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 ...

Using high-frequency sound waves to make tunable optical filters, modulators and Q-switches is a well-established and convenient technological solution for many applications, reports Neil Savage.

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 ...

High frequency hearing loss causes problems with ... Frequency is a measure of the number of vibrations a sound wave makes per second. For example, a sound measured at 4,000 Hz vibrates 4,000 ...

Mantis shrimp withstand repeated high-impact forces without structural damage. Researchers discovered the shrimp's clubs feature a protective pattern that controls how stress waves travel through its ...

The Memory Wave is designed to activate the gamma waves which are known to enhance cognitive processes and overall brain function. By stimulating these high-frequency brain waves, the program aims to ...

So-called Rayleigh–Bloch waves can release an enormous amount of energy that can damage technical systems under certain circumstances. They only exist below a precisely defined cut-off frequency; ...