NC Rating Calculator

Calculate Noise Criteria (NC) rating from octave band sound pressure levels for occupied spaces.

Sound pressure level in 63 Hz octave band
dB
Sound pressure level in 125 Hz octave band
dB
Sound pressure level in 250 Hz octave band
dB
Sound pressure level in 500 Hz octave band
dB
Sound pressure level in 1000 Hz octave band
dB
Sound pressure level in 2000 Hz octave band
dB
Sound pressure level in 4000 Hz octave band
dB

Results

NC Rating-
Recommended Space Type-
References: ASHRAE Fundamentals Ch. 49, ASHRAE Applications Ch. 49 - Noise and Vibration Control