[Quietcars] Quiet vehicle warning sounds

[michael townsend]

Ken, how is this supposed to work, with the different types of styled wheels
available and very little of the autos today have hubcaps.  Just curious.
It still doesn't allow for stationary vehicles. 


I have opinions of my own -- strong opinions -- but I don't always agree
with them.
-- President George Bush

Mike Townsend and Seeing Eye dog Brent
Dunellen, New Jersey  08812
emails:  mrtownsend at optonline.net
         michael.townsend54 at gmail.com
H:  732  2005643
C:  732  7189480


-----Original Message-----
From: quietcars-bounces at nfbnet.org [mailto:quietcars-bounces at nfbnet.org] On
Behalf Of Ken Stewart
Sent: Sunday, November 20, 2011 3:35 PM
To: Discussion of new quiet cars and pedestrian safety
Subject: Re: [Quietcars] Quiet vehicle warning sounds

Mark, I still am hopeful someone will try out a very low-tech solution such
as-  a small metal protusion mounted adjacent to the inner side of each
wheel rim that is struck by a flexible protrusion on those rims once each
wheel rotation.  The slower the speed, the louder each clack, and the sound
gets more rapid and softer as the speed increases, similar to a steel ball
bouncing on a roulette wheel.
--- On Sun, 11/20/11, Mark J. Cadigan <kramc11 at gmail.com> wrote:


From: Mark J. Cadigan <kramc11 at gmail.com>
Subject: [Quietcars] Quiet vehicle warning sounds
To: quietcars at nfbnet.org
Date: Sunday, November 20, 2011, 2:23 PM


Hello fellow Federationists,



I am working on researching quiet cars and their affect on blind pedestrians
for a research paper for my Engineering Design course. I am looking for
technical information on the synthetic sound sources manufacturers have
developed for quiet vehicles. I was hoping you could direct me to some
technical specifications about synthetic sound sources for silent or nearly
silent vehicles.



Thanks for your help, 

Mark J Cadigan

Electrical Engineering Department

Suffolk University

mjcadigan at suffolk.edu
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