[Quietcars] Quiet vehicle warning sounds

[Mark J. Cadigan]

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