About KOIZUMI N
About NTT Human Interface Lab., Tokyo, JPN
About MAKINO S
About NTT Human Interface Lab., Tokyo, JPN
About OIKAWA H
About NTT Customer Equipment Division, Tokyo, JPN
About Journal of the Acoustical Society of Japan. E
About microphone
About echo suppression
About Applications of television
About 反響
About 音響
About エコーキャンセラ