Boom cars (ot for sure...)

From: Don Maslin <donm_at_cts.com>
Date: Thu Jun 21 19:19:00 2001

On Thu, 21 Jun 2001, Brian Chase 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.

Lotus Cars (UK), back when Colin Chapman was alive, developed and installed
in one of there closed GT cars such a system to bring cockpit noise down
to a conversational level. Don't know how successful it was, but do
remember the writeup.
                                                 - don

> It would of course be controlled using a 6502 based 8-bit micro to be on
> topic for the list.
>
> -brian.
>
>
Received on Thu Jun 21 2001 - 19:19:00 BST