A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...

The approach uses high-frequency sound waves, usually in the megahertz (radiofrequency) range, to periodically modify the refractive index of a crystal through which a laser beam propagates.

A pioneering clinical trial is testing whether focusing high-frequency sound waves onto the surface of bone where cancer has spread can burn away the source of pain. The cutting-edge technique focuses ...

This means that, unlike many materials, it operates as a guide for the high-frequency sound waves and lets them more freely ...

A barrier should be at least high enough to obscure the 'line of sight' between the noise source and ... It should be remembered that a barrier's performance can be severely reduced by temperature and ...

A barrier should be at least high enough to obscure the 'line of sight' between the noise source and ... It should be remembered that a barrier's performance can be severely reduced by temperature and ...

For homeowners worried about snakes invading their property, ultrasonic snake repellents seem like an easy and harmless ...

Sound vibrations leave the singer's ... Carrier Wave Generator The Wave Generator creates a high-frequency radio signal. The frequency of this signal is many times greater than the frequency ...