How can we calculate the Leq of noise levels? Can we do it in Excel? - Quora
If 20 dB sound is 10 times louder than 10 dB sound, then is 3 dB sound 1 time louder than 2 dB sound? - Quora
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Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 - 0.6 define sone rating conversion dB level dBA phon phone volume intensity calculator dB dBa and Sone relate fan
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NC - the Noise Criterion
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