About NAKAJIMA HAJIME
About GOKA MASANORI
About TANAKA SATOSHI
About KAGAWA NAOKI
About 福山大学工学部紀要
About array
About loudspeaker
About sound field
About regulation
About frequency(Hz)
About nursing
About microphone
About speaker array
About ultrasonic speaker
About restriction
About oscillation frequency
About nurse call
About Audio equipment
About 看護
About 介護
About 支援