Title :
New direct-radiator loudspeaker driven by piezoelectric ultrasonic motors
Author :
Saito, Hiroshi ; Oishi, Kazuaki ; Negishi, Hirokazu ; Ohga, Juro ; Oohira, Ikuo ; Maeda, Kumiko
Author_Institution :
Tokyo Univ. of Technol., Tokyo, Japan
Abstract :
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.
Keywords :
loudspeakers; ultrasonic motors; direct-radiator loudspeaker driven; electrodynamic loudspeakers; linear ultrasonic actuators; low frequency signal; piezoelectric ultrasonic motors; Acoustics; Actuators; Frequency measurement; Integrated circuit modeling; Loudspeakers; Permanent magnet motors; Stators; cone radiator; linear actuator; revolution; woofer;
Conference_Titel :
Consumer Electronics (GCCE), 2013 IEEE 2nd Global Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4799-0890-5
DOI :
10.1109/GCCE.2013.6664798
