10
5-3. NOISE CRITERION CURVES
5ft
3.3ft
MICROPHONE
UNIT
GROUND
90
80
70
60
50
40
30
20
10
63
125
250
500
1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUY-A18NHA6
PUY-A18NHA6-BS
PUZ-A18NHA6
PUZ-A18NHA6-BS
COOLING
MODE
HEATING
48
SPL(dB)
47
LINE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUY-A24/30/36NHA6
PUY-A24/30/36NHA6-BS
PUZ-A24/30/36NHA6
PUZ-A24/30/36NHA6-BS
COOLING
MODE
HEATING
48
SPL(dB)
50
LINE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUY-A42NHA6
PUY-A42NHA6-BS
PUZ-A42NHA6
PUZ-A42NHA6-BS
COOLING
MODE
HEATING
51
SPL(dB)
55
LINE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PUY-A12NHA6
PUY-A12NHA6-BS
COOLING
MODE
46
SPL(dB)
LINE
OCH577A