The compression pressure of the air, which overlays the atmospheric pressure when the sound waves spreads. It is measured as an effective pressure in N/m2, but is stated in Decibels (dB) as a noise level.
Fluidlexikon
The compression pressure of the air, which overlays the atmospheric pressure when the sound waves spreads. It is measured as an effective pressure in N/m2, but is stated in Decibels (dB) as a noise level.
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