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A fiber Bragg grating microphone has been developed and tested in the audible frequency range. The fiber Bragg grating is longitudinally attached to a membrane that vibrates in response to acoustic vibrations and is prestrained. The frequency and amplitude of the sound are encoded in the wavelength shift. The microphone can also pick up voices dynamically from a distance of a few meters. The simplicity of principle and structure of this fiber grating sensor provides scope for commercialization as an optical microphone. (c) 2006 American Institute of Physics.
Keyword:
ULTRASOUND
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IF:
3.6
论文数:
10.4W
被引数:
17.8W
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Prospects for Fibre Bragg Gratings and fabry-perot interferometers in fibre-optic vibration sensing光纤布拉格光栅和法布里-珀罗干涉仪在光纤振动传感中的前景.png)
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