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A microelectromechanical system artificial basilar membrane based on a piezoelectric cantilever array and its characterization using an animal model
- A microelectromechanical system artificial basilar membrane based on a piezoelectric cantilever array and its characterization using an animal model
- Jang, Jongmoon; Lee, JangWoo; Woo, Seongyong; Sly, David J.; Campbell, Luke J.; Cho, Jin-Ho; O'Leary, Stephen J.; Park, Min-Hyun; Han, Sungmin; Choi, Ji-Wong; Jang, Jeong Hun; Choi, Hongsoo
- DGIST Authors
- Jang, Jongmoon; Woo, Seongyong; Han, Sungmin; Choi, Ji-Wong; Choi, Hongsoo
- Issue Date
- Scientific Reports, 5
- Article Type
- 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.
- NATURE PUBLISHING GROUP
- Related Researcher
Choi, Hong Soo
Bio-Micro Robotics Lab
Micro/Nano robot; Neural prostheses; MEMS; BMI; MEMS/NEMS; BioMEMS; MEMS 초음파 트랜스듀스; 인공와우
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- Department of Information and Communication EngineeringCSP(Communication and Signal Processing) Lab1. Journal Articles
Department of Robotics EngineeringBio-Micro Robotics Lab1. Journal Articles
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