| A | B |
|---|
| Echo | a reflected sound wave |
| elasticity | ability of a material to bounce back |
| density | amount of mass in given volume |
| Loudness | the energy of sound |
| intensity | amount of energy a sound wave carries per second per unit of area |
| decibel | measurement of loudness of sound |
| pitch | how high or low a sound is based on frequency |
| ultrasound | frequencies above what human's can hear |
| infrasound | frequency below what human's can hear |
| larynx | human voice box |
| doppler effect | change in frequency of wave as source of sound moves |
