Method for rebuilding circulated steady sound source by boundary element method
A boundary element method and sound source technology, applied in the field of signal reconstruction, can solve problems such as inability to apply, difficulty in analyzing sound field characteristics, and difficulty in data acquisition.
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[0060] The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following embodiments:
[0061] 1. A loudspeaker is used to emit sound to form a cyclostationary sound source, and a microphone is arranged near the loudspeaker for extracting reference signals. The excitation source of the loudspeaker is:
[0062] V=Acos(2πf 1 t)*noise(t),
[0063] Where: A=1, f 1 =300, noise is band-pass colored noise.
[0064] 2. First arrange 20 microphones into a linear microphone array, scan and collect the sound pressure of the holographic measurement points in turn on the holographic measurement surface, and finally form a 20×20 holographic measurement surface array; at the same time, use the reference source microphone to collect re...
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