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definitions and term

the definitions and terms of waves

sound produced when matter vibrates, sound travels as a longitudinal wave
pitch depends on the frequency( how fast the medium vibrates) of a wave
infrasonic sound that is BELOW the range of human hearing (less than 20 Hz)
ultrasonic sound that is ABOVE the range of human hearing (greater than 20,000 Hz)
doppler is a change in the frequency/pitch of a sound wave. it is caused by MOTION between the source and the receiver.
acoustic the science of sound name
Diffraction the change in direction of a wave when it encounters an obstacle
Refraction the bending of waves as they pass from one medium to another at an angle
Standing Wave a pattern of vibration that resembles a stationary wave
Reflection the bouncing back of a wave when it meets a surface or boundary
Constructive interference interference that increases amplitude
Destructive interference interference that decreases amplitude
Principle of superposition method of adding crests and troughs of interfering waves together to describe a new wave
Beats sounds produced by the interference of sound waves that are uses to tune piano strings
Interference the combination of two or more waves that results in a single wave
Nodes points in a standing wave that have no vibration due to destructive interference
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