Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 86

1-8. Noise Criterion Curves 4-Way Cassette 36" × 36" (Type U2) MODEL : S-26PU2U6 SOUND LEVEL : High 37 dB(A) Low 28 dB(A) CONDITION : Under the unit 4.9 ft. SOURCE : 208-230V, 1 Phase, 60Hz 60 NC-60 Octave Band Level (dB) *0dB = 0.0002 µbar 50 NC-50 40 NC-40 30 NC-30 Approximate 1 20 minimum audible limit for continuous noise 10 NC-20 63 125 250 500 1000 2000 4000 8000 Frequency at center of sound pressure band (Hz) MODEL : S-42PU2U6 SOUND LEVEL : High 45 dB(A) Low 33 dB(A) CONDITION : Under the unit 4.9 ft. SOURCE : 208-230V, 1 Phase, 60Hz Octave Band Level (dB) *0dB = 0.0002 µbar 60 NC-60 50 NC-50 40 NC-40 30 NC-30 Approximate 20 minimum audible limit for continuous noise 10 NC-20 63 125 250 500 1000 2000 4000 8000 Frequency at center of sound pressure band (Hz) Octave Band Level (dB) *0dB = 0.0002 µbar 1. Specifications MODEL : S-36PU2U6 SOUND LEVEL : High 44 dB(A) Low 32 dB(A) CONDITION : Under the unit 4.9 ft. SOURCE : 208-230V, 1 Phase, 60Hz 60 High Low NC-60 50 NC-50 40 NC-40 30 NC-30 Approximate 20 minimum audible limit for continuous noise 10 63 125 250 NC-20 500 1000 2000 4000 8000 Frequency at center of sound pressure band (Hz) REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values shown in this graph because of the conditions of operation, the structure of the building, the background noise and other factors. 2. The test results were obtained from an anechoic room. NOTE To evaluate "Noise level" the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used. Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select the maximum value (vertical axis) among them. 1-78