| A | B |
|---|
| Larynx | Two folds of tissue that make up the human voice box |
| Elasticity | The ability of a material to bounce back after being disturbed |
| Intensity | The amount of energy per second carried through a unit area by a wave |
| Loudness | The perception of the intensity of a sound |
| Decibels | A unit of measurement of loudness |
| Ultrasound | Sound waves with frequencies above 20,000 Hz |
| Infrasound | Sound waves with frequencies below 20 Hz |
| Pitch | The perception of the frequency of a sound |
| Doppler Effect | The apparent change in frequency of a sound as the source moves in relation to the listener |
| Timbre | The overall quality of a sound |
| Music | A set of tones and overtones combined in ways that are pleasing to the ear |
| Noise | A mixture of sound waves with no pleasing timbre and no identifiable pitch |
| Dissonance | The sound produced when notes that have no musical relationship are played together |
| Acoustics | The study of how well sounds can be heard in a particular room or hall |
| Beats | The regular changes in loudness of a sound when two sounds of different frequencies are played |
| Ear Canal | A narrow region leading from the outside of the human ear to the eardrum |
| Eardrum | A small, tightly stretched, drumlike membrane in the ear |
| Middle Ear | The space behind the eardrum |
| Cochlea | A fluid-filled cavity behind the inner ear |
| Sonar | A system of detecting reflected sound waves |
| Echolocation | The use of reflection of sound waves to navigate and to locate prey |
| Sonogram | An image formed by an ultrasound machine |
