| 摘要 |
<P>PROBLEM TO BE SOLVED: To measure characteristics of two speakers respectively even when the same sound is outputted from the speakers at the same time. <P>SOLUTION: A first microphone 31 is arranged in front of a speaker 21L for left channel, a second microphone 32 is arranged in front of a speaker 21R for right channel, and a third and a fourth microphones 33 and 34 are arranged between the first and the second microphones. Output ratios of the respective microphones when signals are outputted from the speakers for left and right channels individually and the output phase difference when the respective output ratios are measured are stored, and outputs of the respective microphones to sounds outputted from both the speakers at the same time are arithmetically processed as prescribed by using the stored output ratios and output phase difference as constants to obtain characteristics of both the speakers. <P>COPYRIGHT: (C)2007,JPO&INPIT |
