definitions and term Word Scramble
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| Term | Definition |
| sound | produced when matter vibrates, sound travels as a longitudinal wave |
| pitch | depends on the frequency( how fast the medium vibrates) of a wave |
| infrasonic | sound that is BELOW the range of human hearing (less than 20 Hz) |
| ultrasonic | sound that is ABOVE the range of human hearing (greater than 20,000 Hz) |
| doppler | is a change in the frequency/pitch of a sound wave. it is caused by MOTION between the source and the receiver. |
| acoustic | the science of sound name |
| Diffraction | the change in direction of a wave when it encounters an obstacle |
| Refraction | the bending of waves as they pass from one medium to another at an angle |
| Standing Wave | a pattern of vibration that resembles a stationary wave |
| Reflection | the bouncing back of a wave when it meets a surface or boundary |
| Constructive interference | interference that increases amplitude |
| Destructive interference | interference that decreases amplitude |
| Principle of superposition | method of adding crests and troughs of interfering waves together to describe a new wave |
| Beats | sounds produced by the interference of sound waves that are uses to tune piano strings |
| Interference | the combination of two or more waves that results in a single wave |
| Nodes | points in a standing wave that have no vibration due to destructive interference |
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