Patent ID: 8891780

Claim:
A microphone array device comprising: a first sound reception circuit component configured to obtain a first sound signal that is input from a first microphone; a second sound reception circuit component configured to obtain a second sound signal that is input from a second microphone different from the first microphone; a first signal converter configured to generate first spectra obtained by converting the first sound signal into a frequency component; a second signal converter configured to generate second spectra obtained by converting the second sound signal into the frequency component; a phase spectrum difference calculation circuit component configured to calculate a phase spectrum difference between the first spectra and the second spectra for each frequency based on the first spectra and the second spectra; a noise state evaluation circuit component configured to obtain an evaluation parameter to evaluate an influence of a non-target sound on a target sound based on a spectrum which direction indicated by the phase spectrum difference for the each frequency is included in from a first direction to a second direction among the first spectra; and a suppression circuit component configured to suppress the non-target sound included in the first spectra based on the evaluation parameter.