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Low-frequency Reinforced Ferroelectric Acoustic Actuators
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- Authors
- H. J. KIM, W. S. YANG, K. S. No
- Issue Date
- 2011-07
- Citation
- International Symposium on Applications of Ferroelectrics (ISAF) / International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (PFM) 2011, pp.1-4
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper reports the low-frequency reinforced ferroelectric acoustic actuators with high performances. In order to achieve a higher output sound pressure level and wider frequency response range, we have proposed the novel rubber/resin bi-layer acoustic diaphragm. From the simulated and measured frequency response results, the ferroelectric acoustic actuators with a rubber/resin bi-layer diaphragm have a first resonant frequency of 630 Hz and an average output sound pressure level of 85 dB@10cm. These results indicate that the design optimization of acoustic diaphragms can enhance the sound pressure at a low frequency range. Compared to a commercial piezoelectric ceramic speaker with a resin single layer diaphragm, the acoustic actuators fabricated with a rubber/resin bi-layer diaphragm have at least 10 dB higher sound pressure at a low frequency range of less than 1 kHz. © 2011 IEEE.
- KSP Keywords
- Bi-layer, Design and optimization, Measured frequency, Resonant Frequency, Single-layer, Sound pressure level, frequency response range, low frequency range, piezoelectric ceramics