Cited 6 time in webofscience Cited 9 time in scopus

A microelectromechanical system artificial basilar membrane based on a piezoelectric cantilever array and its characterization using an animal model

Title
A microelectromechanical system artificial basilar membrane based on a piezoelectric cantilever array and its characterization using an animal model
Authors
Jang, J[Jang, Jongmoon]Lee, J[Lee, JangWoo]Woo, S[Woo, Seongyong]Sly, DJ[Sly, David J.]Campbell, LJ[Campbell, Luke J.]Cho, JH[Cho, Jin-Ho]O'Leary, SJ[O'Leary, Stephen J.]Park, MH[Park, Min-Hyun]Han, S[Han, Sungmin]Choi, JW[Choi, Ji-Wong]Jang, JH[Jang, Jeong Hun]Choi, H[Choi, Hongsoo]
DGIST Authors
Jang, J[Jang, Jongmoon]; Woo, S[Woo, Seongyong]; Han, S[Han, Sungmin]; Choi, JW[Choi, Ji-Wong]Choi, H[Choi, Hongsoo]
Issue Date
2015-07-31
Citation
Scientific Reports, 5
Type
Article
Article Type
Article
ISSN
2045-2322
Abstract
We proposed a piezoelectric artificial basilar membrane (ABM) composed of a microelectromechanical system cantilever array. The ABM mimics the tonotopy of the cochlea: frequency selectivity and mechanoelectric transduction. The fabricated ABM exhibits a clear tonotopy in an audible frequency range (2.92-12.6 €‰kHz). Also, an animal model was used to verify the characteristics of the ABM as a front end for potential cochlear implant applications. For this, a signal processor was used to convert the piezoelectric output from the ABM to an electrical stimulus for auditory neurons. The electrical stimulus for auditory neurons was delivered through an implanted intra-cochlear electrode array. The amplitude of the electrical stimulus was modulated in the range of 0.15 to 3.5 €‰V with incoming sound pressure levels (SPL) of 70.1 to 94.8 €‰dB SPL. The electrical stimulus was used to elicit an electrically evoked auditory brainstem response (EABR) from deafened Guinea pigs. EABRs were successfully measured and their magnitude increased upon application of acoustic stimuli from 75 to 95 €‰dB SPL. The frequency selectivity of the ABM was estimated by measuring the magnitude of EABRs while applying sound pressure at the resonance and off-resonance frequencies of the corresponding cantilever of the selected channel. In this study, we demonstrated a novel piezoelectric ABM and verified its characteristics by measuring EABRs.
URI
http://hdl.handle.net/20.500.11750/1569
DOI
10.1038/srep12447
Publisher
NATURE PUBLISHING GROUP
Related Researcher
  • Author Choi, Hong Soo Bio-Micro Robotics Lab
  • Research Interests Micro/Nano robot; Neural prostheses; MEMS; BMI; MEMS/NEMS; BioMEMS; MEMS 초음파 트랜스듀스; 인공와우
Files:
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Collection:
Information and Communication EngineeringCSP(Communication and Signal Processing) Lab1. Journal Articles
Information and Communication EngineeringETC1. Journal Articles
Information and Communication EngineeringETC1. Journal Articles


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