generating a second signal based on an analog signal obtained by the microphone in response to generation of the first signal, generating second information about the second signal, The method may include providing the second information to a processor and controlling the audio gain of the first microphone to be changed based on the first information and the second information.

In addition, the electronic device according to an embodiment disclosed in this document includes at least one microphone including a first microphone, electrically connected to the at least one microphone, and controls driving strength and audio gain of the at least one microphone. It may include a processor that wherein the processor provides first information about a first signal to the at least one microphone, the at least one microphone generates the first signal based on the information, and in response to the generation of the first signal, Generates a second signal based on the analog signal acquired through the microphone, and provides information about the second signal to the processor, wherein the processor receives the first information about the first signal and the provided second signal At least one of a first parameter corresponding to the driving strength of the at least one microphone and a second parameter corresponding to the audio gain may be changed based on the second information about the at least one microphone.

According to various embodiments disclosed in this document, the processor may adjust drive strength to reduce current consumption and improve audio signal quality.

According to various embodiments, after the processor analyzes the gain of the microphone, it may be adjusted to improve the gain of the microphone.

In addition, according to various embodiments, the user's convenience in using audio may be improved by reducing a gain difference between the audio signal input or output of the electronic device.

In addition, various effects directly or indirectly identified through this document may be provided.

1 illustrates an electronic device according to an embodiment.

2 is a diagram illustrating an internal configuration of a foldable electronic device according to an exemplary embodiment.

3 is a configuration diagram of a microphone and a processor according to an embodiment.

4 is an operation flowchart illustrating a process in which a microphone and a processor perform communication according to an embodiment.

5 is a diagram illustrating a process of calibrating a microphone using an external speaker according to an exemplary embodiment.

6 is a flowchart illustrating a process in which a microphone receives first information and generates second information according to an exemplary embodiment.

7 is an operation flowchart illustrating a process in which a processor corrects characteristics of a microphone according to an exemplary embodiment.

8 is a diagram illustrating input and output performance of a microphone in an audible frequency band according to an embodiment.

9 is a diagram illustrating input and output performance of a microphone in an ultrasonic band according to an exemplary embodiment.

10 is a diagram illustrating performance of a microphone as a transceiver in an ultrasonic band according to an embodiment.

11 is a diagram illustrating tuning of driving strength and audio gain in an electronic device according to an exemplary embodiment.

12 is a block diagram of an electronic device in a network environment, according to various embodiments of the present disclosure;

1 illustrates an electronic device 100 according to an embodiment.

In an embodiment, the electronic device 100 includes a display 140 , a housing 150 , a plurality of microphones (eg, 111 , 113 , 115 ), a speaker 131 , a receiver 133 , and a first function key 162 . ), a second function key 164 may be included. In an embodiment, some components may be omitted or additional components may be further included. In an embodiment, some of the components are combined to form a single entity, and functions of the components prior to the combination may be identically performed.

In an embodiment, the housing 150 may fix or embed the display 140 , a plurality of microphones (eg, 111 , 113 , 115 ), the receiver 133 , and the speaker 131 . The housing 150 may include a front housing, a rear housing, and a side housing. At least one opening for exposing the plurality of microphones (eg, 111 , 113 , 115 ), the speaker 131 or the receiver 133 may be disposed in at least one of the front, rear, or side housing of the housing 150 . have.

In an embodiment, at least a portion of the display 140 may be exposed through the front surface of the housing 150 . The display 140 may include a backlight, a display panel, a touch sensor, a pressure sensor, a fingerprint sensor, and the like.

In an embodiment, the receiver 133 may be disposed in the first area of the housing, for example, on the upper portion of the housing. The speaker 131 may be disposed in the second area of the housing 150 , for example, under the housing. According to various embodiments, the electronic device 100 includes a plurality of microphones (eg, 111, 113, and 115), and the plurality of microphones (eg, 111, 113, and 115) are provided on the front, side, or rear of the housing. can be placed.

In an embodiment, the electronic device 100 may include the processor 120 inside the electronic device 100 . The processor 120 may be electrically connected to a plurality of microphones (eg, 111 , 113 , 115 ) and a communication circuit. Distances between the processor 120 and the microphones (eg, 111 , 113 , and 115 ) may be different. The processor 120 may provide a clock signal CLK to a plurality of microphones (eg, 111 , 113 , and 115 ).

In an embodiment, a plurality of microphones (eg, 111 , 113 , and 115 ) may be disposed in a portion of the housing. For example, the second microphone 113 and the third microphone 115 are disposed close to the speaker 131 , and the second microphone 113 is the first of the housing 150 when viewed from the front of the display 140 . The third microphone 115 may be biased toward the second side of the housing 150 when viewed from the front of the display 140 . The first microphone 111 may be disposed close to the receiver 133 . The positions of the microphones are merely exemplary and are not limited thereto.

In an embodiment, at least one physical key may be disposed on a side portion of the electronic device 100 . For example, the first function key 162 for turning on/off the display or turning on/off the power of the electronic device 100 may be disposed on the right edge with respect to the front surface of the electronic device 100 . In an embodiment, the second function key 164 for controlling the volume or screen brightness of the electronic device 100 may be disposed on the left edge with respect to the front surface of the electronic device 100 . In addition to this, additional buttons or keys may be disposed on the front or rear of the electronic device 100 . For example, a physical button or a touch button mapped to a specific function may be disposed in a lower region of the front bezel.

2 is a diagram 200 illustrating an internal configuration of a foldable electronic device according to an exemplary embodiment.

In an embodiment, the electronic device 100 may be implemented as a foldable electronic device including a flexible display, and the electronic device 100 may include a first housing 201 and a second housing 203 . can The second housing 203 may be rotatably connected to the first housing 201 with respect to the folding shaft 250 . The first housing 201 and the second housing 203 may have an overall symmetrical shape with respect to the folding axis 250 . The second housing 203 may be rotated (or rotated) with respect to the first housing 201 so that the first housing 201 and the second housing 203 may face each other.

In an embodiment, the processor 120 may include at least one of an application processor, a communication processor, a codec 210 , and a memory 310 , and may have a plurality of cores.

In an embodiment, the codec 210 and the memory 310 may be disposed separately from the processor 120 and may be electrically connected to the processor 120 . The processor 120 may control at least one other component or execute a communication-related operation or data processing. The processor 120 may be implemented the same as or at least a part of the processor (the processor 1220 of FIG. 12 ).

In an embodiment, the processor 120 may control the codec to output a signal of a specified frequency band. The signal of the designated frequency band may be a signal of a constant magnitude or a signal of a non-uniform magnitude. The non-uniform signal may include, for example, at least one of a sine wave, a square wave, or a sawtooth wave.

In an embodiment, the codec 210 may be disposed in the same housing as the microphones (eg, 111 , 113 , and 115 ). For example, the first microphone 111 to the third microphone 115 may be disposed in the first housing 201 , and the codec 210 may also be disposed in the first housing 201 . Alternatively, the first microphone 111 to the third microphone 115 may be disposed in the second housing 203 , and the codec 210 may also be disposed in the second housing 203 .

In one embodiment, the codec 210 may be disposed in a different housing than the microphones (eg, 111 , 113 , 115 ). For example, the first microphone 111 to the third microphone 115 may be disposed in the first housing 201 , and the codec 210 may be disposed in the second housing 203 . Alternatively, the first microphone 111 to the third microphone 115 may be disposed in the second housing 203 , and the codec 210 may be disposed in the first housing 201 .

In an embodiment, the codec 210 may be electrically connected to a plurality of microphones (eg, 111 , 113 , and 115 ). The codec 210 and the signal length 220 between the microphones may be different. For example, the signal length between the codec 210 and the first microphone 111 may be the first length. A signal length between the codec 210 and the second microphone 113 may be a second length. A signal length between the codec 210 and the third microphone 115 may be a third length.

In an embodiment, the battery 230 may be disposed in the first housing 201 or the second housing 203 , and both the first housing 201 and the second housing 203 may be disposed. The battery 230 may supply current consumed to transmit a signal from the microphone 110 to the codec 210 or the processor 120 , and transmit a signal from the codec 210 or the processor 120 to the microphone 110 . It can supply the consumed current.

In one embodiment, the microphone 110 may be disposed in both the first housing 201 and the second housing 203 . For example, the first microphone 111 may be disposed in the first housing, and the second microphone 113 and the third microphone 115 may be disposed in the second housing. Alternatively, the first microphone 111 and the second microphone 113 may be disposed in the first housing 201 , and the third microphone 115 may be disposed in the second housing 203 .

3 is a block diagram 300 of the microphone 110 and the processor 120 according to an embodiment.

In an embodiment, the processor 120 may include at least one of a digital signal processor (DSP) 305 and a memory 310 . DSP 305 or memory 310 may be disposed separately from processor 120 . The processor 120 may be implemented the same as or at least a part of the processor (the processor 1220 of FIG. 12 ).

In one embodiment, the at least one microphone comprises a SWR soundwire interface (I/F) 315 , a signal controller 320 , a signal generator 325 , and a micro electro mechanical systems (MEMS) 330 . ), charge pump (335), PGA (pre gain amplifier) (340), ADC (analog to digital converter) (345), digital gain amplifier 350, PDM I/F (pulse density modulation interface) It may include at least one of 355 and buffer 360 .

According to an embodiment, the memory 310 may store first information about a first signal (eg, a pilot tone). The first information stored in the memory 310 may be provided to the microphone 110 through the codec 210 , and the first information may be obtained from the microphone 110 through a soundwire (SWR) interface 315 . The interface 315 may be implemented as an inter integrated circuit (I2C). The first information may include at least one of an amplitude, a frequency, a waveform, or a magnitude value of the first signal.

In an embodiment, when receiving first information corresponding to the first signal, the signal generator 325 may generate a first signal based on the first information. The signal generator 325 may be electrically connected to the MEMS 330 , and may transmit the generated first signal to the MEMS 330 . The first signal may mean a pilot signal generated through the signal generator 325 .

In an embodiment, the MEMS 330 may serve as a transceiver. The MEMS 330 may perform at least one of transmission and reception. For example, the MEMS 330 may vibrate the diaphragm by receiving the first signal, and may output a signal in response to the vibration. The MEMS 330 may obtain a signal in which the output signal is reflected.

In an embodiment, the charge pump 335 is electrically connected to the MEMS 330 and may be configured to increase or decrease a voltage in the MEMS 330 .

In an embodiment, the PGA 340 may receive a signal obtained through the MEMS 330 to amplify the signal strength. The obtained signal is a signal corresponding to the first signal, and may be a pilot signal input to the microphone 110 .

In an embodiment, the ADC 345 may convert an analog signal into a digital signal. For example, the ADC 345 may convert at least one of a signal obtained by externally reflecting a signal output from the MEMS 330 or a signal obtained by outputting an external speaker into a digital signal.

In an embodiment, the digital gain amplifier 350 may amplify a digital signal converted by the ADC 345 . When the processor 120 determines that it is not necessary to change the audio gain through the signal conditioner 320 , the microphone 110 may not amplify the digital signal. When the processor 120 determines that it is necessary to change the audio gain, the microphone 110 may amplify the digital signal through the signal conditioner 320 . When the processor 120 determines that the audio gain should be amplified by the first intensity, the microphone 110 may amplify the digital signal by the first intensity in the digital gain amplifier 350 .

In an embodiment, the amplified digital signal may be stored in the buffer 360 through the PDM interface 355 . The buffer 360 may receive a set value for drive strength by the signal conditioner 320 . The buffer 360 may apply the set value for the driving strength to the amplified digital signal. The buffer 360 may transmit information about the stored digital signal to the processor 120 .

4 is an operation flowchart 400 illustrating a process in which a microphone and a processor perform communication according to an embodiment.

In operation 410 according to an embodiment, the processor 120 may provide first information about a first signal (eg, a pilot signal) to the microphone. The processor 120 may provide the first information to the microphone through a soundwire (SWR) interface. The first information may include at least one of an amplitude, a frequency, a waveform, or a magnitude value of the first signal.

In operation 420 according to an embodiment, the microphone 110 may generate a first signal based on the first information obtained from the processor 120 . A signal generator (eg, the signal generator 325 of FIG. 3 ) may convert the first information into a first signal. The first signal may be a pilot signal. The pilot signal may be a signal using a specific frequency band. The specific frequency band may mean a band of about 7 kHz to about 10 kHz or about 50 kHz.

In operation 430 according to an embodiment, the microphone 110 may acquire an analog signal in response to the generation of the first signal. The first signal may be referred to as a pilot signal. The first signal may be transmitted to a MEMS (eg, MEMS 330 of FIG. 3 ) diaphragm. The microphone 110 may generate an analog signal by vibrating the diaphragm included in the MEMS 330 through the transmitted first signal. The microphone 110 may output the generated analog signal to the outside.

In operation 440 according to an embodiment, the microphone (eg, the microphone 110 of FIG. 1 ) may generate second information about the second signal based on the obtained analog signal. The second information may include at least one of an amplitude, a frequency, a waveform, or a magnitude value of the second signal. The acquired analog signal may be a signal returned by reflecting an analog signal output through the MEMS 330 (eg, an analog signal generated based on a pilot signal). The analog signal may have a sinusoidal wave shape or a square wave shape. In addition, the analog signal may be a signal of a certain intensity in a specific frequency band. The PGA 340 may amplify the second signal generated in response to the vibration of the diaphragm included in the MEMS 330 . The ADC 345 may convert the amplified second signal into a digital signal. The digital gain amplifier 350 may amplify the converted digital signal. The signal conditioner 320 may control the amplification value of the digital signal. For example, the signal conditioner 320 may adjust the digital signal based on the difference in audio gain through comparison of the intensity value (or amplitude value) for the first signal and the intensity value (or amplitude value) for the second signal. You can control the amplification value.

In operation 450 according to an embodiment, the microphone 110 may provide the second information. The microphone 110 may provide second information about the second signal to the processor 120 . The microphone 110 may temporarily store the second information in the buffer 360 before providing the second information to the processor 120 .

In operation 460 according to an embodiment, the processor 120 may control to change the audio gain based on the first information and the second information. The processor 120 may compare the intensity value (or amplitude value) of the first signal and the intensity value (or amplitude value) of the second signal. The processor may control to change the audio gain when the difference between the audio gain values exceeds a preset range through the comparison. The processor 120 may control to change the audio gain by comparing the first information stored in the memory 310 with the second information input to the processor 120 .

5 is a diagram 500 illustrating a process of calibrating a microphone using an external speaker according to an exemplary embodiment.

In an embodiment, FIG. 5 may show a process of calibrating a microphone through a signal output from the external speaker 505 . The external speaker 505 may be a speaker of the electronic device 100 . In the microphone 110 , the signal generator 325 and the MEMS 330 output portion may be omitted. The omitted signal generator and MEMS 330 output portion may be replaced with an external speaker 505 or a speaker 131 of the electronic device 100 .

In an embodiment, when the pilot signal is output from the external speaker 505, the external speaker 505 may be located in a direction facing the microphone. The external speaker 505 may be disposed in a direction in which the microphone transmits and/or receives a voice signal. The external speaker 505 may be disposed at an angle within 30 degrees from the above direction to transmit a voice signal to the microphone of the electronic device.

In an embodiment, the speaker 131 of the electronic device 100 may mean a speaker for transmitting and/or receiving a signal in the same direction as that of the microphone. For example, the speaker 131 of the electronic device 100 may be used to correct characteristics of the second microphone 113 or the third microphone 115 .

In an embodiment, the receiver 133 of the electronic device 100 may perform the same role as the speaker 131 . The receiver 133 may output a pilot signal like a speaker. For example, the receiver 133 may be for correcting characteristics of the first microphone (eg, the first microphone 111 of FIG. 1 ).

In an embodiment, the first microphone 111 may receive a signal output by the receiver 133 . For example, the first microphone 111 may receive a signal output by the receiver 133 and reflected back by an external object. As another example, the first microphone 111 may directly receive the signal output by the receiver 133 .

In operation 510 according to an embodiment, the external speaker 505 may provide an analog signal (eg, a pilot signal) to the microphone 110 . The external speaker 505 may be the speaker 131 of the electronic device 100 . The analog signal may be a pilot signal in a frequency band of about 7 kHz to 10 kHz or about 50 kHz.

In operation 520 according to an embodiment, the microphone 110 may generate a second signal based on the acquired analog signal. The microphone 110 may generate second information based on the second signal. This operation may correspond to operation 440 of FIG. 4 .

In operation 530 according to an embodiment, the processor 120 may control to change at least one of an audio gain and a driving strength based on the first information and the second information. The driving strength may be referred to as drive capability, and in general, as the driving strength increases, the operational stability of the memory 310 may be improved and current consumption may increase. The second information may be information corresponding to an analog signal output by the external speaker 505 or the electronic device 100 .

6 is a flowchart illustrating a process in which a microphone receives first information and generates second information according to an exemplary embodiment.

In operation 610 according to an embodiment, the microphone 110 may obtain first information about the first signal from the processor 120 . The microphone 110 may acquire the first information through a soundwire (SWR) interface.

In operation 620 according to an embodiment, the microphone 110 may transmit the first information to a signal generator (eg, the signal generator 325 of FIG. 3 ). The signal generator 325 may obtain the first information and generate a digital signal based on the first information. The generated digital signal may be referred to as a first signal. The frequency of the first signal may be about 7-10 kHz or about 50 kHz.

In operation 630 according to an embodiment, the microphone 110 may provide the first signal to the MEMS 330 . MEMS 330 may include a diaphragm. The diaphragm included in the MEMS 330 may vibrate in response to receiving the first signal. The MEMS 330 may generate an analog signal in response to vibration of the diaphragm.

In operation 640 according to an embodiment, the microphone 110 may output an analog signal based on the vibration of the diaphragm included in the MEMS 330 to the outside. The MEMS 330 may output an analog signal corresponding to the first signal that is a digital signal to the outside. The electronic device 100 may be placed in a chamber and output the analog signal toward a first surface of the chamber. The distance between the electronic device 100 and the first surface of the chamber may be 50 cm to 1 m.

In operation 650 according to an embodiment, the microphone 110 may acquire an externally reflected analog signal from the MEMS. The externally reflected analog signal may vibrate the diaphragm included in the MEMS 330 . The diaphragm included in the MEMS 330 may generate a second signal in response to the input of the analog signal.

In operation 660 according to an embodiment, the microphone 110 may generate second information about the second signal through a pre gain amplifier (PGA) and an analog to digital converter (ADC). The PGA 340 may amplify the second signal based on the analog signal obtained through the MEMS 330 . The ADC 345 may convert the amplified second signal into a digital signal.

7 is an operation flowchart 700 illustrating a process in which a processor corrects characteristics of a microphone according to an exemplary embodiment.

In operation 710 according to an embodiment, the processor 120 may set the driving strength of the microphone as a first value. For example, the processor 120 may set the setting value for the driving strength of the microphone to 1 mA. The set value for the driving strength may be transmitted to the signal controller 320 .

In operation 720 according to an embodiment, the processor 120 may provide first information about the first signal to the microphone 110 . The processor 120 may provide first information about the first signal stored in the memory 310 to the microphone 110 through the SWR interface 315 . The microphone 110 may transmit the first information to the signal generator 325 . The signal generator 325 may generate a first signal that is a pilot signal based on the first information. The first signal may be transmitted to the MEMS 330 . The MEMS 330 may generate an analog signal based on the first signal using the transmitted first signal diaphragm. The MEMS 330 may output the analog signal to the outside and the MEMS 330 may receive the externally reflected analog signal. The MEMS 330 may generate a second signal based on the received analog signal. The received analog signal may mean at least one of an analog signal output from the MEMS 330 and reflected from the outside, and an analog signal output from the external speaker 505 . The external speaker 505 may include a speaker of an electronic device.

In operation 730 according to an embodiment, the processor 120 may obtain second information about the second signal from the microphone.

In an embodiment, the microphone 110 may amplify the second signal through the PGA 340 . The ADC 345 may digitally convert the amplified second signal to generate second information. The digital amplifier 350 may receive the digitized second information and amplify the second information. The digital amplifier 350 may apply an amplification value based on the signal conditioner 320 . At least a portion of the amplified second information may be stored in the buffer 360 . The amplified second information may be provided to the processor 120 through the PDM interface 355 .

In operation 740 according to an embodiment, the processor 120 may compare the first information and the second information. The processor 120 may compare the first information stored in the memory 310 with the second information obtained from the microphone. The processor 120 may compare at least one of a waveform, a magnitude value, an amplitude value, or a voltage value included in the first information and the second information.

In operation 750 according to an embodiment, the processor 120 may determine whether a change in driving strength is necessary. The processor 120 may determine whether the signal acquired by the microphone 110 cannot be transmitted to the processor 120 because the current driving strength of the microphone 110 is low. Whether the current driving strength is low may be determined using an eye diagram, which will be described in detail below with reference to FIG. 11 . When the processor 120 determines that a change in the driving strength is necessary, operation 755 is performed, and when the processor 120 determines that the change in the driving strength is not necessary, operation 760 is performed.

In operation 755 according to an embodiment, the processor 120 may change the driving strength. When it is determined that the driving strength needs to be changed, the processor 120 may perform a correction to increase or decrease the driving strength of the microphone.

In operation 760 according to an embodiment, the processor 120 may determine whether an audio gain change is necessary. The processor 120 may compare the audio gain value included in the first information with the audio gain value included in the second information. The processor 120 may determine whether the audio gain needs to be changed by comparing the magnitude value of the first signal corresponding to the first information and the magnitude value of the second signal corresponding to the second information. The processor 120 may determine whether an audio gain change is necessary by comparing amplitude values of the first signal and the second signal.

In an embodiment, when the difference between the audio gain value included in the first information and the audio gain value included in the second information is equal to or greater than a specified first size, the processor 120 determines that the audio gain needs to be changed by the difference. can do. For example, when the audio gain value included in the first information is 60 dB and the audio gain value included in the second information is 52 dB, since there is a difference by 8 dB, the processor 120 adjusts the audio gain by 8 dB. Changes may be deemed necessary.

In an embodiment, when the difference between the audio gain value included in the first information and the audio gain value included in the second information is less than the first magnitude, the processor 120 may determine that there is no need to change the audio gain. For example, when the difference range preset in the processor 120 is 5 dB, if the audio gain value included in the first information is 60 dB and the audio gain value included in the second information is 58 dB, the difference value is 2 dB Since it is within the preset range, it can be determined that there is no need to change the audio gain. The first size may mean a range preset in the processor 120 . However, the preset range is merely an example, and may vary according to a set value of the range.

In operation 765 according to an embodiment, the processor 120 may change the audio gain. The processor 120 may compare the audio gains and change the audio gain when the difference between the gain values exceeds a preset range. When the current audio gain value exceeds the reference audio gain value, the processor 120 may perform downward correction as much as it exceeds the reference audio gain value. If the current audio gain value is smaller than the reference audio gain value, the processor 120 may perform upward correction by a small amount.

8 is a diagram 800 illustrating input and output performance of a microphone in an audible frequency band according to an embodiment.

In an embodiment, in the graph 810 , data on a horizontal axis may be a frequency, and data on a vertical axis may be a sound pressure level. In the graph 810, the range of the horizontal axis data may mean an audio frequency band. The audio frequency band may include 100 Hz to 10 kHz.

In an embodiment, graph 810 shows output sound pressure characteristics for each frequency of 100 Hz to 100 kHz when a signal is output through the MEMS 330 included in the microphone (eg, the microphone 110 of FIG. 1 ). Referring to the graph 810, it can be seen that the sound pressure of the low frequency band of 1 kHz or less is relatively small, and the high frequency band of 7 kHz or more has a high output level of 60 dB or more. The processor 120 may set a signal of a high frequency band of 7 kHz or higher as a pilot signal. The microphone 110 may generate the pilot signal in response to the setting of the processor. The microphone 110 may generate an analog signal in response to the generation of the pilot signal and output it to the outside.

In an embodiment, the graph 820 may represent a sound pressure level relative to a sound pressure level corresponding to 1 kHz for each frequency. In the audible frequency band 821 , a dotted line 823 may indicate an upper specification limit line and a lower specification limit line. A solid line 825 may represent a magnitude with respect to sound pressure. Referring to the graph 820, it can be seen that the magnitude (magnitude), which is the sound pressure level, increases as it approaches 10000 Hz, and this result may correspond to the contents in the graph 810.

9 is a diagram 900 illustrating input and output characteristics of a microphone in an ultrasonic band according to an embodiment.

In an embodiment, graph 910 shows output characteristics in an ultrasonic band of a microphone (eg, the microphone 110 of FIG. 1 ). The graph 910 may represent a frequency characteristic when a signal of an ultrasound band higher than an audible frequency is output to the MEMS 330 . In the graph 910, data on the horizontal axis may be frequency (kHz), and data on the vertical axis may be sound pressure level [dB]. The ultrasonic band may include 20 kHz to 120 kHz. Graph 910 shows output sound pressure characteristics for each frequency of 20 kHz to 120 kHz when a signal is output through the MEMS 330 included in the microphone.

In an embodiment, referring to graph 910 , it can be seen that when a signal of an ultrasonic band of 50 kHz to 60 kHz and 90 kHz to 110 kHz is output, the output sound pressure level is higher than 60 dB.

In an embodiment, referring to graph 910 , when the output voltage of the microphone 110 is set to 3V, 5V, or 8V, the sound pressure level may be indicated. It can be seen that the higher the output voltage, the higher the output sound pressure level. When the reference output sound pressure level is 60dB, if the output voltage is set to 3V, the current consumption can be reduced while maintaining the output sound pressure level.

In an embodiment, graph 920 shows input characteristics in an ultrasonic band of a microphone (eg, the microphone 110 of FIG. 1 ). The graph 920 may represent a frequency characteristic when a signal of an ultrasound band higher than an audible frequency is input to the MEMS 330 . The ultrasonic band may include 20 kHz to 120 kHz. Graph 920 shows characteristics for each frequency of 20 kHz to 120 kHz when a signal is output through the MEMS 330 included in the microphone.

In an embodiment, referring to graph 920 , it can be seen that when a pilot signal of an ultrasound band of about 50 kHz is input to the MEMS 330 , the input characteristic is higher than that of other frequency bands.

In one embodiment, referring to FIG. 9 , it can be seen that both outputting and inputting a signal of an ultrasound band to the MEMS 330 of the microphone are possible. Combining Graph 910 and Graph 920, it can be seen that the ultrasonic band having excellent output performance and input performance is about 50 kHz.

10 is a diagram 1000 illustrating the performance of a microphone as a transceiver in an ultrasonic band according to an embodiment.

In an embodiment, the MEMS 330 may serve as a transceiver in the form of a transmitter and a receiver combined. For example, the MEMS 330 may transmit an analog signal to the outside and receive an analog signal reflected from the outside.

According to an embodiment, the graph 1010 may represent the performance of integrating the input and output performance of the ultrasonic band of the microphone. Referring to the graph 1010, it can be seen that the performance of the input and output of the MEMS 330 is excellent at about 50 kHz in the ultrasonic frequency band. The processor 120 may control the reference frequency of the pilot signal to be set to about 50 kHz.

11 is a diagram 1100 illustrating driving strength and audio gain tuning in an electronic device.

In an embodiment, FIG. 1110 may show an eye diagram 1112 according to driving strength corresponding to 2 mA and 8 mA. The eye diagram 1112 is an index that enables intuitive or qualitative judgment about the quality of data or the defect of circuit equipment to the extent of the size of the eye opening. In general, it can be determined that the signal quality is deteriorated as the shape of the eye becomes blurred and closed.

In an embodiment, when the driving strength is set to 2 mA, it can be confirmed that the eye diagram 1112 touches the diamond shape 1114 . When the driving strength is set to 2 mA, it is shown that the driving strength is not sufficient, and it can be seen that correction should be made in the direction of increasing the driving strength of the microphone.

In one embodiment, when the driving intensity is set to 8 mA, the size of the eye shape in the eye diagram 1112 is larger than the eye size when the driving intensity is set to 2 mA, so it can be confirmed that the diamond shape 1114 does not touch. have. When the driving strength is set to 8 mA, it shows that the driving strength is sufficient, and it can be seen that the microphone needs to be corrected in the direction of maintaining or reducing the driving strength.

In an embodiment, the processor 120 may set the driving strength setting value of the microphone 110 to 1 mA. The processor 120 may set a signal controller 320 and a signal generator 325 of the microphone to fit in a band of about 7 to 10 kHz or about 50 kHz. The microphone 110 may output a signal in a band of about 7 to 10 kHz or about 50 kHz based on the set driving strength of 1 mA. The microphone 110 may receive a signal reflected from the outside after outputting the signal. The microphone 110 may transmit the received signal to the processor 120 . The processor 120 may compare the received pilot signal with at least one of the first signal stored in the memory and the first information corresponding to the first signal.

In an embodiment, when the eye shape of the eye diagram 1112 is small and touches the diamond shape 1114, the processor 120 performs a comparison operation while gradually increasing the driving strength value of the microphone as shown in Table 1 below. can be repeatedly performed. The processor 120 may perform the comparison operation until the waveform that is confirmed as normal is input, and then set the value at that time when the waveform is confirmed to be normal as the driving intensity value. After it is confirmed as normal, the correction operation for the driving strength of the microphone may be finished.

Setting value	drive strength
00	1mA
01	2mA
10	4mA
11	16mA

In an embodiment, <Table 1> may refer to a microphone drive strength setting table. A memory (eg, the memory 310 of FIG. 3 ) may store a set value corresponding to the driving intensity value as a binary number in order to store the driving intensity value as a digital value. For example, a driving intensity of 1 mA may be stored as 00, and a driving intensity of 2 mA as 01 may be stored. The above table is an example, and the memory 310 may have various setting values.

In an embodiment, the graph 1120 may represent an audio gain value for the first information and an audio gain value for the second information. The graph 1120 may represent the first information corresponding to the first signal and the second information corresponding to the second signal as magnitude values according to time.

In an embodiment, when the difference between the audio gain value included in the first information and the audio gain value included in the second information is equal to or greater than a first magnitude, the processor 120 may correct the gain by the difference. When the difference between the audio gain value included in the first information and the audio gain value included in the second information is less than the first magnitude, the processor 120 may not perform audio gain correction. The first size may mean a range preset in the processor 120 . The range may be 5 dB. For example, when the range preset in the processor is 5 dB, if the audio gain value included in the first information is 60 dB and the audio gain value included in the second information is 58 dB, the difference value is preset to 2 dB Since it is within the range, calibration may not be performed. As another example, when the audio gain value included in the first information is 60 dB and the audio gain value included in the second information is 52 dB, since there is a difference by 8 dB, the processor 120 controls to compensate upward by 8 dB can do. The processor 120 may determine the comparison of the audio gain value corresponding to the first information and the audio gain value corresponding to the second information by comparing the amplitude. However, the above range is merely an example, and may vary depending on a set value of the range.

Setting value	Audio gain
00	-2dB
01	-1dB
10	+1dB
11	+2dB

In an embodiment, <Table 2> may refer to an audio gain setting table. A memory (eg, the memory 310 of FIG. 3 ) may store a set value corresponding to the audio gain value as a binary number in order to store the audio gain value as a digital value. For example, an audio gain of -2 dB may be stored as 00 and an audio gain of +1 dB as 10. The above table is an example, and the memory 310 may have various setting values.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. However, this document is not intended to limit the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives of the embodiments of the present invention.

12 is a block diagram of an electronic device 1201 (eg, the electronic device 100 of FIG. 1 ) in the network environment 1200 according to various embodiments of the present disclosure. Referring to FIG. 12 , in a network environment 1200 , the electronic device 1201 communicates with the electronic device 1202 through a first network 1298 (eg, a short-range wireless communication network) or a second network 1299 . It may communicate with the electronic device 1204 or the server 1208 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 1201 may communicate with the electronic device 1204 through the server 1208 . According to an embodiment, the electronic device 1201 includes a processor 1220 (eg, the processor 120 of FIG. 1 ), a memory 1230 (eg, the memory 310 of FIG. 3 ), an input device 1250 , Sound output device 1255, display device 1260, audio module 1270, sensor module 1276, interface 1277, haptic module 1279, camera module 1280, power management module 1288, battery 1289 (eg, the battery 230 of FIG. 2 ), a communication module 1290 , a subscriber identification module 1296 , or an antenna module 1297 . In some embodiments, at least one of these components (eg, the display device 1260 or the camera module 1280 ) may be omitted or one or more other components may be added to the electronic device 1201 . In some embodiments, some of these components may be implemented as a single integrated circuit. For example, the sensor module 1276 (eg, a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented while being embedded in the display device 1260 (eg, a display).

The processor 1220, for example, executes software (eg, a program 1240) to execute at least one other component (eg, a hardware or software component) of the electronic device 1201 connected to the processor 1220. It can control and perform various data processing or operations. According to an embodiment, as at least part of data processing or operation, the processor 1220 may store a command or data received from another component (eg, the sensor module 1276 or the communication module 1290) into the volatile memory 1232 . may be loaded into , process commands or data stored in the volatile memory 1232 , and store the resulting data in the non-volatile memory 1234 . According to an embodiment, the processor 1220 includes a main processor 1221 (eg, a central processing unit or an application processor), and a secondary processor 1223 (eg, a graphic processing unit or an image signal processor) that can be operated independently or together with the main processor 1221 (eg, a graphics processing unit or an image signal processor). , a sensor hub processor, or a communication processor). Additionally or alternatively, the auxiliary processor 1223 may be configured to use less power than the main processor 1221 or to specialize in a designated function. The auxiliary processor 1223 may be implemented separately from or as a part of the main processor 1221 .

The coprocessor 1223 may be, for example, on behalf of the main processor 1221 while the main processor 1221 is in an inactive (eg, sleep) state, or when the main processor 1221 is active (eg, executing an application). ), together with the main processor 1221, at least one of the components of the electronic device 1201 (eg, the display device 1260, the sensor module 1276, or the communication module 1290) It is possible to control at least some of the related functions or states. According to an embodiment, the coprocessor 1223 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 1280 or the communication module 1290). have.

The memory 1230 may store various data used by at least one component of the electronic device 1201 (eg, the processor 1220 or the sensor module 1276). The data may include, for example, input data or output data for software (eg, the program 1240 ) and instructions related thereto. The memory 1230 may include a volatile memory 1232 or a non-volatile memory 1234 .

The program 1240 may be stored as software in the memory 1230 , and may include, for example, an operating system 1242 , middleware 1244 , or an application 1246 .

The input device 1250 may receive a command or data to be used by a component (eg, the processor 1220 ) of the electronic device 1201 from the outside (eg, a user) of the electronic device 1201 . The input device 1250 may include, for example, a microphone, a mouse, a keyboard, or a digital pen (eg, a stylus pen).

The sound output device 1255 may output a sound signal to the outside of the electronic device 1201 . The sound output device 1255 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback, and the receiver can be used to receive an incoming call. According to an embodiment, the receiver may be implemented separately from or as a part of the speaker.

The display device 1260 may visually provide information to the outside (eg, a user) of the electronic device 1201 . The display device 1260 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the corresponding device. According to an embodiment, the display device 1260 may include a touch circuitry configured to sense a touch or a sensor circuit (eg, a pressure sensor) configured to measure the intensity of a force generated by the touch. have.

The audio module 1270 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 1270 acquires a sound through the input device 1250 or an external electronic device (eg, a sound output device 1255 ) directly or wirelessly connected to the electronic device 1201 . The sound may be output through the electronic device 1202) (eg, a speaker or a headphone).

The sensor module 1276 detects an operating state (eg, power or temperature) of the electronic device 1201 or an external environmental state (eg, user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 1276 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 1277 may support one or more designated protocols that may be used for the electronic device 1201 to directly or wirelessly connect with an external electronic device (eg, the electronic device 1202 ). According to an embodiment, the interface 1277 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 1278 may include a connector through which the electronic device 1201 can be physically connected to an external electronic device (eg, the electronic device 1202 ). According to an embodiment, the connection terminal 1278 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 1279 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 1279 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 1280 may capture still images and moving images. According to an embodiment, the camera module 1280 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 1288 may manage power supplied to the electronic device 1201 . According to an embodiment, the power management module 388 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

The battery 1289 may supply power to at least one component of the electronic device 1201 . According to an embodiment, the battery 1289 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 1290 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 1201 and an external electronic device (eg, the electronic device 1202, the electronic device 1204, or the server 1208). It can support establishment and communication performance through the established communication channel. The communication module 1290 operates independently of the processor 1220 (eg, an application processor) and may include one or more communication processors supporting direct (eg, wired) communication or wireless communication. According to an embodiment, the communication module 1290 may include a wireless communication module 1292 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 1294 (eg, : It may include a LAN (local area network) communication module, or a power line communication module). A corresponding communication module among these communication modules may be a first network 1298 (eg, a short-range communication network such as Bluetooth, WiFi direct, or infrared data association (IrDA)) or a second network 1299 (eg, a cellular network, the Internet, or It can communicate with an external electronic device through a computer network (eg, a telecommunication network such as a LAN or WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 1292 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 1296 within a communication network such as the first network 1298 or the second network 1299 . The electronic device 1201 may be identified and authenticated.

The antenna module 1297 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module may include one antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 1297 may include a plurality of antennas. In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 1298 or the second network 1299 is connected from the plurality of antennas by, for example, the communication module 1290 . can be selected. A signal or power may be transmitted or received between the communication module 1290 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, RFIC) other than the radiator may be additionally formed as a part of the antenna module 1297 .

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( eg commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 1201 and the external electronic device 1204 through the server 1208 connected to the second network 1299 . Each of the electronic devices 1202 and 1204 may be the same or a different type of the electronic device 1201 . According to an embodiment, all or part of the operations performed by the electronic device 1201 may be executed by one or more of the external electronic devices 1202 , 1204 , or 1208 . For example, when the electronic device 1201 needs to perform a function or service automatically or in response to a request from a user or other device, the electronic device 1201 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. The one or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 1201 . The electronic device 1201 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this purpose, for example, cloud computing, distributed computing, or client-server computing technology may be used.

The electronic device according to various embodiments disclosed in this document may be a device of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. In this document, "A or B", "at least one of A and B", "at least one of A or B," "A, B or C, " "at least one of A, B and C, " and "A , B, or C" each may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other components in question, and may refer to components in other aspects (e.g., importance or order) is not limited. that one (eg, first) component is "coupled" or "connected" to another (eg, second) component with or without the terms "functionally" or "communicatively" When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

As used herein, the term “module” may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logic block, component, or circuit. A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

According to various embodiments of the present disclosure, one or more instructions stored in a storage medium (eg, internal memory 1236 or external memory 1238) readable by a machine (eg, electronic device 1201) may be implemented as software (eg, the program 1240) including For example, a processor (eg, processor 1220 ) of a device (eg, electronic device 1201 ) may call at least one command among one or more commands stored from a storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to an embodiment, the method according to various embodiments disclosed in this document may be provided by being included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or via an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed online (eg download or upload), directly between smartphones (eg smartphones). In the case of online distribution, at least a part of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

According to various embodiments of the present disclosure, the electronic device 100 is electrically connected to at least one microphone including the first microphone 111 , the at least one microphone, and a communication circuit, and provides an audio gain of the at least one microphone. gain), wherein the processor 120 provides first information about a first signal to the at least one microphone, and the at least one microphone is based on the first information to generate the first signal, generate second information about a second signal based on an analog signal acquired by the at least one microphone in response to the generation of the first signal, and information about the second signal to the processor 120 , and the processor 120 may control to change the at least one audio gain based on the first information and the second information.

In an embodiment, the processor 120 may set the initial driving intensity as a first value.

In an embodiment, the processor 120 controls to change the driving strength of the at least one microphone based on the first information and the second information, and the first information and the second information are each It may include at least one of an amplitude value, a frequency, and a waveform for the first signal and the second signal.

In an embodiment, the at least one microphone may include a signal generator 325 and generate a first signal through the signal generator 325 .

In an embodiment, the processor 120 compares the magnitude values included in the first information and the second information and, when the difference between the magnitude values is equal to or greater than the first magnitude, corrects the audio gain by the difference.

In an embodiment, the first signal may be a pilot signal having a constant frequency among a frequency band of 7 kHz to 10 kHz or 50 kHz.

In an embodiment, the processor 120 may change at least one of a parameter for a driving strength and a parameter for an audio gain based on the first information and the second information.

In an embodiment, the analog signal may be generated through a diaphragm included in the MEMS 330 of the at least one microphone or may be generated through at least one of an external speaker and a speaker of the electronic device.

In an embodiment, the second signal may be a signal generated when the analog signal vibrates a diaphragm included in the MEMS 330 .

In an embodiment, the processor 120 may include at least one of an application processor (AP), a memory, and a codec.

According to various embodiments of the present disclosure, in the method of operating an electronic device, the processor 120 provides first information about a first signal to at least one microphone including a first microphone, based on the obtained first information. generating a first signal through the at least one microphone; generating a second signal based on an analog signal obtained by the at least one microphone in response to generation of the first signal; may include generating second information about the microphone, providing the second information to a processor, and controlling the audio gain of the at least one microphone to be changed based on the first information and the second information. .

In an embodiment, the processor 120 sets the initial driving intensity to a first value, controls the driving intensity of the at least one microphone based on the first information and the second information, and controls the driving intensity of the at least one microphone, the first information and The second information may include at least one of an amplitude value, a frequency, and a waveform for the first signal and the second signal, respectively.

In an embodiment, the controlling to change the audio gain includes comparing the amplitude values of the first information and the second information and compensating for the gain by the difference when the difference in the amplitude values is equal to or greater than a first magnitude. may include

In an embodiment, the analog signal is generated through a diaphragm included in the MEMS 330 of the at least one microphone or is generated through at least one of an external speaker and a speaker of the electronic device, and the second signal is the analog signal The signal may be a signal generated by shaking the diaphragm included in the MEMS 330 .

In an embodiment, the processor 120 may change at least one of a parameter for a driving strength and a parameter for an audio gain based on the first information and the second information.

In various embodiments, the electronic device includes at least one microphone including a first microphone, a processor electrically connected to the at least one microphone, and controlling driving strength and audio gain of the at least one microphone, wherein the processor provides first information about a first signal to the at least one microphone, the at least one microphone generates the first signal based on the information, and in response to the generation of the first signal, Generates a second signal based on the analog signal acquired through the microphone, and provides information about the second signal to the processor, wherein the processor receives the first information about the first signal and the provided second signal At least one of a first parameter corresponding to the driving strength of the at least one microphone and a second parameter corresponding to the audio gain may be controlled based on the second information about the at least one microphone.

In an embodiment, the processor 120 sets the initial driving intensity to a first value, controls the driving intensity of the at least one microphone based on the first information and the second information, and the first information and the second information may include at least one of an amplitude value, a frequency, and a waveform for the first signal and the second signal, respectively.

In an embodiment, the at least one microphone may include a signal generator 325 and generate the first signal through the signal generator 325 .

In an embodiment, the first signal may be a pilot signal having a constant frequency among a frequency band of 7 kHz to 10 kHz or 50 kHz.

In an embodiment, the analog signal is generated through a diaphragm included in the MEMS 330 of the at least one microphone or is generated through at least one of an external speaker and a speaker of the electronic device, and the second signal is the analog signal The signal may be a signal generated by shaking the diaphragm included in the MEMS 330 .

Claims (15)

1. In an electronic device,

   at least one microphone;

   a processor electrically connected to the at least one microphone and controlling an audio gain of the at least one microphone;

   the processor is configured to provide first information about a first signal to the at least one microphone;

   The at least one microphone comprises:

   generating the first signal based on the first information;

   generating a second signal based on an analog signal obtained by the at least one microphone in response to the generation of the first signal;

   provide second information about the second signal to the processor;

   The processor controls to change the audio gain of the at least one microphone based on the first information and the second information.
2. The method according to claim 1,

   and the processor sets the initial driving intensity to a first value.
3. 3. The method according to claim 2,

   the processor controls to change the driving strength of the at least one microphone based on the first information and the second information;

   The first information and the second information include at least one of an amplitude value, a frequency, and a waveform for the first signal and the second signal, respectively.
4. The method according to claim 1,

   wherein the at least one microphone includes a signal generator and generates a first signal through the signal generator.
5. The method according to claim 1,

   The changing of the audio gain compares a magnitude value included in the first information and the second information and corrects the gain by the difference when the difference in the magnitude value is equal to or greater than the first magnitude.
6. 6. The method of claim 5,

   The first signal is a pilot signal having a constant frequency among a frequency band of 7 kHz to 10 kHz or 50 kHz, the electronic device.
7. The method according to claim 1,

   and the processor changes at least one of a parameter for a driving strength and a parameter for an audio gain based on the first information and the second information.
8. The method according to claim 1,

   The analog signal is generated through a diaphragm included in the MEMS of the at least one microphone or is generated through at least one of an external speaker and a speaker of the electronic device.
9. The method according to claim 1,

   The second signal is generated by causing the analog signal to vibrate a diaphragm included in the MEMS.
10. The method according to claim 1,

    The processor may include at least one of an application processor (AP), a memory, and a codec.
11. A method of operating an electronic device, comprising:

    providing, by the processor, first information about the first signal to the at least one microphone;

    generating a first signal through the at least one microphone based on the provided first information;

    generating a second signal based on an analog signal acquired by the at least one microphone in response to the generation of the first signal;

    generating second information for the second signal and providing the second information to a processor;

    and controlling the audio gain of the at least one microphone to be changed based on the first information and the second information.
12. 12. The method of claim 11,

    The processor sets the initial driving strength to a first value, and controls the driving strength of the at least one microphone based on the first information and the second information,

    The first information and the second information include at least one of an amplitude value, a frequency, and a waveform for the first signal and the second signal, respectively.
13. 12. The method of claim 11,

    The operation of controlling to change the audio gain comprises:

    Comparing the amplitude values of the first information and the second information, if the difference between the amplitude values is equal to or greater than a first magnitude, correcting a gain by the difference.
14. 12. The method of claim 11,

    The analog signal is generated through a diaphragm included in the MEMS of the at least one microphone, or is generated through at least one of an external speaker and a speaker of an electronic device,

    The second signal is generated by causing the analog signal to vibrate a diaphragm included in the MEMS.
15. 12. The method of claim 11,

    and the processor changes at least one of a parameter for a driving strength and a parameter for an audio gain based on the first information and the second information.

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