What is the Sound
Sound Sound is produced by a vibrating source that causes the matter around it to move. • No sound is produced in a vacuum - Matter (air, water, earth) must be present! • The vibration of the source causes it to push/pull its neighboring particles, which in turn push/pull its neighbors and so on. • Pushes increase the air pressure (compression) while pulls decrease the air pressure (rarefaction) • The vibration sends a wave of pressure fluctuation through the air Waves • Waves can be longitudinal (the particles move in the same direction of the wave) or transversal (the particles’ movement is perpendicular to the wave’s direction) Sound waves (1) • In sound wave motion air particles do not travel, they oscillate around a point in space. • The rate of this oscillation is known as the frequency of the sound wave and is denoted in cycles per second (cps) or hertz (Hz). • The amount of compression/rarefaction of the air is the amplitude of the sound wave....