Bioinspired Soft Elastic Metamaterials for Reconstruction of Natural Hearing

Author:

Tang Hanchuan1ORCID,Zhang Shujie2,Tian Ye1,Kang Tianyu1,Zhou Cheng1,Yang Shuaikang1,Liu Ying1,Liu Xurui1,Chen Qicai3,Xiao Hongjun4,Chen Wei2,Zang Jianfeng15ORCID

Affiliation:

1. School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

2. College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

3. School of Life Sciences Central China Normal University Wuhan 430074 China

4. Department of Otorhinolaryngology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China

5. The State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 China

Abstract

AbstractNatural hearing which means hearing naturally like normal people is critical for patients with hearing loss to participate in life. Cochlear implants have enabled numerous severe hearing loss patients to hear voice functionally, while cochlear implant users can hardly distinguish different tones or appreciate music subject to the absence of rate coding and insufficient frequency channels. Here a bioinspired soft elastic metamaterial that reproduces the shape and key functions of the human cochlea is reported. Inspired by human cochlea, the metamaterials are designed to possess graded microstructures with high effective refractive index distributed on a spiral shape to implement position‐related frequency demultiplexing, passive sound enhancements of 10 times, and high‐speed parallel processing of 168‐channel sound/piezoelectric signals. Besides, it is demonstrated that natural hearing artificial cochlea has fine frequency resolution up to 30 Hz, a wide audible range from 150–12 000 Hz, and a considerable output voltage that can activate the auditory pathway in mice. This work blazes a promising trail for reconstruction of natural hearing in patients with severe hearing loss.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Publisher

Wiley

Subject

General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)

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