Sound source localization by Ormia ochracea inspired low-noise piezoelectric MEMS directional microphone.

ABSTRACT: The single-tone sound source localization (SSL) by majority of fly Ormia ochracea's ears-inspired directional microphones leaves a limited choice when an application like hearing aid (HA) demands broadband SSL. Here, a piezoelectric MEMS directional microphone using a modified mechanical model of fly's ear has been presented with primary focus to achieve SSL in most sensitive audio bands to mitigate the constraints of traditional SSL works. In the modified model, two optimized rectangular diaphragms have been pivoted by four optimized torsional beams; while the backside of the whole structure has been etched. As a result, the SSL relative to angular rotation of the incoming sound depicts the cosine dependency as an ideal pressure-gradient sensor. At the same time, the mechanical coupling l

SUBMITTER: Rahaman A 

PROVIDER: S-EPMC7293328 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature