click below
click below
Normal Size Small Size show me how
definitions and term
the definitions and terms of waves
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 |