Feasible pickup from intact ossicular chain with floating piezoelectric microphone.

Biomedical Engineering Online
Hou-Yong KangZhen Gao

Abstract

Many microphones have been developed to meet with the implantable requirement of totally implantable cochlear implant (TICI). However, a biocompatible one without destroying the intactness of the ossicular chain still remains under investigation. Such an implantable floating piezoelectric microphone (FPM) has been manufactured and shows an efficient electroacoustic performance in vitro test at our lab. We examined whether it pick up sensitively from the intact ossicular chain and postulated whether it be an optimal implantable one. Animal controlled experiment: five adult cats (eight ears) were sacrificed as the model to test the electroacoustic performance of the FPM. Three groups were studied: (1) the experiment group (on malleus): the FPM glued onto the handle of the malleus of the intact ossicular chains; (2) negative control group (in vivo): the FPM only hung into the tympanic cavity; (3) positive control group (Hy-M30): a HiFi commercial microphone placed close to the site of the experiment ear. The testing speaker played pure tones orderly ranged from 0.25 to 8.0 kHz. The FPM inside the ear and the HiFi microphone simultaneously picked up acoustic vibration which recorded as .wav files to analyze. The FPM transformed aco...Continue Reading

References

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Citations

Feb 13, 2018·Biomedical Engineering Online·Diego CaleroJúlio A Cordioli
Sep 12, 2017·Cochlear Implants International·Alistair Mitchell-InnesPhilip Begg

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Methods Mentioned

BETA
cochlear implant
chip
dissection

Software Mentioned

Cool edit Pro
Cool Edit
Sigmastat

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