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 ...

PERSUADING pests to leave buildings through the use of ultrasonics – sounds higher than the human ear can detect – is not a new concept, nor is the use of recorded predator calls. But Martley ...

When we hear the word “Ultrasonic” we often refer it to bats and dolphins communication. Technically, “Ultrasonic” applies to sound that is anything above the frequencies of audible sound, and ...

Sound is a very strange thing. An echo-prone room can be fixed with a single bit of foam in a corner. Noise can be 'cancelled' by playing a reversed sound wave back at your ears. And now a new study ...