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

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.