CN111970606B - Loudspeaker adjusting method and electronic device using same - Google Patents
Loudspeaker adjusting method and electronic device using same Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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Abstract
The invention provides a loudspeaker adjusting method which is suitable for an electronic device comprising two microphones and two loudspeakers. The loudspeaker adjusting method comprises the following steps: acquiring two first frequency responses corresponding to the two loudspeakers by using one microphone, and acquiring two second frequency responses corresponding to the two loudspeakers by using the other microphone; calculating the sensitivity difference between the two microphones according to the two first frequency responses and the two second frequency responses, wherein the distance ratio of the two microphones to one loudspeaker is equal to the distance ratio of the two microphones to the other loudspeaker; and adjusting the output of the two speakers according to the sensitivity difference, the at least one first frequency response, and the at least one second frequency response. In addition, an electronic device using the method is also provided.
Description
Technical Field
The present invention relates to a speaker adjusting method, and more particularly, to a speaker adjusting method using a plurality of microphones to adjust a plurality of speakers and an electronic device using the same.
Background
In the conventional dual-channel mobile device, although the sound output holes of the speaker are disposed at two symmetrical ends, the frequency response (frequency response) of the left and right channel signals of the mobile device is often inconsistent due to the tolerance of ± 3dB allowed for mass production of the speaker unit and the difference in the mechanical design inside the mobile device, which causes the sound field to shift from the center of the mobile device. For example, when the frequency response of the left channel is greater than the frequency response of the right channel, the sound stage shifts to the left; conversely, when the frequency response of the right channel is greater than the frequency response of the left channel, the sound stage shifts to the right.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method for adjusting speakers and an electronic device using the same, which can adjust the outputs of two speakers through two microphones, so that the speakers can reach a target sound field during playing.
The loudspeaker adjusting method is suitable for the electronic device comprising the two microphones and the two loudspeakers. The loudspeaker adjusting method comprises the following steps: obtaining a first left frequency response corresponding to the first loudspeaker and a first right frequency response corresponding to the second loudspeaker by using the first microphone, and obtaining a second left frequency response corresponding to the first loudspeaker and a second right frequency response corresponding to the second loudspeaker by using the second microphone; calculating a sensitivity difference between the first microphone and the second microphone according to the first left frequency response, the first right frequency response, the second left frequency response and the second right frequency response, wherein the distance ratio of the first microphone to the first loudspeaker is equal to the distance ratio of the second microphone to the first loudspeaker; and adjusting the output of the first speaker and the second speaker according to the sensitivity difference, at least one of the first left frequency response and the first right frequency response, and at least one of the second left frequency response and the second right frequency response.
The electronic device comprises a first loudspeaker, a second loudspeaker, a first microphone, a second microphone and a processor. The first loudspeaker and the second loudspeaker are used for playing the frequency sweeping signal. The first microphone is used for respectively receiving a first left channel signal and a first right channel signal when the first loudspeaker and the second loudspeaker play frequency sweeping signals. The second microphone is used for respectively receiving a second left channel signal and a second right channel signal when the first loudspeaker and the second loudspeaker play the frequency sweeping signals. The ratio of the distances from the first microphone to the first loudspeaker to the second microphone is equal to the ratio of the distances from the second microphone to the second loudspeaker to the first microphone. The processor is coupled to the first speaker, the second speaker, the first microphone and the second microphone, and is configured to: obtaining a first left frequency response, a first right frequency response, a second left frequency response and a second right frequency response according to the first left channel signal, the first right channel signal, the second left channel signal and the second right channel signal respectively; calculating a sensitivity difference between the first microphone and the second microphone according to the first left frequency response, the first right frequency response, the second left frequency response, and the second right frequency response; and adjusting the output of the first speaker and the second speaker according to the sensitivity difference, at least one of the first left frequency response and the first right frequency response, and at least one of the second left frequency response and the second right frequency response.
Based on the above, the speaker adjusting method and the electronic device using the same provided by the embodiments of the present invention utilize two microphones to respectively obtain two frequency responses of two speakers, and then adjust the outputs of the two speakers according to the frequency responses. In particular, the ratio of the distance from the two microphones to one of the loudspeakers is equal to the ratio of the distance from the two microphones to the other loudspeaker, so that the difference in sensitivity between the two microphones can be calculated from the frequency responses obtained, and the frequency responses obtained can be corrected on the basis of the difference in sensitivity. The loudspeaker adjusting method does not need to consider the volume influence caused by different distances from the microphone to the loudspeakers, and can eliminate the individual difference among the microphone monomers to achieve good sound field adjustment.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1A is a schematic block diagram of an electronic device according to an embodiment of the invention;
FIG. 1B is a schematic diagram of an electronic device according to an embodiment of the invention;
fig. 2 shows a flow chart of a method of adjusting a speaker according to an embodiment of the invention;
FIG. 3 is a diagram illustrating sensitivity differences of microphones according to an embodiment of the present invention;
FIG. 4 shows a schematic diagram of the frequency response of a loudspeaker according to an embodiment of the invention;
fig. 5 shows a schematic diagram of a target frequency response of an embodiment of the present invention.
Detailed Description
The loudspeaker adjusting method of the embodiment of the invention adjusts the output of the two loudspeakers through the two microphones. In detail, there may be sensitivity (sensitivity) difference between two microphones due to mechanism tolerance, etc., but when the distance ratio between the two microphones and one loudspeaker is equal to the distance ratio between the two microphones and the other loudspeaker, the sensitivity difference between the two microphones can be calculated by the sound pickup of the two microphones corresponding to the two loudspeakers, respectively. Accordingly, with the speaker adjusting method according to the embodiment of the present invention, even if there is a sensitivity difference between the two microphones used to adjust the two speakers, a good adjustment result can be obtained.
In the following description, a speaker adjusting method will be described with an electronic apparatus provided with two speakers and two microphones, but it should be noted that the present invention is not limited thereto, and the proposed speaker adjusting method can be applied to other acoustic systems or electronic systems such as movie theaters and home theaters.
FIG. 1A is a schematic block diagram of an electronic device according to an embodiment of the invention; fig. 1B is a schematic diagram of an electronic device according to an embodiment of the invention.
Referring to fig. 1A, in the present embodiment, an electronic device 100 includes a processor 110, a first speaker 120_1, a second speaker 120_2, a first microphone 130_1, and a second microphone 130_2, wherein the first speaker 120_1, the second speaker 120_2, the first microphone 130_1, and the second microphone 130_2 are all coupled to the processor 110. It should be noted that two speakers and two microphones are used as an exemplary illustration in the present embodiment, but the number of speakers and microphones is not limited herein as long as neither the speaker nor the microphone is less than two.
The processor 110 is, for example, a Central Processing Unit (CPU), a system-on-chip (SOC), an application processor (application processor), a media processor (media processor), a microprocessor (micro processor), a digital signal processor (digital signal processor), a programmable controller, an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or the like, or any other similar device or combination thereof, and the present invention is not limited thereto.
For convenience of description, in the following description, the first speaker 120_1 and the second speaker 120_2 respectively refer to the positions of the sound outlet holes of the left channel and the right channel of the electronic device 100, and the positions of the first microphone 130_1 and the second microphone 130_2 respectively refer to the positions of the sound outlet holes of the left side and the right side of the electronic device 100.
In the present embodiment, the distance between the first speaker 120_1 and the first microphone 130_1 is, for example, a first distance d 1; the distance between the first speaker 120_1 and the second microphone 130_2 is, for example, a second distance d 2; the distance between the second speaker 120_2 and the first microphone 130_1 is, for example, a third distance d 3; the distance between the second speaker 120_2 and the second microphone 130_2 is, for example, a fourth distance d 4. In particular, when the speaker emits sound signals to the microphones at different distances, the volume effect caused by the distance difference is related to the distance ratio. Therefore, the first distance d1 and the second distance d2 are respectively designed to be the same as the fourth distance d4 and the third distance d3, so that the speakers 120_1 and 120_2 respectively have the same volume effect on the two microphones.
Referring to fig. 1B, in the present embodiment, the electronic device 100 is, for example, a clamshell electronic device, and includes an upper cover and a lower base that can be opened and closed with each other. For example, the upper cover may be used to set a display panel (not shown) of the electronic device 100, and the lower seat may be used to set a processor 110, a memory (not shown), and the like of the electronic device 100, which is not limited herein. The electronic device 100 is symmetric with respect to a reference plane, the first speaker 120_1 and the second speaker 120_2 are fixed on the lower seat of the electronic device 100 symmetrically with respect to the reference plane, and the first microphone 120_1 and the second microphone 130_2 are fixed on the upper cover of the electronic device 100 symmetrically with respect to the reference plane. However, in other embodiments, the electronic device 100 may be a non-clamshell electronic device, and the invention is not limited thereto.
In the embodiment, the first distance d1 from the first speaker 120_1 to the first microphone 130_1 is equal to the fourth distance d4 from the second speaker 120_2 to the second microphone 130_2, and the second distance d2 from the first speaker 120_1 to the second microphone 130_2 is equal to the third distance d3 from the second speaker 120_2 to the first microphone 130_1, but the invention is not limited thereto. The processor 110 is responsible for executing a speaker adjustment method to adjust the first speaker 120_1 and/or the second speaker 120_2, so that the sound field of the electronic device 100 is maintained at the middle.
Fig. 2 shows a flowchart of a speaker adjustment method according to an embodiment of the invention.
The speaker adjusting method of the present embodiment is suitable for the electronic device 100 in fig. 1A and 1B, and therefore the following description will be provided with the electronic device 100. However, it should be understood that the speaker adjusting method of the present embodiment can also be applied to other sound systems or electronic systems, and is not limited to the electronic device 100.
Referring to fig. 2, in step S210, a first left frequency response corresponding to the first speaker 120_1 and a first right frequency response corresponding to the second speaker 120_2 are obtained by the first microphone 130_1, and a second left frequency response corresponding to the first speaker 120_1 and a second right frequency response corresponding to the second speaker 120_2 are obtained by the second microphone 130_ 2. Specifically, each speaker plays a frequency sweeping signal (frequency sweeping signal), and the microphone receives an audio signal of each speaker when the frequency sweeping signal is played, so as to obtain a frequency response of each speaker. The frequency sweeping signal is, for example, a signal with a constant amplitude but a variable frequency, and those skilled in the art can understand the meaning of the frequency sweeping signal, and therefore the description thereof is omitted here.
In this embodiment, the processor 110 first plays the sweep frequency signal through the first speaker 120_ 1. The first microphone 130_1 receives the first left channel signal when the first speaker 120_1 plays the frequency sweeping signal, so that the processor 110 can obtain a first left frequency response corresponding to the first speaker 120_ 1. Then, the processor 110 plays the same sweep frequency signal through the second speaker 120_ 2. The first microphone 130_1 receives the first right channel signal when the second speaker 120_2 plays the frequency sweeping signal, so that the processor 110 can obtain a first right frequency response corresponding to the second speaker 120_2 accordingly. On the other hand, when the processor 110 plays the frequency sweep signal through the first speaker 120_1, the second microphone 130_2 receives the second left channel signal when the first speaker 120_1 plays the frequency sweep signal, so that the processor 110 can obtain a second left frequency response corresponding to the first speaker 120_1 accordingly. In addition, when the processor 110 plays the same frequency sweep signal through the second speaker 120_2, the second microphone 130_2 receives a second right channel signal when the second speaker 120_2 plays the frequency sweep signal, so that the processor 110 can obtain a second right frequency response corresponding to the second speaker 120_2 accordingly.
It should be noted that although the first distance d1 between the first microphone 130_1 and the first speaker 120_1 is the same as the fourth distance d4 between the second microphone 130_2 and the second speaker 120_2 in the present embodiment, the volume effect caused by the distance may not be considered. However, since there may be a sensitivity difference between the first microphone 130_1 and the second microphone 130_2, if the speakers are adjusted directly according to the first left frequency response corresponding to the first speaker 120_1 and the second right frequency response corresponding to the second speaker 120_2, such an adjustment would result in a misalignment due to the sensitivity difference between the first microphone 130_1 and the second microphone 130_ 2.
In step S220, a sensitivity difference between the first microphone 130_1 and the second microphone 130_2 is calculated according to the first left frequency response, the second left frequency response, the first right frequency response, and the second right frequency response. Specifically, when the distance ratio between two microphones and one of the speakers is the same as the distance ratio between two microphones and the other speaker, it means that the volume influence of each of the speakers on the two microphones is the same, and therefore, the sensitivity difference between the two microphones can be calculated by the four frequency responses obtained by the two microphones corresponding to the two speakers.
Fig. 3 is a schematic diagram illustrating sensitivity differences of microphones according to an embodiment of the present invention.
Referring to fig. 3, in the present embodiment, the first microphone 130_1 has a first sensitivity M1, the second microphone 130_2 has a second sensitivity M2, and the sensitivity difference M between the first microphone 130_1 and the second microphone 130_2 is, for example, the first sensitivity M1 minus the second sensitivity M2. Therefore, the first left frequency response and the second left frequency response corresponding to the first speaker 120_1 satisfy the following relations:
L1＝L2+M+D，
wherein L1 is the first left frequency response corresponding to the first speaker 120_1, L2 is the second left frequency response corresponding to the first speaker 120_1, and D is the volume effect caused by the ratio of the first distance D1 from the first speaker 120_1 to the first microphone 130_1 to the second distance D2 from the first speaker 120_1 to the second microphone 130_ 2.
In particular, since the ratio of the fourth distance D4 from the second speaker 120_2 to the second microphone 130_2 to the third distance D3 from the second speaker 120_2 to the first microphone 130_2 is the same as the ratio of the first distance D1 to the second distance D2, the volume effect caused by the ratio of the fourth distance D4 to the third distance D3 is also D. Accordingly, the first right frequency response and the second right frequency response corresponding to the second speaker 120_2 satisfy the following relation:
R2+M＝R1+D，
wherein, R1 is the first right frequency response corresponding to the second speaker 120_1, and R2 is the second right frequency response corresponding to the second speaker 120_ 2. The sensitivity difference M can be calculated from the two relations:
M＝0.5(L1+R1-L2-R2)。
in this way, even if the actual first sensitivity M1 of the first microphone 130_1 and the actual second sensitivity M2 of the second microphone 130_2 cannot be known, the processor 110 can calculate the sensitivity difference M between the first microphone 130_1 and the second microphone 130_2 according to the first left frequency response L1, the first right frequency response R1, the second left frequency response L2, and the second right frequency response R2.
In step S230, the outputs of the first speaker 120_1 and the second speaker 120_2 are adjusted according to the sensitivity difference between the first microphone 130_1 and the second microphone 130_2, at least one of the first left frequency response and the first right frequency response, and at least one of the second left frequency response and the second right frequency response. Specifically, after the difference in sensitivity between the two microphones is known, the difference in sensitivity can be used to correct the frequency responses acquired by the two microphones. For example, if the sensitivity of the first microphone 130_1 is higher than that of the second microphone by the sensitivity difference M, the processor 110 can decrease the magnitude (decibel) of the frequency response obtained by the first microphone 130_1 and/or increase the magnitude (decibel) of the frequency response obtained by the second microphone 130_2 according to the sensitivity difference M to exclude the influence of the volume caused by the sensitivity difference M between the first microphone 130_1 and the second microphone 130_ 2.
In order to adjust the output of both loudspeakers, it is first necessary to correct at least one frequency response for each loudspeaker. In this embodiment, since the first distance d1 is equal to the fourth distance d4 and the second distance d2 is equal to the third distance d3, the processor 110 may select the first left frequency response corresponding to the first speaker 120_1 and the second right frequency response corresponding to the second speaker 120_2 to perform a correction according to the sensitivity difference to eliminate the volume effect caused by the sensitivity difference between the first microphone 130_1 and the second microphone 130_2, or select the second left frequency response corresponding to the first speaker 120_1 and the first right frequency response corresponding to the second speaker 120_2 to perform a correction according to the sensitivity difference to eliminate the volume effect caused by the sensitivity difference between the first microphone 130_1 and the second microphone 130_ 2. In particular, under such an option, the distance between the speaker and the microphone may not be considered.
Fig. 4 shows a schematic diagram of the frequency response of a loudspeaker according to an embodiment of the invention.
Referring to fig. 4, if the processor 110 selects the first left frequency response corresponding to the first speaker 120_1 and the second right frequency response corresponding to the second speaker 120_2 to perform the correction according to the sensitivity difference, for example, a corrected first left frequency response L1 'corresponding to the first speaker 120_1 and a corrected second right frequency response R2' corresponding to the second speaker 120_2 are obtained. It has to be noted that the corrected first left frequency response L1 'is still not the same as the corrected second right frequency response R2'. Such a phenomenon may be generated due to a difference in mechanical design between the first speaker 120_1 and the second speaker 120_2 or a layout of elements of the electronic device 100. Accordingly, the processor 110 may adjust the outputs of the first speaker 120_1 and the second speaker 120_2 according to the corrected first left frequency response L1 'and the corrected second right frequency response R2', so as to adjust the sound field symmetry of the electronic device 100.
Similarly, if the processor 110 selects the second left frequency response corresponding to the first speaker 120_1 and the first right frequency response corresponding to the second speaker 120_2 to perform the correction according to the sensitivity difference, for example, a corrected second left frequency response L2 'corresponding to the first speaker 120_1 and a corrected first right frequency response R1' corresponding to the second speaker 120_2 are obtained. It has to be noted that the corrected second left frequency response L2 'is still not the same as the corrected first right frequency response R1'. Such a phenomenon may be generated due to a difference in mechanical design between the first speaker 120_1 and the second speaker 120_2 or a layout of elements of the electronic device 100. Accordingly, the processor 110 may adjust the outputs of the first speaker 120_1 and the second speaker 120_2 according to the corrected second left frequency response L2 'and the corrected first right frequency response R1', so as to adjust the sound field symmetry of the electronic device 100.
The following description will be made by the processor 110 adjusting the outputs of the first speaker 120_1 and the second speaker 120_2 according to the corrected first left frequency response L1 'and the corrected second right frequency response R2'. Other situations can be analogized, and are not described in detail in the following description.
FIG. 5 is a diagram illustrating a target frequency response according to an embodiment of the present invention.
Referring to fig. 5, fig. 5 shows the corrected first left frequency response L1 ', the corrected second right frequency response R2', and the target frequency response RT. In this embodiment, in order to balance the sound field of the electronic device 100, the processor 110 determines a target frequency response RT, for example, to adjust the outputs of the first speaker 120_1 and the second speaker 120_2 according to the determined target frequency response RT, so as to adjust the corrected first left frequency response L1 'and the corrected second right frequency response R2' toward the target frequency response RT.
The target frequency response RT may or may not be related to the frequency responses obtained in step S210, such as the first left frequency response, the first right frequency response, the second left frequency response, and the second right frequency response. In some embodiments, the target frequency response RT may be predefined by the user. In some embodiments, the target frequency response RT may be determined by the processor 110 according to the corrected first left frequency response L1 'and the corrected second right frequency response R2'. For example, the processor 110 may select one of the corrected first left frequency response L1 'and the corrected second right frequency response R2' as the target frequency response RT. For another example, the processor 110 may calculate the target frequency response RT by averaging and/or moving average according to the corrected first left frequency response L1 'and the corrected second right frequency response R2'. In other words, the present invention is not limited to the specific determination of the target frequency response RT, and those skilled in the art can implement it according to their needs.
In the present embodiment, when adjusting the outputs of the speakers, the processor 110, for example, adjusts the Equalizers (EQ) corresponding to the first speaker 120_1 and the second speaker 120_2 to adjust the corrected first left frequency response L1 'and the corrected second right frequency response R2' toward the target frequency response RT. In this way, the electronic device 100 can have a symmetric and balanced sound field when playing audio through the first speaker 120_1 and the second speaker 120_ 2.
It should be noted that the present invention is not limited to the specific adjustment items for adjusting the outputs of the plurality of speakers. In addition to the equalizer corresponding to each speaker, the output of the speaker may be adjusted by means of Fast Fourier Transform (FFT), wavelet Transform (wavelet Transform), or the like.
In summary, the speaker adjusting method and the electronic device using the same provided by the embodiments of the invention utilize two microphones to respectively obtain two frequency responses of two speakers, and then adjust the outputs of the two speakers according to the frequency responses. In particular, the ratio of the distance from the two microphones to one of the loudspeakers is equal to the ratio of the distance from the two microphones to the other loudspeaker, so that the difference in sensitivity between the two microphones can be calculated from the frequency responses obtained, and the frequency responses obtained can be corrected on the basis of the difference in sensitivity. The loudspeaker adjusting method does not need to consider the volume influence caused by different distances from the microphone to the loudspeakers, and can eliminate the individual difference among the microphone monomers to achieve good sound field adjustment.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (12)
1. A method for adjusting a speaker, which is applied to an electronic device, wherein the electronic device includes two microphones and two speakers, the method comprising:
obtaining a first left frequency response corresponding to a first loudspeaker and a first right frequency response corresponding to a second loudspeaker by using a first microphone, and obtaining a second left frequency response corresponding to the first loudspeaker and a second right frequency response corresponding to the second loudspeaker by using a second microphone;
calculating a sensitivity difference between the first microphone and the second microphone based on the first left frequency response, the first right frequency response, the second left frequency response, and the second right frequency response, wherein a distance ratio of the first microphone to the second microphone to the first speaker is equal to a distance ratio of the second microphone to the first microphone to the second speaker; and
adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response and the second right frequency response, or according to the sensitivity difference, the second left frequency response and the first right frequency response.
2. The speaker adjustment method according to claim 1, wherein the first microphone and the second microphone are symmetrically disposed with respect to a reference plane of the electronic device, and the first speaker and the second speaker are symmetrically disposed with respect to the reference plane of the electronic device.
3. The speaker adjustment method according to claim 2, wherein a distance of the first microphone from the first speaker is equal to a distance of the second microphone from the second speaker, and a distance of the first microphone from the second speaker is equal to a distance of the second microphone from the first speaker.
4. The speaker adjustment method of claim 1, wherein adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response comprises:
correcting the first left frequency response and the second right frequency response, or correcting the first right frequency response and the second left frequency response, according to the sensitivity difference; and
adjusting the outputs of the first and second speakers to adjust the corrected first left frequency response and the corrected second right frequency response, or the corrected first right frequency response and the corrected second left frequency response, toward a target frequency response.
5. The speaker adjustment method of claim 1, wherein adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response comprises:
determining a target frequency response according to the first left frequency response and the second right frequency response, or according to the second left frequency response and the first right frequency response; and
adjusting the output of the first speaker and the second speaker according to the target frequency response, the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the target frequency response, the sensitivity difference, the second left frequency response, and the first right frequency response.
6. The speaker adjustment method of claim 1, wherein adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response comprises:
adjusting an equalizer of the first speaker and the second speaker.
7. An electronic device, comprising:
the first loudspeaker is used for playing a scanning signal;
the second loudspeaker is used for playing the frequency sweeping signal;
the first microphone is used for respectively receiving a first left channel signal and a first right channel signal when the first loudspeaker and the second loudspeaker play the frequency sweeping signals;
a second microphone, configured to receive a second left channel signal and a second right channel signal when the first speaker and the second speaker play the frequency sweep signal, respectively, where a distance ratio between the first microphone and the first speaker and the second microphone is equal to a distance ratio between the second microphone and the first speaker and the second speaker; and
a processor coupled to the first speaker, the second speaker, the first microphone, and the second microphone to:
obtaining a first left frequency response, a first right frequency response, a second left frequency response and a second right frequency response according to the first left channel signal, the first right channel signal, the second left channel signal and the second right channel signal respectively;
calculating a sensitivity difference between the first microphone and the second microphone based on the first left frequency response, the first right frequency response, the second left frequency response, and the second right frequency response; and
adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response and the second right frequency response, or according to the sensitivity difference, the second left frequency response and the first right frequency response.
8. The electronic device of claim 7, wherein the first and second microphones are symmetrically disposed relative to a reference plane of the electronic device, and the first and second speakers are symmetrically disposed relative to the reference plane of the electronic device.
9. The electronic device of claim 8, wherein a distance of the first microphone to the first speaker is equal to a distance of the second microphone to the second speaker, and a distance of the first microphone to the second speaker is equal to a distance of the second microphone to the first speaker.
10. The electronic device of claim 7, wherein in adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response, the processor is to:
correcting the first left frequency response and the second right frequency response, or correcting the first right frequency response and the second left frequency response, according to the sensitivity difference; and
adjusting the outputs of the first and second speakers to adjust the corrected first left frequency response and the corrected second right frequency response, or the corrected first right frequency response and the corrected second left frequency response, toward a target frequency response.
11. The electronic device of claim 7, wherein in adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response, the processor is to:
determining a target frequency response according to the first left frequency response and the second right frequency response, or according to the second left frequency response and the first right frequency response; and
adjusting the output of the first speaker and the second speaker according to the target frequency response, the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the target frequency response, the sensitivity difference, the second left frequency response, and the first right frequency response.
12. The electronic device of claim 7, wherein in adjusting the output of the first speaker and the second speaker according to the sensitivity difference, the first left frequency response, and the second right frequency response, or according to the sensitivity difference, the second left frequency response, and the first right frequency response, the processor is to:
adjusting an equalizer of the first speaker and the second speaker.
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| CN114007165B (en) * | 2021-10-29 | 2022-06-28 | 歌尔光学科技有限公司 | Electronic equipment and far field noise elimination self-calibration method and system thereof |
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| JP2006311107A (en) * | 2005-04-27 | 2006-11-09 | Sony Corp | System and method for measuring speaker characteristic |
| CN105430546A (en) * | 2014-09-17 | 2016-03-23 | 哈博拉有限公司 | Earset and control method for the same |
| CN108737948A (en) * | 2017-04-13 | 2018-11-02 | 雅马哈株式会社 | Loudspeaker position detecting system, device and method |
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| US7720232B2 (en) * | 2004-10-15 | 2010-05-18 | Lifesize Communications, Inc. | Speakerphone |
| DE102009029367B4 (en) * | 2009-09-11 | 2012-01-12 | Dietmar Ruwisch | Method and device for analyzing and adjusting the acoustic properties of a hands-free car kit |
| DE112014005295T5 (en) * | 2013-11-20 | 2016-10-20 | Knowles Ipc (M) Sdn. Bhd. | Device with a loudspeaker, which is used as a second microphone |
| US9729984B2 (en) * | 2014-01-18 | 2017-08-08 | Microsoft Technology Licensing, Llc | Dynamic calibration of an audio system |
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| JP2006311107A (en) * | 2005-04-27 | 2006-11-09 | Sony Corp | System and method for measuring speaker characteristic |
| CN105430546A (en) * | 2014-09-17 | 2016-03-23 | 哈博拉有限公司 | Earset and control method for the same |
| CN108737948A (en) * | 2017-04-13 | 2018-11-02 | 雅马哈株式会社 | Loudspeaker position detecting system, device and method |
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