Specifications

-25-
Octave-band frequency [Hz]
Octave-band level dB(0dB=20 Pa)
10
20
30
40
50
60
70
80
90
63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
Note. The measuring point is 1m
from the comp.service panel.
measuring place : dead room
Note. The measuring point is 1m
from the comp.service panel.
measuring place : dead room
1m
1m
10
20
30
40
50
60
70
80
90
63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
Octave-band frequency [Hz]
Octave-band level dB(0dB=20 Pa)
NC-30
NC-20
NC-40
NC-50
NC-60
NC-70
Condition 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
SPL
dB(A)
71.5 77.0 69.0 66.5 65.5 60.0 53.5 50.570.0
50Hz
(dB)
Sound pressure levels (SPL)
Condition 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
SPL
dB(A)
75.5 75.0 71.5 68.5 64.0 58.5 49.0 45.570.0
50Hz
(dB)
Sound pressure levels (SPL)
NC-30
NC-20
NC-40
NC-50
NC-60
NC-70
1m
1m
PRHG-20MYA
PRHG-15MYA
Cooling &
Heating
Cooling &
Heating