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Noise Levels

Noise Levels
Jaime Graymead
May 26, 2020

TECHNICAL BULLETIN: Noise Levels
Date: 14th June 2006

Below are details of the noise pressure levels across the spectrum for some NR noise ratings.

Sound pressure Levels at mid frequencies (Hz)

NRLEVEL31.5Hz63Hz125Hz250Hz500Hz1000Hz2000Hz4000Hz8000HzTypical Applications
NR45867161544845424038Restaurant
NR40836757494440363533General Office
NR35796352453935323028Private Offices
NR30765948403430272523Cinemas
NR25725544352925222018Concert Halls
NR20695139312420171413Broadcasting and Recording studios
NR156647352619151297Audio Labs
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