MULTI-CHANNEL ACOUSTIC COUPLING EVALUATION METHOD, DEVICE, AND MULTI-CHANNEL ACOUSTIC COUPLING EVALUATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a multi-channel acoustic coupling evaluation method for which telephone conversation voice can be used as it is, with less deterioration of precision and capable of evaluating size of acoustic coupling. SOLUTION: The multi-channel acoustic coupling evaluation method evaluates the size (acoustic coupling amount) of the acoustic coupling of a multi-channel acoustic system having a group of speakers and a group of microphones constituted of speakers of a plurality of channels (one or more channels) and microphones of one or more channels (a plurality of channels) in the same acoustic space. In the acoustic coupling evaluation method, the acoustic coupling amount is provided so that it becomes larger than a value of power summation ratio which is ratio between summation of power by every channel of microphone output signals to be evaluation targets and summation of power by every channel of speaker input signals to be evaluation targets according as deviation of the speaker input signals of the respective channels is large and the acoustic coupling amount is provided so that it approaches to a value of the power summation ratio according as the deviation of the speaker input signals of the respective channels is small by every frequency band. COPYRIGHT: (C)2005,JPO&NCIPI