Sound Waves
Every sound is produced by something that does this.
What is vibrate?
Sound waves generally travel fastest through this state of matter.
What are solids?
This human perception refers to how high or low a sound seems to be.
What is pitch?
A reflected sound wave is called by this name.
What is an echo?
Sound is this type of wave, where particles move back and forth along the wave direction.
What is a compressional wave?
As the temperature of a material increases, the speed of sound through it does this.
What is increases?
The human perception of the energy a sound wave carries.
What is loudness?
Systems that use reflected sound waves to map objects underwater.
What is sonar?
The region of a sound wave where molecules are pushed closer together.
What is a compression?
Sound cannot travel through this because there are no molecules to transmit energy.
What is a vacuum (or empty space)?
Pitch is directly related to this wave measurement (number of wavelengths per second).
What is frequency?
The process used by bats and dolphins to navigate and hunt using sound.
What is echolocation?
The region of a sound wave where molecules are spread farther apart.
What is a rarefaction?
Sound travels about four times faster in this common liquid than it does in air.
What is water?
This wave property is related to the amount of energy the wave carries.
What is amplitude?
The change in frequency that occurs when a sound source is moving relative to a listener.
What is the Doppler effect?
The distance from one compression to the next compression in a sound wave.
What is wavelength?
Sound travels slowest through this state of matter.
What are gases?
Hearing damage can begin to occur at sound levels of about this many decibels (dB).
What is 85 dB?
This occurs when a sound wave bends around an obstacle or spreads after an opening.
What is diffraction?