Service manual

23
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-2GKA
Hi
Lo
NOTCH
42
37
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
PCH-2.5GKA
PCH-3GKA
Hi
Lo
NOTCH
43
37
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
PCH-4GKSA
Hi
Lo
NOTCH
45
40
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
PCH-5GKSA
Hi
Lo
NOTCH
46
41
SPL(db(A)) LINE
5. NOISE CRITERION CURVES