Acoustic impedance control through structural tuning by pneumatic balloon actuators

Author

Yoda, M. ; Konishi, S.

Author_Institution

Dept. of Mech. Eng., Ritsumeikan Univ., Kyoto, Japan

fYear

2001

fDate

25-25 Jan. 2001

Firstpage

244

Lastpage

247

Abstract

We report on acoustic impedance control of the acoustic resonator using pneumatic balloon actuators. The fabricated pneumatic balloon actuators at acoustic holes could tune the acoustic resistance and the inertance of the resonator through structural parameter control. This paper focuses on the tuning of the acoustic resistance and the inertance when the acoustic capacitance is fixed. We tried to control not only the resonant frequency but also the total acoustic impedance and the phase. In the analytical and experimental results, a slight deformation of actuators could provide a large change of the acoustic impedance in the resonator.

Keywords

acoustic impedance; acoustic resonators; acoustic variables control; balloons; microactuators; pneumatic control equipment; tuning; acoustic capacitance; acoustic impedance control; acoustic resistance; acoustic resonator; deformation; functional acoustic boundary; inertance; pneumatic balloon actuator; resonant frequency; structural tuning; Acoustic devices; Acoustic noise; Adaptive control; Capacitance; Impedance; Pneumatic actuators; Programmable control; Resonant frequency; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro Electro Mechanical Systems, 2001. MEMS 2001. The 14th IEEE International Conference on

Conference_Location

Interlaken, Switzerland

ISSN

1084-6999

Print_ISBN

0-7803-5998-4

Type

conf

DOI

10.1109/MEMSYS.2001.906524

Filename

906524