10
DATA
4
1.5m
1m
MICROPHONE
UNIT
GROUND
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
90
80
70
60
50
40
30
20
10
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
63
125
250
500
1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
PUHZ-W85VHA2(-BS).UK
PUHZ-W85VHA2R1(-BS).UK
PUHZ-W85VHA2R3(-BS).UK
PUHZ-W85VHA2R4(-BS).UK
PUHZ-W85VHA2R5(-BS).UK
COOLING
MODE
HEATING
48
SPL(dB)
48
LINE
4-1. NOISE CRITERION CURVES
OCH465D
