Sound collecting apparatus, storage medium storing program, and method

A non-transitory computer-readable storage medium storing a sound collection program for causing the processor to:

• select one or more of two or more microphones as a reference microphone;
• acquire a first acoustic signal from the reference microphone;
• perform disturbance suppression processing including cross-correlation processing between the first acoustic signal and a second acoustic signal acquired from each of the microphones;
• apply an acoustic filter to disturbance-suppressed acoustic signals from the respective microphones to impart sound pressure directivity toward a preset azimuth among a plurality of azimuths;
• add the acoustic signals to which the acoustic filter is applied;
• and
• output added acoustic signals that are obtained by the addition and are corresponding to the azimuths, respectively.

A sound collecting method comprising:

• select one or more of two or more microphones as a reference microphone;
• acquire a first acoustic signal from the reference microphone;
• perform disturbance suppression processing including cross-correlation processing between the first acoustic signal and a second acoustic signal acquired from each of the microphones;
• apply an acoustic filter to disturbance-suppressed acoustic signals from the respective microphones to impart sound pressure directivity toward a preset azimuth among a plurality of azimuths;
• add the acoustic signals to which the acoustic filter is applied;
• and
• output added acoustic signals that are obtained by the addition and are corresponding to the azimuths, respectively.