Service manual

22
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
PKH-1.6FKA
PKH-2FKA
Hi
Lo
NOTCH
43
36
SPL(db
(A)) LINE
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
PKH-2.5FKA
PKH-3FKA
Hi
Lo
NOTCH
45
39
SPL(db
(A)) LINE
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
PKH-4FKSA
Hi
Lo
NOTCH
46
41
SPL(db
(A)) LINE
UNIT
WALL
1m
1m
MICROPHONE
5. NOISE CRITERION CURVES
Ambient temperature 27:
Test conditions are based on JIS Z8731