PHYS 1010 Chapter Notes - Chapter 21: Sound, Sound Intensity
6 Oct 2016
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Document Summary
Mixture of a variety of frequencies of sound. Musical sounds have periodic tones (musical notes. The highness or lowness of a tone, governed by frequency. High frequency (rapid vibrations) = high pitch. Low frequency (slow vibrations) = low pitch. Change the note by changing the frequency of the vibrating sound source. Done by altering the tension of strings. Depends on the amplitude of pressure variations within a soundwave. Power (watts) per square meter carried by a sound wave. Human threshold of hearing = 10^-12 w/m^2. Damage to ears begins at 85 decibels. The physiological sensation directly related to sound intensity of volume. Humans are more sensitive to the 3500 range of frequencies. The characteristic sound of an instrument or voice, governed by the number and relative intensities of partial tones. Describes all aspects of sound other than pitch, loudness, and length of tone. A single frequency component sound wave of a complex tone.
