Bio-inspired active amplification in a MEMS microphone using feedback computation

Guerreiro, Jose; Reid, Andrew; Jackson, Joseph C.; Windmill, James F. C.

doi:10.1109/biocas.2017.8325130

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Miles et al [116] have demonstrated active Q control aimed to reduce damping, here using a proportional and differential gain and feedback scheme to an electrostatic mesh, successfully broadening the resonant response without noise gain. A similar effect can be achieved with pulse train stimulation, changing the phase timing of the pulse with respect to the diaphragm oscillations [117]. Active control over the damping in this manner relies on separate methods of measurement and feedback; for example, piezoelectric measurement of membrane motion and capacitive comb feedback [118], or laser diffraction-based measurement and actuation through a capacitive backplate [119,120].…”

Section: Bio-inspired Active Amplification 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 Active Amplification Sensorsmentioning

confidence: 99%

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

et al. 2023

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“…Motivated by the active mechanisms of signal-detection and processing within biological sensors and systems, past studies have presented novel sensor system architectures that exploit a bio-inspired neuronal model approach namely using the leaky-integrate-and-fire (LIF) neuron [14][15]. It led to the creation of a novel design approach for an acoustic signal processing methodology performed at the transducer level [16][17]. This can be modelled using a feedback control process approach using a mechanical detector (e.g., analogue function) equipped with some sort of electrical computation capabilities (e.g., digital functions) that together can perform peripheral sound processing, hence the "transducer can be part of the signal processing chain", as illustrated in Fig.…”

Section: Adaptive Sound Processingmentioning

confidence: 99%

“…Diagram overview of the feedback control system that is used to implement the concept of adaptive sound processing. Image adapted and redrawn from[16].…”

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confidence: 99%

Enhancing Acoustic Sensory Responsiveness by Exploiting Bio-inspired Feedback Computation

Guerreiro

Jackson

Windmill

2019

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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Engineering acoustic sensors and systems that can be sensitive to small sound levels even when immersed by background noise may require out-of-the-box thinking. Biology can provide inspiration for that, allowing the engineering landscape to borrow interesting ideas and thus solve current human problems. Biological sensor and system designs are a result of many million years of evolutionary processes, which make them very-power efficient and welladapted to perform their function in a living organism. This paper presents a theoretical study of a bio-inspired signal processing concept. The assumption is that by exploiting feedback computation between a front-end acoustic detector and a back-end neuronal based processing, the overall acoustic responsiveness of a sensory system can be controlled and enhanced to target signals of interest. Here, two methods of feedback signal entrainment are compared namely 1:1 and 2:1 resonance modes.

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“…Inspired by the cochlear characteristics, various vibration sensors, microphones, flow sensors, artificial hair cells (AHCs), and artificial cochleae have been designed (Guerreiro et al, 2017; Knisely, 2017; Shintaku et al, 2010). Among these, the development of artificial cochleae and AHCs with the purpose of creating novel cochlear implants and treating sensorineural hearing loss caused by damage to the hair cells (Robles and Ruggero, 2001) has gained traction in recent years (Davaria and Tarazaga, 2022; Davaria et al, 2020; Joyce and Tarazaga, 2015b; Zhao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Self-sensing active artificial hair cells inspired by the cochlear amplifier, Part I: Theoretical and numerical realization

Davaria

Tarazaga

2022

Journal of Intelligent Material Systems and Structures

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The mammalian cochlear amplifier displays a unique nonlinear characteristic of amplifying or compressing the acoustic stimuli based on their level. Designing control algorithms for artificial hair cells (AHCs) with active sensing capabilities could mimic such dynamics. The present work focuses on developing a novel self-sensing active AHC scheme that implements the amplification/compression function of the AHCs and extends the authors’ previous designs for future cochlear implants or sensor design applications. The AHC functions near a Hopf bifurcation and varies the output piezoelectric voltage by a power-law relationship with the input. It is the first time that a self-sensing AHC is modeled as a quadmorph cantilever controlled by a phenomenological cubic damping controller. The AHC’s control signal is supplied to a pair of its piezoelectric layers and the output of the AHC is the sensed voltage of the second piezoelectric pair. This is in contrast to the previous studies where the AHC’s tip-velocity was measured with external sensors. The requirement of permanent external sensors in the system was a strict limitation that is eliminated in this work. An in-depth study of this novel AHC is conducted in this paper and AHC’s implementation is examined experimentally in Part II of the paper.

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Bio-inspired active amplification in a MEMS microphone using feedback computation

Cited by 6 publications

References 12 publications

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

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

Enhancing Acoustic Sensory Responsiveness by Exploiting Bio-inspired Feedback Computation

Self-sensing active artificial hair cells inspired by the cochlear amplifier, Part I: Theoretical and numerical realization

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