| A | B |
|---|
| Doppler Effect | The change in frequency of a wave as its source moves in relation to an observer |
| Echo | A reflected sound wave |
| Elasticity | The ability of a material to bounce back after being disturbed |
| Infrasound | Sound waves with frequencies below 20 Hz |
| Larynx | Two folds of tissue that make up the human voice box |
| Density | The ratio of the mass of a substance to its volume |
| Decibel | A unit used to compare the loudness of different sounds |
| Pitch | Perception of the frequency of a sound |
| Ultrasound | Sound waves with frequencies above 20,000 Hz. |
| Intensity | The amount of energy per second carried through a unit area by a wave. |
| Loudness | Perception of the energy of a sound |
| Overtone | A natural frequency that is a multiple of the fundamental tone’s frequency |
| Reverberation | The echoes of a sound that are heard after a sound source stops producing sound waves |
| Music | A set of tones and overtones combined in ways that are pleasing |
| Fundamental Overtone | The lowest natural frequency of an object |
| Acoustics | The study of how sounds interact with each other and the environment |
