Biomimetic optical directional microphone with structurally coupled diaphragms

H. J. Liu, M. Yu, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

47 Citations (Scopus)


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.
Original languageEnglish
Article number243902
JournalApplied Physics Letters
Issue number24
Publication statusPublished - 29 Dec 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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