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26annaherber
chapter 26 anna herber
Question | Answer |
---|---|
Pitch | the highness or lowness of sound frequency |
infrasonic sound | Pitch too low to be heard by human ears (below 20Hz) |
forced vibration | When an object is forced to vibrate b/c another object is vibrating |
ultrasonic frequencies | upper limit of human hearing (higher than 20,000 Hz) |
resonance | occurs when the frequency of a forced vibration matches the object's natural frequency |
natural frequency | refers to the difference in osund that is produced b/c of the shape and elasticiy of the object |
interference | occurs when a compression of one wave overlaps a rarefaction of another wave. |
Beats | special case of interference when 2 slightly different frequencies are sounded together |