Signal processing device having multiple acoustic-electric transducers
The present disclosure relates to a device for processing an audio signal. The device may include a first acoustic-electric transducer and a second acoustic-electric transducer. The first acoustic-electric transducer may have a first frequency response, and may be configured to detect the audio signal and generate a first sub-band signal according to the detected audio signal. The second acoustic-electric transducer may have a second frequency response, the second frequency response being different from the first frequency response. The second acoustic-electric transducer may be configured to detect the audio signal and generate a second sub-band signal according to the detected audio signal.
1. A device for processing an audio signal, comprising:
a first acoustic-electric transducer having a first frequency response and configured to:
detect the audio signal; and
generate a first sub-band signal according to the detected audio signal by the first acoustic-electric transducer; and
a second acoustic-electric transducer having a second frequency response being different from the first frequency response, wherein the second acoustic-electric transducer is configured to:
detect the audio signal; and
generate a second sub-band signal according to the detected audio signal by the second acoustic-electric transducer;
wherein each of the first acoustic-electric transducer and the second acoustic-electric transducer is a piezoelectric acoustic-electric transducers or a piezo-magnetic acoustic-electric transducer, the first acoustic-electric transducer includes a first sound sensitive component, the second acoustic-electric transducer includes a second sound sensitive component, and the first sound sensitive component and the second sound sensitive component include different mass or different elasticity coefficients, such that the first frequency response is different from the second frequency response.
2. The device of claim 1 , wherein the first frequency response and the second frequency response intersect at a point which is near a half-power point of the first frequency response and a half-power point of the second frequency response.
3. The device of claim 2 , wherein the audio signal includes a bone-conduction signal or a mechanical vibration signal.
4. The device of claim 2 , wherein the device further includes a third acoustic-electric transducer, and a third center frequency of the third acoustic-electric transducer is higher than a second center frequency of the second acoustic-electric transducer.
5. The device of claim 1 , further comprising:
a first sampling module connected to the first acoustic-electric transducer and configured to sample the first sub-band signal to generate a first sampled sub-band signal; and
a second sampling module connected to the second acoustic-electric transducer and configured to sample the second sub-band signal to generate a second sampled sub-band signal.
6. The device of claim 5 , further comprising a feedback module configured to adjust at least one of the first acoustic-electric transducer or the second acoustic-electric transducer according to at least one of the first sampled sub-band signal or the second sampled sub-band signal.
7. The device of claim 6 , further comprising a processing module configured to respectively process the first sampled sub-band signal and the second sampled sub-band signal to generate a first processed sub-band signal and a second processed sub-band signal, wherein the feedback module is configured to adjust the at least one of the first acoustic-electric transducer or the second acoustic-electric transducer according to the first processed sub-band signal or the second processed sub-band signal.
8. The device of claim 1 , wherein the first sound sensitive component includes a multi-order bandpass diaphragm.
9. The device of claim 1 , wherein the first acoustic-electric transducer further includes a first-order bandpass filter or a multi-order bandpass filter.
10. The device of claim 1 , wherein the device includes at least one of:
no more than 10 first-order acoustic-electric transducers, wherein each first-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 20 KHz;
no more than 20 second-order acoustic-electric transducers, wherein each second-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 20 kHz;
no more than 30 third-order acoustic-electric transducers, wherein each third-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 20 kHz; or
no more than 40 fourth-order acoustic-electric transducers, wherein each fourth-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 20 KHz.
11. The device of claim 1 , wherein the device includes at least one of:
no more than 8 first-order acoustic-electric transducers, wherein each first-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 8 kHz;
no more than 13 second-order acoustic-electric transducers, wherein each second-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 8 kHz;
no more than 19 third-order acoustic-electric transducers, wherein each third-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 8 kHz; or
no more than 26 fourth-order acoustic-electric transducers, wherein each fourth-order acoustic-electric transducer corresponds to a frequency band whose bandwidth is no larger than 8 kHz.
12. The device of claim 1 , wherein the first acoustic-electric transducer is a high-order wideband acoustic-electric transducer, and the second acoustic-electric transducer is a high-order narrow-band acoustic-electric transducer.
13. The device of claim 12 , wherein
the high-order wideband acoustic-electric transducer includes a plurality of underdamping sound sensitive components connected in parallel, and
the high-order narrow-band acoustic-electric transducer includes a plurality of underdamping sound sensitive components connected in series.
14. The device of claim 13 , wherein the plurality of underdamping sound sensitive components include a first underdamping sound sensitive component having a fourth frequency response, a second underdamping sound sensitive component having a fifth frequency response, and a third underdamping sound sensitive component having a sixth frequency response, wherein:
a fifth center frequency of the second underdamping sound sensitive component is higher than a fourth center frequency of the first underdamping sound sensitive, and a sixth center frequency of the third underdamping sound sensitive component is higher than the fifth center frequency of the second underdamping sound sensitive, and
the fourth frequency response and the fifth frequency response intersect at a point which is near a half-power point of the fourth frequency response and a half-power point of the fifth frequency response.
15. The device of claim 13 , wherein the plurality of underdamping sound sensitive components include a first underdamping sound sensitive component having a fourth frequency response, and a second underdamping sound sensitive component having a fifth frequency response, wherein:
the fourth frequency response and the fifth frequency response intersect at a point which is near a half-power point of the fourth frequency response and a half-power point of the fifth frequency response.
16. The device of claim 1 , wherein the first acoustic-electric transducer includes a bone-conduction acoustic-electric transducer, and the second acoustic-electric transducer includes an air-conduction acoustic-electric transducer.
17. The device of claim 16 , wherein at a same frequency band, the first sub-band signal generated by the bone-conduction acoustic-electric transducer is configured to enhance a signal-to-noise ratio (SNR) of the second sub-band signal generated by the air-conduction acoustic-electric transducer.
18. The device of claim 16 , wherein the air-conduction acoustic-electric transducer is configured to supplement a frequency band that is not covered by the first sub-band signal generated by the bone-conduction acoustic-electric transducer.
19. A method implemented on a computing device having at least one storage device storing a set of instructions for processing an audio signal, and at least one processor in communication with the at least one storage device, the method comprising:
detecting the audio signal;
generating a first sub-band signal according to the detected audio signal, via a first acoustic-electric transducer having a first frequency response, the first acoustic-electric transducer including a bone-conduction acoustic-electric transducer; and
generating a second sub-band signal according to the detected audio signal, via a second acoustic-electric transducer having a second frequency response, the second frequency response being different from the first frequency response, the second acoustic-electric transducer including an air-conduction acoustic-electric transducer;
wherein each of the first acoustic-electric transducer and the second acoustic-electric transducer is a piezoelectric acoustic-electric transducers or a piezo-magnetic acoustic-electric transducer.
20. A non-transitory computer readable medium, comprising at least one set of instructions for processing an audio signal, wherein when executed by at least one processor of an electronic terminal, the at least one set of instructions directs the at least one processor to perform acts of:
detecting the audio signal;
generating a first sub-band signal according to the detected audio signal, via a first acoustic-electric transducer having a first frequency response; and
generating a second sub-band signal according to the detected audio signal, via a second acoustic-electric transducer having a second frequency response, the second frequency response being different from the first frequency response;
wherein each of the first acoustic-electric transducer and the second acoustic-electric transducer is a piezoelectric acoustic-electric transducers or a piezo-magnetic acoustic-electric transducer, the first acoustic-electric transducer includes a first sound sensitive component, the second acoustic-electric transducer includes a second sound sensitive component, and the first sound sensitive component and the second sound sensitive component include different mass or different elasticity coefficients, such that the first frequency response is different from the second frequency response.