Acoustic signal processing device, acoustic signal processing method, and program for determining a steering coefficient which depends on angle between sound source and microphone
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United States of America Patent
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Feb 28, 2023
Grant Date -
Sep 17, 2020
app pub date -
Mar 5, 2020
filing date -
Mar 15, 2019
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Abstract
An acoustic signal processing device calculates a signal waveform that a microphone receives when at least one of a sound source and the microphone is moving. The acoustic signal processing device includes a coefficient calculation unit configured to model a steering coefficient gk,m representing how much an amplitude of a sound source signal emitted at an mth discrete time, where m is an integer between 1 and M and M is a length of the sound source signal, is transferred to an amplitude of a signal that the microphone receives at a kth discrete time, where k is an integer between 1 and K and K is a length of a recording signal, using N-order Fourier series expansion where N is an integer of 1 or more, and a recording signal calculation unit configured to calculate the signal waveform that the microphone receives using the modeled steering coefficient gk,m.
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