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The speed of sound in air changes clearly with temperature, a little bit with humidity − but not with air pressure (atmospheric pressure).
Statement: The static air pressure p_ and the density ρ of air (air density) are proportional at the same temperature, because the ratio p_ / ρ is always constant, on a high mountain or even on sea level altitude.
Notice: The ratio p_ / ρ (static air pressure to air density) is really always constant.

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Marielle Crist

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2y ago

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http://www.ndt-ed.org/EducationResources/HighSchool/Sound/tempandspeed.htm


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