PHASE DIFFERENCE CALCULATION DEVICE, SOUND SOURCE DIRECTION DETECTION DEVICE, AND PHASE DIFFERENCE CALCULATION METHOD

摘要

PROBLEM TO BE SOLVED: To more accurately calculate a phase difference between sound signals output from different microphones.SOLUTION: A sound source signal evaluation unit (5) of a sound source direction detection device (1) creates phase shift sound signals in which the relative shift amounts of sound signals output from a first microphone (2a) and a second microphone (2b) are varied stepwise, and calculates a phase difference between the two sound signals on the basis of an integrated value of differences in the output values within a certain range of two sound signals in each phase shift sound signal.SELECTED DRAWING: Figure 1