Unidirectional mechanical amplification as a design principle for an active microphone
Reichenbach T, Hudspeth AJ (2011)
Publication Type: Journal article
Publication year: 2011
Journal
Book Volume: 106
Article Number: 158701
Journal Issue: 15
DOI: 10.1103/PhysRevLett.106.158701
Abstract
Amplification underlies the operation of many biological and engineering systems. Simple electrical, optical, and mechanical amplifiers are reciprocal: the backward coupling of the output to the input equals the forward coupling of the input to the output. Unidirectional amplifiers that occur often in electrical and optical systems are special nonreciprocal devices in which the output does not couple back to the input even though the forward coupling persists. Here we propose a scheme for unidirectional mechanical amplification that we utilize to construct an active microphone. We show that amplification improves the microphone's threshold for detecting weak signals and that unidirectionality prevents distortion. © 2011 American Physical Society.
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APA:
Reichenbach, T., & Hudspeth, A.J. (2011). Unidirectional mechanical amplification as a design principle for an active microphone. Physical Review Letters, 106(15). https://doi.org/10.1103/PhysRevLett.106.158701
MLA:
Reichenbach, Tobias, and A. J. Hudspeth. "Unidirectional mechanical amplification as a design principle for an active microphone." Physical Review Letters 106.15 (2011).
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