These effects are particularly important where sound is propagating over distances ... It should be remembered that a barrier's performance can be severely reduced by temperature and wind gradients.

The frequency of ultrasound is therefore greater than 20,000 hertz. Ultrasound, like audible sounds, is transmitted by means of longitudinal waves. Ultrasound is used in medicine to break up ...

A dog training whistle makes sound waves that have a frequency of 40,000 Hz. Dogs ears can detect the sound, humans can’t because the frequency is above 20 kHz. In 2005, Howard Stapleton from ...

Experiments coupling light and sound reveal the surprising effect that measuring nothing can cool the vibrations of an object ...

The effects of the binaural beat will depend on its frequency and the corresponding brain wave: Beta waves (13-16 Hz) occur when we are awake and alert. Alpha waves (8-12 Hz) happen when we are ...

This sound wave helps one need money and it ... It is a seven-minute frequency and provides an immediate effect on the listener. The Billionaire Brain Wave audio file can be downloaded on a ...