Save guides, add subjects and pick up where you left off with your BBC account. Although sound travels quite fast, it is still possible to calculate its speed in air. To do this, the time it takes ...

Japanese researchers discovered that specific sound frequencies (440 Hz and 14 kHz) can alter gene expression in mice cells, ...

The sounds cause the surface of the water to oscillate and create desired wave patterns. A particular sound’s amplitude, phase, and frequency can be adjusted using a laptop computer, so that ...

Mag., 4, 417; September 1927) certain physical and biological effects observed with high frequency sound waves of great intensity. To obtain this great intensity, high potentials (of the order of ...

This experiment demonstrates how water affects sound waves and pitch. You'll discover how different water levels create different musical notes and learn about the relationship between mass, vibration ...

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 ...