Microscale implementation of a bio-inspired acoustic localization device
Luke J. Currano, Haijun Liu, Danny Gee, Benjamin K. Yang, Miao Yu · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2009
We present a microscale implementation of an acoustic localization device inspired by the auditory organ of the parasitic fly Ormia Ochracea. The device consists of a pair of circular membranes coupled together with a beam. The coupling serves to amplify the difference in magnitude and phase between the response of the two membranes as the incident angle of the sound changes, allowing directional information to be deduced from the coupled device response. The device was fabricated using MEMS technology and tested with laser Doppler vibrometery. Amplification factors of up to 7 times were observed in the phase difference between the membranes at 90 degree incident sound angles, with directional sensitivity of up to 0.3μs/degree.