Title :
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
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;
Conference_Titel :
Micro Electro Mechanical Systems, 2001. MEMS 2001. The 14th IEEE International Conference on
Conference_Location :
Interlaken, Switzerland
Print_ISBN :
0-7803-5998-4
DOI :
10.1109/MEMSYS.2001.906524
