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標題: Design and simulation of miniature ribbon microphones
作者: 洪瑞華
Ke, M.L.
Horng, R.H.
Tsai, Y.C.
Chen, G.W.
Chang, C.C.
關鍵字: ribbon microphone;voice coil;microelectromechanical systems (MEMS);magnetic flux density;silicon condenser microphone;diaphragm;backplate
Project: Journal of Micro-Nanolithography Mems and Moems
期刊/報告no:: Journal of Micro-Nanolithography Mems and Moems, Volume 8, Issue 2.
Traditional ribbon microphones cannot be miniaturized owing to the sensitivity of the microphone in proportion to its ribbon length. A novel symmetrical voice coil instead of the traditional ribbon is proposed, designed, and optimized. The new structure of ribbon microphones was fabricated by microelectromechanical systems (MEMS) technology, which allows increasing the effective coil length while reducing the diaphragm dimension. The obtained results present a voice coil length of 77.5 mm under a limited ribbon length of 17 mm. Compared with the conventional ribbon microphones (with ribbon length 50 mm and voice coil length 50 mm), the diaphragm dimension was reduced but its effective length was increased by about 55%, from 50 mm to 77.5 mm. Moreover, the magnetic flux density in the air gap of the magnetic circuit by simulations and experiments is measured to be at 5.1 and 5 kG, respectively. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3142971]
ISSN: 1537-1646
DOI: 10.1117/1.3142971
Appears in Collections:精密工程研究所

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