| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound source direction estimation device, etc. including flat plate type sound sampling means for accurately estimating a sound source direction.SOLUTION: A sound source direction estimation device includes: a flat plate 131; microphones M1-M4 that are arranged on the flat plate, sample only the sound pressure signals of sound to be propagated from a front side being one side of a plane including the flat plate, are not mutually arranged on one straight line, and constitute two microphone pairs (M1, M3) and (M2, M4); a windbreak screen 136 arranged on the front side of the microphones M1-M4; and sound source direction estimation means for estimating a sound source direction on the basis of an arrival time difference between sound pressure signals to be input to the microphones M1, M3 constituting the microphone pair (M1, M3), an arrival time difference between sound pressure signals to be input to the microphones M2, M4 constituting the microphone pair (M2, M4), the position coordinates of the microphones M1-M4, and a sound speed.SELECTED DRAWING: Figure 2 |
