A great deal of engineering effort has gone into quieting the automobile over the past century.  In most major cities, transportation noise is a huge contributor to environmental noise both outdoors and in (who doesn’t live near a road?)  Vehicle acoustics is a primary focus of many current applied acoustics research programs, with the enthusiastic support of the auto industry.

Even so, some would argue that these great successes in reducing vehicle noise have come at the expense of exhilaration; gunning your engine at a stop light just doesn’t give the thrill that it did in the days of the big block V8.

For those of us that would occasionally like to hear what we’re driving (which yes, sometimes includes even noise-averse acousticians), a Swedish company has developed the SoundRacer.  This gizmo fits into your cigarette lighter socket, and using the socket voltage to sense engine RPM, broadcasts real-time sports car engine sound through your car stereo.  Even if your “sports car” happens to be less than sporting!