Musical notes, like all sounds, are a result of the sound waves created by movement, like the rush of air through a trumpet. Musical notes are very regular sound waves. The qualities of these waves – how much they displace molecules, and how often they do so – give the note its particular sound. How much a sound wave displaces molecules affects the volume of the note. How frequently a sound wave reaches your ear determines whether the note is high or low pitched. When scientists describe how high or low a sound is, they use a numerical measurement of its frequency, such as "440 vibrations per second," rather than the letters musicians use.
All of the following are true statements about pitch, according to the passage, EXCEPT:
A. Nonmusical sounds cannot be referred to in terms of pitch.
B. Pitch is solely determined by the frequency of the sound wave.
C. Pitch is closely related to the vibration of molecules.
D. Pitch cannot be accurately described with letter names.
E. Humans’ perception of pitch is not affected by the intensity of the sound wave.
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