Date:         Sat, 23 Oct 2004 17:00:14 -0800
Reply-To:     Jack <john.cook58@VERIZON.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jack <john.cook58@VERIZON.NET>
Subject:      Re: noise reduction
Comments: To: rrecardo@WEBTV.NET
In-Reply-To:  <3819-417ADFDE-13672@storefull-3176.bay.webtv.net>
Content-type: text/plain; charset=US-ASCII

Has anyone been able yet to quantify roughly how much noise is wind vs road
vs drive, etc.?  It seems like the current investigation is beginning to
point mostly at road noise.  But maybe I'm wrong.

I seem to remember that luxury cars, such as Rolls, use pads of woven metal
at certain (all?) suspension/frame interfaces to dampen direct coupling of
road noise into the frame & body metal.  I suppose this makes the job of
noise suppression within the body easier (or practical?).

My point is that trying to dampen significant amounts of noise in the
existing Vanagon design may take heroic measures; perhaps it's not even
possible.

Is it realistic to consider attacking road noise coupling points on the
Vanagon ala Rolls?  If feasible, this might be simpler with a larger pay-
back in noise reduction, especially when combined with reasonable amounts of
harmonic dampening materials on critical panels.

Totally out of my area, but I'm still interested in reading about the
investigation that's going on now.  Hope those that are working on it
continue to report.

//Jack