Service manual

24
1m
1m
unit
about 1.4m
MICROPHON
ceiling
Ambient temperature 27˚C
Test conditions are based on JIS Z8731
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROTIMATE
TERESHOLD OF
REARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PCH-6GKSA
Hi
Lo
NOTCH
48
42
SPL(db(A)) LINE