REFLECTION SOUND INFORMATION ESTIMATION EQUIPMENT, REFLECTION SOUND INFORMATION ESTIMATION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a technology which estimates a relative difference in the arrival time between a standard reflection sound and other reflection sounds.

SOLUTION: When Q is an preset integer no less than 2, a complex amplitude (arrival amplitude) of each of Q reflection sounds (the reflection sound is shown by a function (transfer characteristic function) simulating a transfer characteristic between an optional position in space and multiple microphones for every frequency included in a prescribed frequency bandwidth multiplied by the complex amplitude) is used. Concerning each reflection sound (target reflection sound) other than a standard reflection sound, the arithmetic average of the frequency in relation to a deflection angle of the arrival amplitude of the target reflection sound in relation to the arrival amplitude of the standard reflection sound being divided by the frequency is defined as a relative difference in the arrival time between the standard reflection sound and the target reflection sound.

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