Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!mips!prls!pyramid!lstowell
From: lstowell@pyrnova.pyramid.com (Lon Stowell)
Newsgroups: sci.electronics
Subject: Re: non-magnetic speakers
Message-ID: <130934@pyramid.pyramid.com>
Date: 18 Oct 90 21:41:15 GMT
Sender: daemon@pyramid.pyramid.com
Reply-To: lstowell@pyrnova.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corp., Mountain View, CA
Lines: 17

>In article <1990Oct16.140417.15202@phri.nyu.edu> roy@alanine.phri.nyu.edu (Roy Smith) writes:
>
>There are some rather exotic alternatives.  The first that comes to
>mind is electo-static.  Usually a charged membrane with a grid placed

These do create magnetic fields...as does any transformer or
other moving electrical field.

You may wish to try some of the SHIELDED speakers advertised for
placement next to color TV's which don't much care for magnetic
fields either.....    These plus just a few feet of distance
should keep from affecting your compass...

An irreverent suggestion is to kill the music when you want to
use the compass....besides haven't seen ANY boat compass that is
so accurate that a simple speaker would seriously affect
navigation.....if you need that kind of precision use a gyro..