Noise Criteria Curves: RC
RC-40#63 to RC-45#8000
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-40#63 | 50 | 67 | 63 | RC-40 | office open |
| RC | RC-40#8000 | 50 | 31 | 8,000 | RC-40 | office open |
| RC | RC-45#1000 | 55 | 45 | 1,000 | RC-45 | restaurant |
| RC | RC-45#125 | 55 | 62 | 125 | RC-45 | restaurant |
| RC | RC-45#2000 | 55 | 41 | 2,000 | RC-45 | restaurant |
| RC | RC-45#250 | 55 | 55 | 250 | RC-45 | restaurant |
| RC | RC-45#4000 | 55 | 38 | 4,000 | RC-45 | restaurant |
| RC | RC-45#500 | 55 | 50 | 500 | RC-45 | restaurant |
| RC | RC-45#63 | 55 | 71 | 63 | RC-45 | restaurant |
| RC | RC-45#8000 | 55 | 36 | 8,000 | RC-45 | restaurant |
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