Method for identifying non-stationary acoustic source characteristics by bias coherent technology

A technology for non-stationary sound sources and characteristics, applied in the field of identifying the characteristics of sound sources, and can solve problems that have not yet been discovered.
CN1472515AInactive Publication Date: 2004-02-04SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2004-02-04
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The method is as the follows. First, quantity and position of reference source are confirmed, mike array of the reference source is arranged and signal of the reference source is picked up. Then, scan measurement for mike array to holographic face is designed and the holographic face data is collected. At least, sound field of each sound source is separated by utilizing analysis technique of circular sationary partial coherence.
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Description

technical field

[0001] The invention relates to a method for identifying the characteristics of a sound source, in particular to a method for identifying the characteristics of a non-stationary sound source using the partial coherent partial sound field separation technology of a cyclostationary sound field, which belongs to the field of noise in the physics category. Background technique

[0002] Understanding the characteristics of noise sources is the premise of noise control. Therefore, in order to effectively control noise, before noise reduction measures are implemented, noise source diagnosis must be carried out first to determine the location and characteristics of major noise sources. With the development of modern signal processing technology, spectral analysis technology, coherent and partial coherent analysis technology, sound intensity analysis technology and acoustic near-field holography technology have been developed rapidly. After literature search, M.A. Tom...

Claims

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