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| Rate : | 2.9 (based on 5 votes)
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| Views : | 3028 |
| Duration : | 1min 29s |
| Date : | Feb 12, 2010. 14:14 |
| Language : |  English |
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Description : United States Patent 7580533 issued on 25 August 2009 for a new type of microphone based on a laser-photocell pair used for detection of sound pressure... [+]
Description : United States Patent 7580533 issued on 25 August 2009 for a new type of microphone based on a laser-photocell pair used for detection of sound pressure waves in a stream of particles suspended in a stream of air. The stream could be synthetic smoke or fog. This video shows one of the early bench top devices being demonstrated by David Schwartz of Schwartz Engineering & Design.
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From : nantho
News Editor _-_ http://www.tape47.biz/ _-_ http://www.youtube.com/user/Nantho |
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