In the first hearing test of live baleen whales, the animals detected much higher frequency sounds than expected, forcing ...

Could rats possess a power that seems ripped from science fiction? Researchers from Harvard University and the University at ...

While other animals like whales, dogs and bats use ultrasound, it's the first recorded case of "defensive ultrasound" being used in frogs. Sound is ... screaming with a high-frequency audio ...

Ultrasound is produced by high frequency vibrations beyond the range of human hearing. The frequency of ultrasound is therefore greater than 20,000 hertz. Ultrasound, like audible sounds, is ...

Ultrasonic transducers send and receive waves for many types of sensing. They convert energy into high frequency sound waves in the ultrasonic range. These sound waves are then focused on a target and ...

Ultrasonic pest repellers emit high-frequency sounds to deter pests such as roaches and rats. Studies have found a lack of evidence that ultrasonic pest repellers control household pests.

A bladder ultrasound gives providers clues about how the bladder expands and holds urine. This article lists conditions ...