| A | B |
|---|
| frequency | the number of waves produced in one second |
| pitch | the degree of highness or lowness of a sound |
| echo | when sound waves are reflected or they bounce back |
| tone | the quality of sound |
| wavelength | the distance between one wave and the next |
| resonance | deep,rich, and full in tone or sound |
| vibrations | the back and forth motion of an object that causes sound |
| sonar | sound navigation and ranging |
| echolocation | high-pitched sound used by animals to locate objects |
| sound waves | the push of molecules against one another |
