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Noise Criterion (NC) - Free Online Calculator

Calculate Noise Criterion (NC) from octave band pressure levels.

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The calculator below can used to calculate the NC - Noise Criterion:

Sound Pressure Level (dB) - Octave band mid-frequency (Hz)

63 Hz (upper limit 83 dB)

125 Hz (upper limit 79 dB)

250 Hz (upper limit 75 dB)

500 Hz (upper limit 72 dB)

1000 Hz (upper limit 71 dB)

2000 Hz (upper limit 70 dB)

4000 Hz (upper limit 69 dB)

8000 Hz (upper limit 68 dB)

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The NC-diagram with the default values from above:

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Related Topics

Acoustics - Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
Noise and Attenuation - Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems.

Related Documents

NC - the Noise Criterion - Noise Criterion - NC - level is a standard uesd to describe the relative loudness of a space within a range of frequencies.
Noise - Acceptable dB_A Level - Acceptable noise - dB_A - level at typical common locations.
Noise Criterion vs. Noise Rating and dB(A) - Comparing Noise Criterion (NC, NCB, RNC) to Noise Rating (NR) and dB(A).
Noise Rating (NR) - Free Online Calculator - An online Noise Rating (NR) calculator.
NR - the Noise Rating Curve - The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.
PNC - the Preferred Noise Criterion - A noise measurement system for continuous or ambient noise in indoor environments.
Preferred Noise Criterion (PNC) - Calculator - An online Preferred Noise Criterion (PNC) calculator.
RC - the Room Criteria - The Room Criteria (RC) is used to measure background noise in buildings for frequencies ranging 16 to 4000 Hz.

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