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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
Author(s)
Jang, JongmoonLee, JangWooWoo, SeongyongSly, David J.Campbell, Luke J.Cho, Jin-HoO'Leary, Stephen J.Park, Min-HyunHan, SungminChoi, Ji-WongJang, Jeong HunChoi, Hongsoo
Issued Date
2015-07
Citation
Scientific Reports, v.5
Type
Article
Keywords
Acoustic SensorAUDITORY-NERVEBEAM ARRAYSCochlear ImplantDIAPHRAGMFREQUENCY-SELECTIVITYINNER-EARPHYSICAL MODELSPIRAL GANGLION-CELLSSTIMULATION
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
  • 최지웅 Choi, Ji-Woong
  • Research Interests Communication System; Signal Processing; Communication Circuit Design; 생체 신호 통신 및 신호 처리; 뇌-기계 인터페이스(BMI); 차세대 교차계층 통신 및 신호 처리; 5G 모바일 통신
Files in This Item:
10.1038_srep12447.pdf

10.1038_srep12447.pdf

기타 데이터 / 1.58 MB / Adobe PDF download
Appears in Collections:
Department of Robotics and Mechatronics Engineering Bio-Micro Robotics Lab 1. Journal Articles
Department of Electrical Engineering and Computer Science CSP(Communication and Signal Processing) Lab 1. Journal Articles

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