The blind study by Professor Rosenblum indicates there is hybrid noise at 5
mph that could be heard at the same distance as their reference vehicle with 8 dB of hearing aid gain. I have no problem with giving the blind hearing aids and mandating they use them when crossing streets . . . what is good for the goose is sauce for the gander.
There is a real problem with accidents both pedestrian and other but sound makers on hybrids does not address this carnage. Proposing an ineffective solution takes time and effort away from those that address the deaths of 5,000 pedestrians and cyclists. Making hybrids as noisy as today's vehicle only continues the dying.
Bob Wilson