Abstract: A method for sound collection includes: converting time domain signals with a number of M collected by devices for sound collecting with a number of M into original frequency domain signals with a number of M; performing beam-forming on the M original frequency domain signals at each of preset grid points, to obtain beam-forming frequency domain signals with a number of N in one-to-one correspondence with the preset grid points; determining an average amplitude of frequency components with a number of N corresponding to each of frequency points with a number of K based on the beam-forming frequency domain signals with a number of N, and synthesizing a synthesized frequency domain signal including the frequency points and having an average amplitude as an amplitude at the each of the frequency points with a number of K; and converting the synthesized frequency domain signal into a synthesized time domain signal.

Abstract: A method for sound collection includes: converting time domain signals with a number of M collected by devices for sound collecting with a number of M into original frequency domain signals with a number of M; performing beam-forming on the M original frequency domain signals at each of preset grid points, to obtain beam-forming frequency domain signals with a number of N in one-to-one correspondence with the preset grid points; determining an average amplitude of frequency components with a number of N corresponding to each of frequency points with a number of K based on the beam-forming frequency domain signals with a number of N, and synthesizing a synthesized frequency domain signal including the frequency points and having an average amplitude as an amplitude at the each of the frequency points with a number of K; and converting the synthesized frequency domain signal into a synthesized time domain signal.

Abstract: An audio signal noise estimation method includes: for multiple preset sampling points, a noise Steered Response Power (SRP) value of a Microphone (MIC) array at each preset sampling point within a preset noise sampling period is determined to obtain a noise SRP multidimensional vector including the multiple noise SRP values corresponding to the multiple preset sampling points; a present frame SRP value for a present frame of an audio signal acquired by the MIC array at each preset sampling point is determined to obtain a present frame SRP multidimensional vector including the multiple present frame SRP values corresponding to the multiple preset sampling points; and whether the audio signal acquired by the MIC array in the present frame is a noise signal is determined according to the present frame SRP multidimensional vector and the noise SRP multidimensional vector.