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Fabrication of High Acoustic-Electric Efficient Piezoelectric Ceramic Bimorph Element and Pickup in Middle Ear of Cat

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Author(s): KANG Hou-Yong, WU Yong-Zhen, CHI Fang-Lu, GUO Shao-Bo, GAO Na, PAN Tie-Zheng

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 25;
Issue: 7;
Start page: 691;
Date: 2010;
Original page

Keywords: piezoelectric ceramic bimorph elements | transverse piezoelectric coefficient | acoustic-electric performance | middle ear

ABSTRACT
A novel PZT piezoelectric ceramics with high d31 (-480pC/N) and Tc (280℃) was developed to shape a long strip of piezoelectric ceramic bimorph element (PCBE), with 0.3 mm in thickness, 1.0 mm in width and three lengths (3.5, 4.0, 4.5 mm), which were assembled to the cantilever structure anchoring a Preamplifier, and were implanted totally into tympanic cavity of cat ear to analyze their ability of picking up acoustic signal. This study explores that the PCBEs have high efficient acoustic-electric performance. They can pick up 20-20000Hz acoustic signal with an approximate flat frequency curve when they are implanted the tympanic cavity of cat. The maximal output of -13.16 dB Volt p-p value (@1.5kHz, 0dB input) is picked up by the 4.5mm PCBE. This validates that PCBE might be totally implanted into tympanic cavity of cat ear as a piezoelectric microphone.

Tango Jona
Tangokurs Rapperswil-Jona

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