TITLE

Biomimetic optical directional microphone with structurally coupled diaphragms

AUTHOR(S)
Liu, H. J.; Yu, M.; Zhang, X. M.
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A biomimetic directional microphone based on structurally coupled diaphragms and a fiber-optic detection system is presented. The microphone design aims to mimic the fly Ormia Ochracea’s ear structure and capture its performance. Experiments show that the designed microphone amplifies the interaural time difference (ITD) by 4.4 times and has a directional sensitivity of 6.5 μs/deg. An important finding is that one needs to utilize both the rocking and translational vibration modes to obtain the appropriate ITD amplification without sacrifice of directional sensitivity. This work can serve as a foundation for realizing fly-ear inspired miniature directional microphones.
ACCESSION #
35922122

 

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