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Waves and Sound
Term | Definition |
---|---|
Wave | transfers energy from place to place without transferring matter |
Medium | the matter through which sound travels |
Transverse wave | the wave travels perpendicular to the medium (ex. light) |
Longitudinal wave | the wave travels parallel to the medium (ex. sound) |
Wavelength | distance between two points on a wave where the wave pattern is repeated |
Amplitude | maximum displacement from equilibrium |
Frequency | the number of wavelengths in one second, expressed in a unit called Hertz or the # of cycles/ time |
Period | the amount of time it takes for one wave to pass or the time/cycle |
Wave speed | velocity = frequency x wavelength |
Sound | caused by waves that are picked up by your ears (longitudinal) |
Speed of sound depends on | the temperature and elasticity of the medium through which the sound travels |
Pitch | a change in frequency or wavelength |
Doppler effect | change in frequency due to the motion of the source |
Interference | occurs when two or more waves interact with each other |
Standing wave | A wave pattern that remains in a constant position |
Node | the stationary part of a standing wave |
Antinode | the region of maximum displacement and maximum energy |
Resonance | a forced vibration matches the objects natural frequency |