| A | B |
|---|
| sound | a type of energy produced by vibrations |
| variable | something in an experiment that can be changed and can affect the outcome of the experiment |
| ultrasonic | sounds above the range of human hearing |
| infrasonic | sounds below the range of human hearing |
| audible | sounds within the range of human hearing |
| wavelength | the distance between two consecutibe crests or troughs |
| amplitude | the distance of a wave from the midline of the wave |
| frequency | the number of waves that pass a certain point in a set amount of time |
| crest | the top portion of a wave |
| trough | the bottom portion of a wave |
| volume | the loudness of a sound |
| vibration | a rapid back and forth motion or movement |
| pitch | the highness or lowness of a sound |
| medium | any substance that carries sound waves |
| wave | a periodic disturbance |
