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