rarefaction /rar·e·fac·tion/ (rar″ĭ-fak´shun) condition of being or becoming less dense.
rarefaction
rar·e·fac·tion (râr  -f k shn)n. A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave. |
rarefaction
[rer′əfak′shən]
reductions of density of a medium at a location in the medium accompanying the cyclic pressure reductions during the passage of a sound wave.
rarefaction
the condition of being or becoming less dense.
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