Journal
TRENDS IN HEARING
Volume 22, Issue -, Pages -Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/2331216518774450
Keywords
cochlear implant; microphone; piezoelectric; PVDF
Funding
- Advanced Bionics, Columbia University RISE (Research Initiative for Scientific Enhancement) Grant
- KAIST End Run Project Grant
- Institute for Information & Communications Technology Promotion (IITP) grant - Korea government (MSIT) [2017-0-00052]
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [R01DC013303] Funding Source: NIH RePORTER
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We report the fabrication and characterization of a prototype polyvinylidene fluoride polymer-based implantable microphone for detecting sound inside gerbil and human cochleae. With the current configuration and amplification, the signal-to-noise ratios were sufficiently high for normally occurring sound pressures and frequencies (ear canal pressures > 50-60 dB SPL and 0.1-10 kHz), though 10 to 20 dB poorer than for some hearing aid microphones. These results demonstrate the feasibility of the prototype devices as implantable microphones for the development of totally implantable cochlear implants. For patients, this will improve sound reception by utilizing the outer ear and will improve the use of cochlear implants.
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