Signal processing method of audio sensing device, and audio sensing system

Patent metadata

Field	Value
Publication number	US-10356509-B2
Application number	US-201715823881-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Jul 18, 2017
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A signal processing method of an audio sensing device is provided. The audio sensing device includes a plurality of resonators, at least some of the plurality of resonators having different frequency bands. The method includes setting a plurality of time frames corresponding to the plurality of resonators, and calculating a sound feature for each of the plurality of time frames, the sound feature being calculated based on an audio signal detected by each of the plurality of the resonators, wherein the plurality of time frames are set independently for each of the frequency bands, and at least some of the plurality of time frames are set to have different time intervals.

First claim

What is claimed is:

1. A signal processing method of an audio sensing device, the method comprising: for each of a plurality of resonators of the audio sensing device, setting a plurality of time frames having a time interval according to a frequency band, wherein a first frequency band of a first resonator among the plurality of resonators is different from a second frequency band of a second resonator among the plurality of resonators, and time frames set for the first resonator have a first time interval according to the first frequency band and time frames set for the second resonator have a second time interval according to the second frequency band, different from the first time interval; and calculating a sound feature for each of the plurality of time frames for each of the plurality of resonators, each sound feature being calculated based on an audio signal detected by one of the plurality of resonators.

2. The signal processing method of an audio sensing device of claim 1 , wherein the setting the plurality of time frames comprises, for each of the plurality of resonators, setting the plurality of time frames to have time intervals corresponding to a frequency band of a resonator.

3. The signal processing method of an audio sensing device of claim 2 , wherein the setting the plurality of time frames comprises setting the plurality of time frames to have time intervals gradually decreasing as frequency bands of the plurality of resonators increase.

4. The signal processing method of an audio sensing device of claim 2 , wherein the setting the plurality of time frames comprises setting the plurality of time frames to have time intervals gradually decreasing as frequency bands of the plurality of resonators decrease.

5. The signal processing method of an audio sensing device of claim 1 , wherein the setting the plurality of time frames comprises setting the plurality of time frames to have time intervals that gradually decrease as a specific frequency band of the plurality of resonators is approached.

6. The signal processing method of an audio sensing device of claim 1 , wherein the setting the plurality of time frames comprises setting the plurality of time frames for at least two of the plurality of resonators to have a same time interval.

7. The signal processing method of an audio sensing device of claim 1 , wherein at least two of the plurality of resonators have a same frequency band.

8. The signal processing method of an audio sensing device of claim 1 , wherein each of the plurality of resonators comprises:
a fixed portion, a support portion extending from the fixed portion, and a sensor portion disposed on the support portion;
wherein the method further comprises sensing the audio signal according to deformation of the support portion of each of the plurality of resonators.

9. The signal processing method of an audio sensing device of claim 8 , wherein the sensor portion comprises a piezoelectric layer.

10. The signal processing method of an audio sensing device of claim 8 , wherein each of the plurality of resonators further comprises a mass body disposed on the support portion.

11. An audio sensing system comprising: an audio sensing device including a plurality of resonators, wherein a first frequency band of a first resonator of the plurality of resonators is different from a second frequency band of a second resonator of the plurality of resonators; a controller configured to set, for each of the plurality of resonators, a plurality of time frames having a time interval according to a frequency band, wherein time frames set for at least the first resonator have a first time interval according to the first frequency band and time frames set for at least the second resonator have a second time interval according to the second frequency band, different from the first time interval; and a signal processor configured to calculate a sound feature for each of the plurality of time frames for each of the plurality of resonators, each sound feature being calculated based on an audio signal detected by one of the plurality of resonators.

12. The audio sensing system of claim 11 , wherein, for each of the plurality of resonators, the controller sets the plurality of time frames to have time intervals corresponding to a frequency band of a resonator.

13. The audio sensing system of claim 12 , wherein the controller sets the plurality of time frames for the plurality of resonators to have time intervals gradually decreasing as frequency bands of the plurality of resonators increase.

14. The audio sensing system of claim 12 , wherein the controller sets the plurality of time frames for the plurality of resonators to have time intervals gradually decreasing as frequency bands of the plurality of resonators decrease.

15. The audio sensing system of claim 11 , wherein the controller sets the plurality of time frames for at least two of the plurality of resonators to have the same time interval.

16. The audio sensing system of claim 11 , wherein each of the plurality of resonators has a different frequency band.

17. The audio sensing system of claim 11 , wherein at least two of the plurality of resonators have a same frequency band.

18. The audio sensing system of claim 11 , wherein each of the plurality of resonators comprises a fixed portion, a support portion extending from the fixed portion, and a sensor portion disposed on the support portion and configured to sense the audio signal according to deformation of the support portion.

19. The audio sensing system of claim 18 , wherein each of the plurality of resonators further comprises a mass body disposed on the support portion.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Sangha
• Kang Sungchan
• Kim Cheheung
• Yoon Yongseop
• Rhee Choongho
• Hong Hyeokki

Classifications

• H04R1/28

  Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means {(combinations of transducers with horns, i.e. front-loaded horns H04R1/30)} · CPC title

• H04R2440/03

  Resonant bending wave transducer used as a microphone · CPC title

• H04R9/18

  Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency · CPC title

• H04R1/2807

  Enclosures comprising vibrating or resonating arrangements (for the reduction of undesired resonances or vibrations H04R1/2869) · CPC title

• H04R3/005

  for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407) · CPC title