Mimicking the active cochlea with a fluid-coupled array of subwavelength Hopf resonators
arXiv:1904.01477 · doi:10.1098/rspa.2019.0870
Abstract
We present a design for an acoustic metamaterial that mimics the behaviour of the active cochlea. This material is composed of a size-graded array of cylindrical subwavelength resonators, has similar dimensions to the cochlea and is able to reproduce the frequency separation of audible frequencies. Non-linear amplification is introduced to the model in order to replicate the behaviour of the cochlear amplifier. This formulation takes the form of a fluid-coupled array of Hopf resonators. We seek solutions based on a modal decomposition, so as to retain the physically-derived coupling between resonators.
References in corpus (7)
- Essential nonlinearities in hearing
- Auditory Sensitivity Provided by Self-tuned Critical Oscillations of Hair Cells
- Seismic metasurfaces: Sub-wavelength resonators and Rayleigh wave interaction
- The physics of hearing: fluid mechanics and the active process of the inner ear
- The Active Traveling Wave in the Cochlea
- The Cochlear Tuning Curve
- Graded resonator arrays for spatial frequency separation and amplification of water waves