オオイシ　クニオ   大石　邦夫    所属   コンピュータサイエンス学部 コンピュータサイエンス学科    職種   教授
言語種別	英語
発行・発表の年月	2013/10
形態種別	国際会議論文
査読	査読あり
標題	New direct-radiator loudspeaker driven by piezoelectric ultrasonic motors
執筆形態	共著
掲載誌名	The 2nd IEEE Global Conference on Consumer Electronics
巻・号・頁	SS-8,pp.200-203
著者・共著者	Hiroya Saito, Kunio Oishi, Juro Ohga, Hirokazu Negishi, Ikuo Oohira, and Kazuaki Maeda
概要	Completely new direct-radiator loudspeaker constructions as alternative of the conventional electrodynamic loudspeakers by using piezoelectric ultrasonic motors are introduced. The authors examined two sorts of constructions. One is actuated by continuous revolution of piezoelectric ultrasonic motors. The other is driven by linear ultrasonic actuators. They are useful for radiation of rather low frequency signal because it shows almost flat phase frequency characteristics in low frequency region.