Biomimetic optical directional microphone with structurally coupled diaphragms

Liu, H. J.; Yu, M.; Zhang, X. M.
December 2008
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243902
Academic Journal
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.


Related Articles

  • The Technology Study of Camshaft Treated by Laser Bionic Melting Process in Aqueous Media Cooling. ZHAO Yu; SONG Dong-xue; REN Lu-quan; CHEN Li // Advances in Natural Science;12/31/2010, Vol. 3 Issue 2, p113 

    Biomimetic coupling wear resistance model was created according to biomimetic coupling phenomenon and biomimetic coupling theory, utilize the preparation of aqueous media by laser cooling techniques, process biological coupling unit on the gray cast iron surface according to the organism form,...

  • Expanded metal bellows line.  // Motion System Design Exclusive Insight;4/1/2012, p1 

    The article offers information on six miniature edge-welded metal bellows from BellowsTech.

  • Q&A.  // Motion System Design;Oct2011, Vol. 53 Issue 10, p17 

    The article presents questions and answers related to bellows design including custom bellows design, determining the tradeoff between rigidity and flexibility, and how do electrodeposited metal bellows vary from other types of bellows.

  • Semiclassical analysis of resonance states induced by a conical intersection. Zhu, Chaoyuan; Nikitin, Evgueni E.; Nakamura, Hiroki // Journal of Chemical Physics;5/8/1996, Vol. 104 Issue 18, p7059 

    The resonance states induced by nonadiabatic coupling in the conical intersection problem are analyzed semiclassically. Not only the general framework but also the explicit analytical expressions of resonance positions and widths are presented. Interestingly, the nonadiabatic transition schemes...

  • Modular Bellows Protect Power Plant Damper Shafts.  // Power Engineering;Feb2007, Vol. 111 Issue 2, p75 

    The article evaluates the Gortiflex Molded Bellows from A&A Manufacturing Co. Inc.

  • Non-resonant parametric amplification in biomimetic hair flow sensors: Selective gain and tunable filtering. Droogendijk, H.; Bruinink, C. M.; Sanders, R. G. P.; Krijnen, G. J. M. // Applied Physics Letters;11/21/2011, Vol. 99 Issue 21, p213503 

    We demonstrate that the responsivity of flow sensors for harmonic flows can be improved significantly by non-resonant parametric amplification. Using electrostatic spring softening by AC-bias voltages, increased responsivity and sharp filtering are achieved in our biomimetic flow sensors....

  • 31 CE.  // History of Science & Technology;2004, p78 

    The article cites the invention of the water-powered bellows by Chinese engineer Tu Shih in 31 CE.

  • Extending life with the right coupling. Elliott, Steven // Motion System Design;Oct2008, Vol. 50 Issue 10, p16 

    The article discusses the significance of proper coupling of shafts. It states that misalignment between two shafts in an assembly is inevitable, wherein some of which result from inaccuracy. In designing rotating equipment, the engineers should assume that the assembly is like a breathing...

  • Nanotechnology: dry versus wet engineering? Madou, Marc // Analytical & Bioanalytical Chemistry;Dec2005, Vol. 384 Issue 1, p4 

    This article predicts the future of dry and wet engineering in nanotechnology. It argues that nanotechnology have been practiced by molecular scientists and genetic engineers long before it became popular with electrical and mechanical engineers. It is predicted that biomimetic manufacturing...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics