Boom cars (ot for sure...)

From: joe <>
Date: Thu Jun 21 18:19:15 2001

At 04:57 PM 6/21/01 -0500, you wrote:
>On Thu, 21 Jun 2001, Jim Strickland wrote:
> > Perhaps a trip to soundtrack for a sufficient stereo of your own,
> > some protective earphones, and a good cd of the 1812 overature?
>What piece did they use in _Apocalypse Now_ when the air cavalry took
>the beach?
>I remember seeing a news spot a few years ago about some company designing
>ear protection devices which used destructive interference to cancel out
>loud noises.
>Although it would be near impossibly complex problem to solve. It'd be
>pretty damn cool if you could build a device which would use destructive
>interference to completely negate the sound output from a nearby
>automobile stereo system.

     It might be difficult but it's not impossible. They're using systems
like that on US Army tanks right now. Emerson Electric in Longwood
(Orlando area) is one of the companies that's supposed to be making the


>It would of course be controlled using a 6502 based 8-bit micro to be on
>topic for the list.
Received on Thu Jun 21 2001 - 18:19:15 BST

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