[Quietcars] Quiet vehicle warning sounds

[Mark J. Cadigan]

Thank you for your help in researching this. I have been a follower of this 
list for a couple of years now, but I think this is the first time I posted 
anything. I wish I had an opportunity to stop in at the quiet cars meeting 
last year at convention, but for some reason or other I wasn't able to. Got 
to love national convention, it's an absolute zoo at times.


----- Original Message ----- 
From: "michael townsend" <mrtownsend at optonline.net>
To: "'Discussion of new quiet cars and pedestrian safety'" 
<quietcars at nfbnet.org>
Sent: Sunday, November 20, 2011 10:12 PM
Subject: Re: [Quietcars] Quiet vehicle warning sounds


>I will try and locate info on some of these and repost the links. Sorry for
> the delay.
>
>
>
> 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 Mark J. Cadigan
> Sent: Sunday, November 20, 2011 4:47 PM
> To: Discussion of new quiet cars and pedestrian safety
> Subject: Re: [Quietcars] Quiet vehicle warning sounds
>
> Mr. Townsend,
>
>
>
> Would you happen to have links to or acksess to technical information 
> about
> those systems, all I am able to find is wickipeadia articles, as well as
> press releases. For this research project I need some more technical
> information on how the system works,
>
>
>
> For example,
>
>
>
> Does the sound volume vary with background noise, or does it constantly
> broadcast at all time at the same volume?
>
>
>
> How loud is this sound, sound in decibels as a function of distance?
>
>
>
> What types of sounds are being utilized, EG a recording of an actual 
> engine,
>
> or some sort of space ship sound that will be unrecognizable as a car.
>
>
>
> Are the speakers omni directional, or can u hear the car equally well from
> all directions.
>
>
>
> And, the holy grail of information would be schematics, or some sort of
> technical description or patent applications.
>
>
>
> Thanks
>
> Mark
>
>
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