| A | B |
|---|
| vibration | a rapid pattern of motion |
| sound | a form of energy |
| compression | section of particles that is pressed together |
| rarefaction | particles spread apart as it moves away from the compression |
| amplitude | the measurement of energy in a wave |
| wavelength | the distance from one point on a wave to the same point on the next wave |
| pitch | how high or how low a sound is |
| ultrasound | a sound wave with a frequency too high to be heard by humans |
| volume | how loud or quiet (soft) a sound is |
| timbre | the quality of sound that separates it from other sounds with the same pitch |
