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Journal article
Novel Electret Microphone
IEEE sensors journal, Vol.11(4), pp.988-994
04/01/2011
Web of Science ID: WOS:000287097300010
Abstract
This paper introduces a new type of electret microphone with an excellent dynamic range (0-120 dB SPL) and excellent frequency response characteristics over the range of 20 Hz to 20 kHz. The fundamental concept behind the new microphone is the placement of a thin PTFE (Teflon) electret membrane inside the core of a toroidal coil. As the membrane vibrates in response to the sound, a very small magnetic field is created, is picked up by the coil, and is amplified by a superconducting quantum interference device (SQUID) or by a conventional FET amplifier. Analysis and experimental results show that this new transduction mechanism results in a microphone that, while physically larger than other microphones, has substantially better performance in high-bandwidth applications.
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Details
- Title
- Novel Electret Microphone
- Publication Details
- IEEE sensors journal, Vol.11(4), pp.988-994
- Resource Type
- Journal article
- Publisher
- IEEE
- Copyright
- © 2011 IEEE
- Identifiers
- WOS:000287097300010; 99380175952506600
- Academic Unit
- Hal Marcus College of Science and Engineering ; Dr. Muhammad Harunur Rashid Department of Electrical and Computer Engineering
- Language
- English