a longitudinal wave that is caused by vibrations and that travels through a material medium (substance)
the complete back and forth motion of an object
what longitudinal waves are made of
compressions and rarefactions
what direction to sound waves travel
if no one is around to hear them, can sound waves be heard?
_________ vibrate along the path of a sound wave
what do air particles travel along the path of?
does air travel
sound waves can mix together
type of hearing loss associated with a ringing in the ear and caused by loud noises
how can you help prevent hearing loss
wear headphones and lower the volume. walk away from loud noises
how does temperature affect the speed of sound
the cooler the medium, the slower the speed of sound
does sound travel faster or slower in metals
does sound travel slower in water or air
the medium through which sound waves affects the ______
speed of sound
sound travels slowest in what medium? Why?
solid because the particles are compressed (close together)
sound travels fastest in what medium? Why?
gas because the particles are further apart
how high or low a sound seems to be perceived (heard)
pitch is dependent upon ______
the frequency of sound
the amount of crests or troughs within a given time
sound which has a frequency too high for a human to hear
sound which has a frequency too low for a human to hear
pitch for human's range of hearing
20Hz - 20,000 Hz
any sound that has a non-musical sound that is a random mix of frequency or pitches
a phenomenon that happens when an object vibrating at or near a resonant frequency of a second object
apparent change in frequency of a sound cauesed by the motion of either the listener or the source of sound
if you are in the center of a sound, what can you not hear?
what will a person in front of the source of sound hear?
sound waves closer together will be heard
what will a person behind the source of sound here>
sound waves further apart and at a lower frequency will be heard
a measure of how well a sound can be heard
amplitude of sound is determined by ______
how loudness is measured
how does loudness carry across distance?
louder noises carry farther distances than softer sounds
reflected sound wave that results when sound hits a surface that is flat and hard
usage of reflected sound waves to find objects
how is sonar used?
submarines mapping fish finders
how is ultrasonography used
when the compressions of one sound overlap the compressions of another wave and produce a louder sound and higher amplitude
when the compression of one sound wave overlaps the rarefaction of another and produces a softer sound and decreases the amplitude
the constructive interference of sound waves produced by a jet reaching supersonic speeds
a speed faster than the speed of sound
a speed slower than the speed of sound
the explosive sound heard when a shock wave reaches your ear