Panasonic U-26PE1U6 Technical Data & Service Manual page 86

1-8. Noise Criterion Curves
4-Way Cassette 36" × 36" (Type U2)
: S-26PU2U6
MODEL
SOUND LEVEL : High
CONDITION : Under the unit 4.9 ft.
SOURCE : 208-230V, 1 Phase, 60Hz
60
50
40
30
Approximate
1
minimum
20
audible limit
for continuous
noise
10
63 125 250
Frequency at center of sound pressure band (Hz)
: S-42PU2U6
MODEL
: High
SOUND LEVEL
: Under the unit 4.9 ft.
CONDITION
SOURCE : 208-230V, 1 Phase, 60Hz
60
50
40
30
Approximate
minimum
20
audible limit
for continuous
noise
10
63 125 250
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.
37 dB(A)
Low 28 dB(A)
500 1000 2000 4000 8000
45 dB(A)
Low 33 dB(A)
500 1000 2000 4000 8000
MODEL
SOUND LEVEL
CONDITION
SOURCE
60
NC-60
50
NC-50
40
NC-40
30
NC-30
Approximate
minimum
20
audible limit
NC-20
for continuous
noise
10
63 125 250
Frequency at center of sound pressure band (Hz)
NC-60
NC-50
NC-40
NC-30
NC-20
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
1. Specifications
: S-36PU2U6
44 dB(A)
: High
Low 32 dB(A)
: Under the unit 4.9 ft.
: 208-230V, 1 Phase, 60Hz
500 1000 2000 4000
High
Low
NC-60
NC-50
NC-40
NC-30
NC-20
8000