The speakers speech signal emphasizing part 26 conducts synchronous addition processing of a speakers speech signal among {HEAD ~ the input speech signals} inputted through {TAIL ~ the microphones} 20′a and 20′b, and emphasizes the speakers speech signal 
The speakers speech signal emphasizing part 26 conducts synchronous addition processing of a speakers speech signal among { HEAD ~ the input speech signals } inputted through { TAIL ~ the microphones } 20′a and 20′b , and emphasizes the speakers speech signal
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