EV MUST BE HEARD

Hybrid Cars May Include Fake Vroom for Safety
Jim Motavalli, October 14, 2009 (NY Times)

"For decades, automakers have been on a quest to make cars quieter: an auto that purrs, and glides almost silently in traffic.

"They have finally succeeded. Plug-in hybrid and electric cars, it turns out, not only reduce air pollution, they cut noise pollution as well with their whisper-quiet motors. But that has created a different problem. They aren’t noisy enough."

From tjabbala via YouTube

"So safety experts, worried that hybrids pose a threat if pedestrians, children and others can’t hear them approaching, want automakers to supply some digitally enhanced vroom. Indeed, just as cellphones have ring tones, “car tones” may not be far behind — an option for owners of electric vehicles to choose the sound their cars emit.

"Working with Hollywood special-effects wizards, some hybrid auto companies have started tinkering in sound studios...to customize engine noises. The Fisker Karma, an $87,900 plug-in hybrid expected to go on sale next year, will emit a [part starship, part Formula One racer] sound — pumped out of speakers in the bumpers...Nissan is also consulting with the film industry...[for sounds for] its forthcoming Leaf battery-electric vehicle...Toyota has been working with the National Highway Traffic Safety Administration, the National Federation of the Blind and the Society of Automotive Engineers..."

From newscientistvideo via YouTube

"The notion that battery E.V.’s and plug-in hybrids might be too quiet has gained backing in Congress, among federal regulators and on the Internet. The Pedestrian Safety Enhancement Act of 2009, introduced early this year, would require a federal safety standard to protect pedestrians from ultra-quiet cars...A study published last year by the University of California, Riverside and financed by the National Federation of the Blind evaluated the effect of sounds emitted by hybrid and internal-combustion cars traveling at 5 miles per hour...People listening in a lab could correctly detect a gas-powered car’s approach when it was 28 feet away, but could not hear the arrival of a hybrid operating in silent battery mode until it was only seven feet away.

"Some electric-vehicle drivers have taken a low-tech approach to alerting pedestrians. When Paul Scott of Santa Monica, Calif., drives his 2002 Toyota RAV4 electric car, he often rolls down the windows along busy streets and turns up his radio so people know his virtually silent vehicle is there...Mr. Scott, vice president of the advocacy group Plug In America, said he would prefer giving drivers control over whether the motor makes noise...[and] has already warmed up to the idea of a car ring tone..."