| A | B |
|---|
| crest | highest point of wave |
| communication | various ways sound waves are used |
| compression | sound wave pushes matter together |
| decibel (db) | how loudness of sound is measured |
| Doppler Effect | change in the apparent frequency of a wave |
| echo location | used by animals (bats, dolphins) by bouncing sound to measure distance |
| frequency | number of vibrations in a given unit of time |
| Morse Code | a series of long and short signals standing for letters in the alphabet |
| pitch | how high or low a sound is |
| rarefaction | sound waves spread matter apart |
| resonance | amplification of sound by increasing force of vibration |
| sonar | a device that reflects sound by sending out high frequency sound waves and recording the time it takes |
| sound | a form of energy produced and transmitted by vibrating matter |
| trough | the lowest point of a wave |
| ultrasound | a device used by doctors to see inside the body by using sound waves to bounce off bones, muscles, organs |
| vibration | the rapid back and forth motion of an object |
| wave | a disturbance moving through a medium (solid, liquid, or gas) |
| wavelength | the distance between two compressions |
