SOUND RECEIVING DEVICE, DIRECTIONAL CHARACTERISTIC DERIVING METHOD, DIRECTIONAL CHARACTERISTIC DERIVING APPARATUS AND COMPUTER PROGRAM

摘要

In a sound receiving device (1) provided with a housing (10) in which a plurality of sound receiving units are arranged for making it possible to receive sounds arriving from a plurality of directions, the sound receiving device is further provided with an omni-directional main sound receiving unit (11), and a sub-sound receiving unit (12) arranged at a position to receive a sound earlier by a predetermined time than the time when the main sound receiving unit (11) receives the sound. With respect to the received sounds, the sound receiving device calculates a time difference, as a delay time, between the sound receiving time of the main sound receiving unit (11) and the sound receiving time of the sub-sound receiving unit (12), and carries out the suppression of the sound received by the main sound receiving unit (11) in the case where the calculated delay time is equal to or more than a standard time and/or the enhancement of the sound received by the main sound receiving unit (11) in the case where the calculated delay time is less than the standard time.