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 ...

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 ...

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 ...

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.

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 ...

If two capillary jets of water impinge upon one another, one may observe several interesting things, some of which are recorded below. Fig. 1 shows the double nozzle used. It is made of glass with ...

Most often ultrasonic transducers are used for distance ... Due to the low 40 kHz carrier frequency, the sound lacks the higher audio frequencies. But as a result of the effort he put into ...

Ultrasonic linear position sensors and switches use ultrasonic waves in combination with light and frequency readings. Specifically, ultrasonic linear position sensors and switches use surface ...

But a hackier way would be to build a parametric speaker that focuses soundwaves into a narrow beam like [Shane] did with this ultrasonic sound gun ... the source and its frequency, a directed ...