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Title:
SOUND SOURCE POSITIONING METHOD UNDER STRONG MULTIPATH INTERFERENCE CONDITION
Document Type and Number:
WIPO Patent Application WO/2023/173514
Kind Code:
A1
Abstract:
A sound source positioning method under a strong multipath interference condition, comprising the following steps: constructing a microphone array (S1); collecting a sound source signal by means of the microphone array, thereby determining a characteristic frequency (ω p) of the sound source signal and the sound propagation direction; calculating a signal gain ratio; selecting a reconstruction scheme of the microphone array according to the signal gain ratio, and changing the characteristic frequency (ω p) according to the reconstruction scheme; using the characteristic frequency (ω p) detected by the microphone array to predict the sound source direction, generating a reconstruction scheme according to the signal gain ratio in the predicted direction, reconstructing the microphone array according to the reconstruction scheme, repeating the aforementioned process to gradually reduce the influence of multipath effects on the characteristic frequency (ω p) value detected by the microphone array while mitigating the influence on the judgment of the sound source direction, and when a change of the characteristic frequency (ω p) before and after reconstruction is smaller than a threshold value, using a predicted direction obtained according to the characteristic frequency (ω p) as a sound source direction.

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Inventors:
YU LIBIN (CN)
WANG ZHI (CN)
LIN JUNGUANG (CN)
XI YUZHANG (CN)
SUN SHIEN (CN)
DONG YIHUA (CN)
MA CONG (CN)
Application Number:
PCT/CN2022/085493
Publication Date:
September 21, 2023
Filing Date:
April 07, 2022
Export Citation:
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Assignee:
ZHEJIANG ENERGY R & D INST CO LTD (CN)
International Classes:
G01S5/20; G01M3/24
Foreign References:
CN105068048A2015-11-18
CN110111807A2019-08-09
CN113238189A2021-08-10
CN113721194A2021-11-30
CN109709520A2019-05-03
US20190028803A12019-01-24
US20140192999A12014-07-10
Attorney, Agent or Firm:
ZHEJIANG KG IP LAW FIRM (CN)
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