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Page 18
6-3. NOISE CRITERION CURVES
MICROPHONE
1m
UNIT
1m
GROUND
PUH-P1VGAA.UK
PUH-P1VGAA1.UK
MODE SPL(dB)
COOLING
46
HEATING
48
PU/PUH-P1.6VGAA.UK
PU/PUH-P1.6VGAA1.UK
PU/PUH-P1.6YGAA.UK
PU/PUH-P1.6YGAA1.UK
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
MODE SPL(dB)
COOLING
48
HEATING
49
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
500
1000
2000
4000
8000
MODE SPL(dB)
COOLING
48
HEATING
50
LINE
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
250
PU/PUH-P2.5VGAA.UK
PU/PUH-P2.5VGAA1.UK
PU/PUH-P2.5YGAA.UK
PU/PUH-P2.5YGAA1.UK
LINE
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
10
125
NC-20
BAND CENTER FREQUENCIES, Hz
90
20
LINE
90
BAND CENTER FREQUENCIES, Hz
PU/PUH-P2VGAA.UK
PU/PUH-P2VGAA1.UK
PU/PUH-P2YGAA.UK
PU/PUH-P2YGAA1.UK
MODE SPL(dB)
COOLING
47
HEATING
49
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
BAND CENTER FREQUENCIES, Hz
BAND CENTER FREQUENCIES, Hz
18
8000