Sound

Review A wave can be described as a disturbance that travels through a medium, transporting energy from one location to another location. The medium is simply the material through which the disturbance is moving

Wave Categories An electromagnetic wave is a wave which is capable of transmitting its energy through a vacuum A mechanical wave is a wave which is not capable of transmitting its energy through a vacuum. Sound is a mechanical wave

Sound Sound is a Longitudinal Wave Waves in which the motion of the individual particles of the medium is in a direction which is parallel to the direction of energy transport.

Sound The compressions are regions of high air pressure while the rarefactions are regions of low air pressure.

Sound Since a sound wave consists of a repeating pattern of high pressure and low pressure regions moving through a medium, it is sometimes referred to as a pressure wave

Speed of Sound The speed of sound depends on the elasticity, density, and temperature of the medium.

Speed of Sound Elasticity is the ability of a material to bounce back after being disturbed. Sound travels more quickly that have a high degree of elasticity Best solids-------------gasses Worst

Speed of Sound Density of a medium is how much matter there is in a given amount of space. Sound travels slower in dense materials lead vs steel

Speed of Sound Temperature Sound travels slower at lower temperature within a given medium.

Music In sound, frequencies are commonly referred to as pitch. When two sounds with a frequency difference of greater than 7 Hz are played simultaneously, most people are capable of detecting the presence of a complex wave pattern resulting from the interference and superposition of the two sound waves.

Music Any two sounds whose frequencies make a 2:1 ratio are said to be separated by an octave.