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From: tfb@unf7.UUCP (t blakely)
Newsgroups: sci.physics,sci.electronics
Subject: Re: noise cancellation
Message-ID: <170@unf7.UUCP>
Date: 4 May 89 16:37:04 GMT
References: <723@wucs1.wustl.edu> <7260@fluke.COM> <453@corpane.UUCP> <739@wucs1.wustl.edu> <20031@srcsip.UUCP> <859@prlhp1.prl.philips.co.uk> <482@atlas.tegra.UUCP> <17419@cup.portal.com> <2283@mace.cc.purdue.edu>
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In article <2283@mace.cc.purdue.edu> du4@mace.cc.purdue.edu (Ted Goldstein) writes:
>All this talk about cancelling the muffler noise of a car has reminded me
>of a study of highway noise I once read (sorry I don't remember where).
>The conclusion they arrived at was that most noise coming from 
>a highway is from car TIRES on the road surafce, and not engine noise.

That's mostly the case.  However for a small (but not tiny) percentage
of vehicles, most of the noise is the "thump...thump...thump" of the
bass from the overpowered stereo.

I guess that as exposure to loud music (loud to drown out tire noise?)
goes on, you just have to keep turning it up.