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

Guerreiro, José and Reid, Andrew and Jackson, Joseph C. and Windmill, James F.C. (2017) Bio-inspired active amplification in a MEMS microphone using feedback computation. In: IEEE Biomedical Circuits and Systems Conference 2017. IEEE, Piscataway, NJ. (In Press)

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    Abstract

    Auditory signal processing relies on feedback mechanisms between mechanical and electrical systems that work together to enhance acoustic conditioning. In this paper a nonlinear amplification mechanism in the mosquito's auditory system is exploited as a model of inspiration. An acoustic system that provides active amplification of sound was developed using feedback computation integrated with a MEMS microphone to implement the concept. Experimental results generated by a purpose-built embedded system show signal amplification and hysteresis which replicate the response shown by the biological mosquito’s hearing system as a function of input sound intensity.