The debate rages on about the sound, or rather the lack of sound, coming from electric vehicles. Their relative quietude could make roadside-housing rather more tenable in the future, but, if you ask some people, will turn those cars into silent killers. We've seen some crude noisemakers attempt to make those cars a bit less lethal, but that just brings us back to the noise pollution issue again. ECTunes has what sounds like a solution that will better appeal to both camps: directional sound. The prototype Citroen pictured above emits tones only audible to those right in
