🚀 go-pugleaf

<BJORNL.89Mar17175300@octopus.tds.kth.se>


> In article <453@corpane.UUCP> sparks@corpane.UUCP (John Sparks) writes:
> %In article <7260@fluke.COM>, inc@tc.fluke.COM (Gary Benson) writes:
> %] The idea behind "anti-noise" as you call it is that you generate an exact
> %] replica of the offending noise, except opposite in polarity.
> 
> %Hmm, In theory you can try taking two speakers from a stereo system and
> %wire one of them opposite polarity from the other. Then when one cone
> %is extending the other is retracting. The two sound sources will be
> %180 degrees out of phase with one another. Make sure you feed the same sound
> %into both speakers.

I just thought of something else. If you took headphones, an amplifier, and
a mike and:

1> mounted the mike close to your ears so that it heard what you would hear.
2> then made the output of the amplifier 180 degrees out of phase with the
input. Reversing the wires on the headphone speakers would be easiest.
3> wear the headphones and adjust the volume till the anti-sound was just
as loud as the sound and it should cancel out.

I have an old pair of headphones at home. I might try this on the upcoming
weekend. 

somehow it sounds too simple to work. but what the hey!

-- 
John Sparks   |  {rutgers|uunet}!ukma!corpane!sparks  | D.I.S.K. 24hrs 1200bps
______________|          sparks@corpane.UUCP          | 502/968-5401 thru -5406
 
If we weren't supposed to juggle, tennis balls wouldn't come three to a can.