Panasonic U-26PE1U6 Technical Data & Service Manual page 88

1-8. Noise Criterion Curves
Ceiling (Type T2)
: S-26PT2U6
MODEL
SOUND LEVEL : High
Low
CONDITION
: 3.3 ft. from front of outlet at height of 3.3 ft.
SOURCE : 208-230V, 1 Phase, 60Hz
90
80
70
60
50
1
40
30
Approximate
20
minimum
audible limit for
continuous noise
10
Overall 63 125 250 500 1000 2000 4000 8000
Frequency at center of sound pressure band (Hz)
: S-42PT2U6
MODEL
High
SOUND LEVEL :
Low
CONDITION
: 3.3 ft. from front of outlet at height of 3.3 ft.
: 208-230V, 1 Phase, 60Hz
SOURCE
90
80
70
60
50
40
30
Approximate
20
minimum
audible limit for
continuous noise
10
Overall 63 125 250 500 1000 2000 4000 8000
Frequency at center of sound pressure band (Hz)
39 dB(A)
31 dB(A)
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
46 dB(A)
36 dB(A)
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
: S-36PT2U6
MODEL
SOUND LEVEL : High 42 dB(A)
Low 35 dB(A)
CONDITION
: 3.3 ft. from front of outlet at height of 3.3 ft.
SOURCE : 208-230V, 1 Phase, 60Hz
90
80
70
60
50
40
30
Approximate
20
minimum
audible limit for
continuous noise
10
Overall 63 125 250 500 1000 2000 4000 8000
Frequency at center of sound pressure band (Hz)
1-80
1. Specifications
High
Low
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20