Comparative analysis of mechanical characteristics of different topologies of the cantilever beam to mimic the function of the cochlea

Zagabathuni, Aparna; Kanagaraj, S.

doi:10.1016/j.matpr.2020.02.678

Cited by 1 publication

(1 citation statement)

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“…While relatively easy to implement, using a beam as a method of acoustic capture is extremely inefficient for lower frequencies due to diffraction around the relatively narrow beam width. The pressure difference between the front and back sides of the cantilever is small, resulting in maximum displacements at resonance in the order of tens of nanometres [57]. The resultant electrical transduction and signal-to-noise level are also prohibitively small since the cantilevers may not rely on capacitive sensing through an electrical backplate, as in a traditional microphone, due to the impact of thin film damping on both the mechanical sensitivity of the device and the resonance frequency [58,59].…”

Section: Bio-inspired Frequency Discriminating Sensorsmentioning

confidence: 99%

Review of the applications of principles of insect hearing to microscale acoustic engineering challenges

et al. 2023

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When looking for novel, simple, and energy-efficient solutions to engineering problems, nature has proved to be an incredibly valuable source of inspiration. The development of acoustic sensors has been a prolific field for bioinspired solutions. With a diverse array of evolutionary approaches to the problem of hearing at small scales (some widely different to the traditional concept of “ear”), insects in particular have served as a starting point for several designs. From locusts to moths, through crickets and mosquitoes among many others, the mechanisms found in nature to deal with small-scale acoustic detection and the engineering solutions they have inspired are reviewed. The present article is comprised of three main sections corresponding to the principal problems faced by insects, namely frequency discrimination, which is addressed by tonotopy, whether performed by a specific organ or directly on the tympana; directionality, with solutions including diverse adaptations to tympanal structure; and detection of weak signals, through what is known as active hearing. The three aforementioned problems concern tiny animals as much as human-manufactured microphones and have therefore been widely investigated. Even though bioinspired systems may not always provide perfect performance, they are sure to give us solutions with clever use of resources and minimal post-processing, being serious contenders for the best alternative depending on the requisites of the problem.

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Section: Bio-inspired Frequency Discriminating Sensorsmentioning

confidence: 99%