Mimicking the active cochlea with a fluid-coupled array of subwavelength Hopf resonators
Habib Ammari, Bryn Davies
2020Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences22 citationsDOIOpen Access PDF
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 per- form frequency separation of audible frequencies. Nonlinear 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 in the form of a modal decomposition, so as to retain the physically derived coupling between resonators.
Topics & Concepts
ResonatorCochleaCoupling (piping)AcousticsModalPhysicsNonlinear systemMetamaterialOpticsMaterials scienceModal analysisNonlinear acousticsOptoelectronicsCurrent (fluid)Acoustic Wave Phenomena ResearchMetamaterials and Metasurfaces ApplicationsHearing Loss and Rehabilitation