Science

An undesired sound, especially nonmusical sound that includes a random mix of frequencies.

A disturbance that transmits energy as it travels through matter or space.

A wave in which the motion of the particles of the medium is perpendicular to the path of the wave.

A wave, such as a sound wave, in which the particles of the medium move back and forth, parallel to the direction of motion of the wave.

The process by which a wave bounces back after striking a barrier that does not absorb all of the wave's energy.

The result of two or more waves overlapping.

Waves that form a pattern in which portions of the wave do not move and other portions move with increased amplitude.

Sound waves at frequencies below those which humans can hear.