Sound permeates the human experience and gets our attention, sometimes traumatically so. Consider the car horn. It is a widespread practical application of this noise-trauma-alert principle -- and an ...

Mark thinks the gadget should be fitted to all cars as standard A NASA engineer has revealed how you can make your car horn sound friendly instead of an angry honk that just annoys other drivers.

The sound of a car horn is enough to make any driver or pedestrian whip their head around, but a California motorist is sounding the alarm on a thorny Constitutional question. In the case of Porter v.