Driving through rural areas at dawn or dusk often means sharing the road with wildlife, particularly deer. Vehicle-deer ...

It’s well known that many animals are particularly sensitive to high-frequency sounds that humans can’t hear. Many commercial pest repellers based on this principle are available, most of them ...

For years ultrasonics meant something only to dogs and other subhuman creatures. One of the few uses of ultra-high sound waves was in whistles, too high-pitched for human ears, to call pets. Today ...

A deer horn, or deer whistle, is a whistle mounted on automobiles to help prevent collisions with deer. Air moving through the device produces sound to warn deer of a vehicle’s approach, usually when ...