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lindemann chapter 26
Question | Answer |
---|---|
Refers to how low or high sound frequencies appear to be. | pitch. |
Refers to sound pitch too low to be heard by the human to ear(below 20 HZ). | Infrasonic. |
Refers to sound frequencies above 20,000 Hz, the normal upper limit of human hearing. | Ultrasonic. |
A pulse of compressed air or other matter; opposite of rarefaction. | Compression. |
A disturbance in air, or matter, in which the pressure is lowered. Opposite of compression. | Rarefaction. |
A frequency at which an elastic object, once energized, will vibrate. Minimum energy is required to continue vibration at that frequency. | Natural Frequency. |
The vibration of an object that is made to vibrate by another vibrating object nearby. The sounding board in a musical instrument amplifies the sound through this. | Forced Vibration. |
A phenomenon that occurs when frequency of forced vibrations on an object matches the objects natural frequency, and a dramatic increase in amplitude is the result. | Resonance. |
A periodic vibration in the loudness of sound caused by interference when two tones of slightly different frequencies are sounded together. | Beats. |