Electric cars' silence seen as danger
Automakers look for noises that alert walkers, don't annoy drivers
Posted: September 28, 2009 at 5:22 a.m.
After years of trying to make cars sound as if they were riding on air, engineers are considering how they might bring back some noise. They're trying to make some of them - those silent hybrids - more audible.
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Business, Pages 10, 11 on 09/28/2009
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