| BIOLOGICAL SCIENCE AND ENGINEERING |
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Estimation for the location of multiple moving sound sources in small-distance dual-microphone |
| GONG Qin1,2, LIU Yi1 |
1. Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China;
2. Research Center of Biomedical Engineering, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China |
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Abstract Angle measurements using traditional auditory analyse with dual-microphones have limited accuracy when the two microphones are close together and the sound sources are moving. This paper presents a method for multiple moving sound source localization with two closely spaced microphones. The method uses an improved gammatone filter bank for the time-frequency analysis of the mixed sound samples, extracts the zero-crossing time difference (ZCTD) that reflects the sound source location feature information and finally statistically analyzes the ZCTD with a Gaussian function to localize the sound source. Tests show that this method gives accurate angle estimates for various kinds of sound sources with various moving speeds along various trajection.
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| Keywords
signal acoustics
dual-microphone
moving sound source
gammatone filter bank
zero-crossing time difference
Gauss's function
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Issue Date: 15 August 2016
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2016,
Vol. 56
