The speed and attenuation of sound in moist air varies with sound frequency and air humidity.
Attenuation and speed of sound in air varies with the frequency of the sound and the air humidity.
Attenuation

Download and print Air Humidity and Sound Attenuation Chart
Speed of Sound

Download and print Air Humidity and Speed of Sound Chart
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- Engineering ToolBox, (2019). Sound - Attenuation and Speed vs. Sound Frequency and Air Humidity. [online] Available at: https://www.engineeringtoolbox.com/air-speed-sound-attenuation-humidity-frequency-d_2161.html [Accessed Day Mo. Year].
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