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Waves and sound

Waves and Sound

QuestionAnswer
wave disturbance that transfers energy from one point to another
wavelength distance between wave crest or troughs
amplitude height of the wave from its trough or crest; energy of the wave
frequency measure of how many crest or troughs pass a given point in a unit of time
sound wave compressional wave produced by vibrations in matter; require a medium and cannot be heard in space
relfection how waves bounce off objects and change their direction of travel; an echo is an example from a sound wave and the speed and wavelength stays the same
hertz number of waves per second; measures frequency
medium substance a waves travels through
vibration movement of particles by a wave
transverse wave wave that transfers energy that travels perpendicular to the motion; as it travels through a medium the matter moves up and down
compressional wave the wave is parallel to the motion of the energy; matter moves back and forth as the wave travel through it
compression in a compressional wave, an area where particles are pushed together
rarefaction in a compressional wave, an area where particles are spread apart
crest highest point in a transverse wave; point of greatest compression in a compressional wave
troughs lowest point in a transverse wave; point of greatest rarefaction in a compressional wave
high-frequency waves have shorter wavelengths and transfer greater energy; high pitch
waves speed depends on medium, not its frequency moves fastest through solid slowest through gas
absorption the transfer of energy when a wave disappears into a surface
pitch highness or lowness of a sound; depends on frequency
high-pitched sounds high frequency
low-pitched sounds low frequency
human sound range 20Hz-20,000 Hz
Doppler effect a sounds pitch seems to change if the source or listener is moving
volume difference of loudness in a sound; determined by the energy of the wave-amplitude
decibels the measurement of a volume of a sound
interference the motion of two or more waves passing through the same medium at the same time
closer to sound the waves are more compressed
Created by: ledee.workman
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