期刊
NEW JOURNAL OF PHYSICS
卷 21, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab3d8f
关键词
acoustics; inner ear; hearing; metamaterial
资金
- LABEX WIFI (Laboratory of Excellence within the French Program 'Investments for the Future') [ANR-10-LABX-24, ANR-10-IDEX-0001-02 PSL*]
- Agence Nationale de la Recherche [ANR-13-JS09-0001-01]
The human ear is a fascinating sensor, capable of detecting pressures over ten octaves of frequency and twelve orders of magnitudes. Here, following a biophysical model, we demonstrate experimentally that the physics of a living cochlea can be emulated by an active one-dimensional acoustic metamaterial. The latter solely consists on a set of subwavelength active acoustic resonators, coupled to a main propagating waveguide. By introducing a gradient in the resonators' properties, we establish an experimental set-up which mimics the dynamical responses of both the dead and the living cochleae: the cochlear tonotopy as well as the low-amplitude sound amplifier are reproduced.
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