Noise Criteria Curves: RC
RC-30#2000 to RC-35#250
Noise Criteria (NC) and Room Criteria (RC) curves for HVAC acoustics design. NC curves per ANSI S12.2-2008 from NC-15 through NC-70 (12 curves), and RC Mark II curves per ASHRAE from RC-25 through RC-50 (6 curves). Each curve has 8 octave band center frequencies (63-8000 Hz) with maximum allowable sound pressure levels in dB. Includes recommended occupancy type and equivalent dBA background noise level. 144 records total.
| criterion type | curve point | background noise dBA equivalent (dBA) | max sound pressure level dB (dB) | octave band center Hz (Hz) | rating | recommended occupancy |
|---|---|---|---|---|---|---|
| RC | RC-30#2000 | 40 | 26 | 2,000 | RC-30 | office private |
| RC | RC-30#250 | 40 | 42 | 250 | RC-30 | office private |
| RC | RC-30#4000 | 40 | 23 | 4,000 | RC-30 | office private |
| RC | RC-30#500 | 40 | 35 | 500 | RC-30 | office private |
| RC | RC-30#63 | 40 | 59 | 63 | RC-30 | office private |
| RC | RC-30#8000 | 40 | 21 | 8,000 | RC-30 | office private |
| RC | RC-35#1000 | 45 | 35 | 1,000 | RC-35 | classroom |
| RC | RC-35#125 | 45 | 54 | 125 | RC-35 | classroom |
| RC | RC-35#2000 | 45 | 31 | 2,000 | RC-35 | classroom |
| RC | RC-35#250 | 45 | 47 | 250 | RC-35 | classroom |
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