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.
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[0015] The following examples are provided in conjunction with the method content of the present invention:
[0016] 1. Assuming that the number and location of sound sources are known, two speakers are used to generate sound to form two cyclostationary sound sources, and two microphones are arranged to extract reference source signals.
[0017] The excitation source for the loudspeaker is:
[0018] Vsource1=Acos(2πf 1 t)*noise(t)
[0019] Vsource2=B(1+Ccos(2πf b t))*cos(2πf a t)
[0020] Among them, A=10, B=C=1, f1=600, f a =600,f b =200, noise is bandpass white noise.
[0021] 2. Arrange 14 microphones in a linear array, scan and measure the entire holographic surface to form a 14×14 holographic surface array; while collecting data on the holographic surface, use two reference source microphones to collect reference source sound signals. During measurement, the acoustic signals of all microphone channels are collected synchronously, and the records are stored in a co...
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