Hybrid autos are becoming quieter every year. This sounds like a good thing, but totally silent cars pose a risk to pedestrians (especially young children and the blind.) Surprisingly, a hybrid in silent battery mode can only be heard when approaching within seven feet of the listener.
A possible solution would be to get help from Hollywood to create different sound effects for the cars to emit - which would alert pedestrians of approaching cars. Click on the blue title above to link to online article from the New York Times. Auto buyers may get to choose which sound effects their hybrid will make.
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