Article View: comp.dsp
Article #806noise cancellation
From: Gary Burrell
Date: Fri, 08 Jun 1990 10:44
Date: Fri, 08 Jun 1990 10:44
31 lines
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1534 bytes
I was just reminded by a previous article which mentioned to sine waves
cancelling each other out of an item I heard of a few months ago.
Apparently Lotus (Sportscars not Speadsheets :)) was working on a noise
cancillation system for a car, it was something like based on the data
from a whole bunch of sensors out put a waveform which cancels all the regular
(repeating) noise ie regular engine noise, road noise etc.
Does any one have any information on this. I could see all sorts of
places were a system like this could be used, factories, aircraft etc.
I know noise cancelation is theoretically possible but how does one
deal with it in reality. ie ensuring the output signals are in the opposit
phase from the input, delay due to distance traveled (does this make it
feasable only for very small areas.)
Inquiring minds want to know
Gary R. Burrell
<<<<<<******>>>>>>
Gary R. Burrell, Iotek Inc, |*| E-Mail: garyb@iotek.uucp |*|
1127 Barrington St., Suite 100, |*| Fax: (902)420-0674 |*|
Halifax, N.S., B3H 2P8, Canada |*| Phone: (902)420-1890 |*|
Damm it Jim
I'm a Doctor not a Computer Scientist!
*************************************
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!cs.dal.ca!iotek!garyb From: garyb@iotek.UUCP (Gary Burrell) Newsgroups: comp.dsp Subject: noise cancellation Message-ID: <595@mercury.iotek.UUCP> Date: 8 Jun 90 10:44:18 GMT Reply-To: garyb@iotek.UUCP (Gary Burrell) Organization: IOTEK Inc Lines: 31