| A | B |
|---|
| Elasticity | The ability of a material to bounce back after being disturbed |
| Density | How much matter there is in a given space |
| Intensity | The amount of energy a wave carries |
| Decibels | Unit of measurement for loudness |
| Pitch | How high or low the sound seems to a person |
| Doppler effect | The apparent change in frequency as a wave source moves in relation to the listener |
| Medium | The material through which a wave travels |
| Mechanical wave | Waves that require a medium to travel through |
| Vibration | A repeated back and fourth or up and down motion |
| Transverse wave | A wave that moves perpendicular to the direction the wave travels |
| Longitudinal wave | A wave that moves parallel to the direction of the wave |
| Surface wave | Waves that are combinations of transverse and longitudinal waves |
| Compressions | Parts of a wave that are close together |
| Rarefactions | Parts of a wave that are spread apart |
| Crest | Highest parts of the wave |
| Trough | Lowest parts of the wave |
| Amplitude | The distance from rest to crest or trough |
| Wavelength | The distance from crest to crest or from trough to trough |
| Frequency | Number of complete waves that pass a point in 1 second |
| Hertz | Measurement of frequency |
| Reflection | When a wave hits an object and bounces back |
| Diffraction | Bending of waves around the edge of a barrier |
| Interference | When two or more waves meet |
| Resonance | When vibrations traveling through a medium match an objects natural frequency |
| Larynx | Another name for the voice box |
| Dissonance | Sounds produced when notes have no musical relationship |
| Acoustics | The study of how well a sound can be heard in a particular room |
| The frequency | The pitch of the sound wave depends on what |
| Timbre | The quality of the sound that you hear |
| Ultrasounds | Sounds above normal human hearing |
| Infrasounds | Sounds below human hearing |
| Eardrum | Object located between the ear canal and the middle ear |
| Cochlea | Part of the ear that changes sound waves into nerve impulses |
| Sonar | Used to measure reflected sound waves |
