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sci.room-acoustics-noise-criterion Calculator
Calculates Noise Criterion (NC) rating from octave band SPL measurements and compares to NC curves for different space types. NC-35 is recommended for open offices; NC-25 for bedrooms; NC-20 for recording studios — NC rating equals the NC curve tangent to the highest measured octave band level.
Inputs
Nc Target
Reference formula or conversion factor shown for context.
Measured 250Hz Db
Reference formula or conversion factor shown for context.
Measured 500Hz Db
Reference formula or conversion factor shown for context.
Measured 1000Hz Db
Reference formula or conversion factor shown for context.
Measured 2000Hz Db
Reference formula or conversion factor shown for context.