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APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-HA30NHA
PUHZ-HA36NHA
COOLING
MODE
HEATING
52
SPL(dB)
53
LINE
5 ft
3.3 ft
MICROPHONE
UNIT
GROUND
9-2. OUTDOOR UNIT