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Sound (view source)

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→‎Subcategories of Sound: Wrote a sentence and included a reference.

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== Subcategories of Sound ==

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Types of sound include speech, music, noise; dissonant, harmonic, masking (such as low tones making high more difficult to hear); underwater sound, and so forth.<ref>Phillips, R., and others. ''Sound.'' 1971. Funk & Wagnalls New Encyclopedia, Volume 24.</ref>

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==References==

[[Category:physics]]

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