Vocab 1
A ______ ______ is a longitudinal wave that is caused by vibrations and travels through a medium.
sound wave
The most common unit used to express loudness is the _______
decibel
____ happens when a sound wave matches the natural frequency of an object and causes the object to vibrate
resonance
In a __________ _______ the particles of a medium vibrate in the same direction that the wave travels.
longitudinal wave
The _______ ________ is a change in the observed frequency of a wave
doppler effect
_______ is the use of echoes, or reflected sound waves to find objects.
echolocation
____ is how high or low you think a sound is.
Pitch
An _____ is a reflected sound wave
echo
_________ are sound waves with frequencies greater than 20,000 Hz.
ultrasound
_____ is a measure of how well sound could be heard
Loudness
_________ happens when two or more waves overlap and combine to form one wave
interference
_______ is a system that uses sound wave to determine the locations of an object or communicate
sonar