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ch. 26
physics ch. 26 vocab
Question | Answer |
---|---|
pitch | term that refers to how high or low sound frequencies appear to be. high pitch = high frequency |
infransonic | term applied to sound to pitch too low to be heard by the human ear that is below 20 hertz. |
ultrasonic | term applied to sound frequencies above 20,000 , hertz the normal upper limit of a human hearing |
compression | in sound , a pluse of compressed air ,opposite of rarefaction. |
rarefaction | a disturbance in air, when the pressure is lowered opposite of compression. |
natural frequency | frequency at which an elastic object, will vibrate. minimum energy required to continue vibration. |
forced vibratation | vibration of an object that is made to vibrate another vibrating object. sounding board. |
resonance | a phenomenon that occurs when frequencies of forecd vibrations matches objects natral frequency, increase in amplitude results. |
beats | when two tones of different frequencies are sounded together. |