Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 81
Noise Criterion Curves, HIGH 35 dBA, NC 29/ LOW 26 dBA, NC 20
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1-8. Noise Criterion Curves 1. Specifications Concealed Duct (Type F2) MODEL : S-26PF2U6 SOUND LEVEL : HIGH 35 dB(A), NC 29/ LOW 26 dB(A), NC 20 CONDITION : 4.9 ft. directly below unit SOURCE : 208-230V,1Phase,60Hz 90 MODEL : S-36PF2U6 SOUND LEVEL : HIGH 39 dB(A), NC 33/ LOW 31 dB(A), NC 24 CONDITION : 4.9 ft. directly below unit SOURCE : 208-230V,1Phase,60Hz 90 OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar) OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar) 80 80 70 NC-70 70 NC-70 60 60 NC-60 NC-60 50 50 NC-50 NC-50 40 40 NC-40 NC-40 30 APPROXIMATE 20 THRESHOLD OF HEARING FOR CONTINUOUS NC-30 NC-20 30 APPROXIMATE 20 THRESHOLD OF HEARING FOR CONTINUOUS NC-30 1 NC-20 10 NOISE 10 NOISE 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz 1-73