[Quietcars] Quiet vehicle warning sounds

[Ken Stewart]

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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