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 ...

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 ...

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 ...