6-2
SOUND LEVEL CHARACTERISTICS
SM HDDHED 1-A.1 GB
6.3 Outdoor
units
6.4
Sound Pressure Level Spectrum
(Measured as Figure 2)
Microphone Distance from Unit
YDD009/YDD012 Cooling
YDD009/YDD012 Heating
Hz, BAND CENTER FREQUENCIES
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
-70NC
-60NC
-50NC
-40NC
-30NC
-20NC
MICRO BAR0.002 dB re , OCTAVE BAND SOUND PRESSURE LEVEL
Hz, BAND CENTER FREQUENCIES
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
-70NC
-60NC
-50NC
-40NC
-30NC
-20NC
MICRO BAR0.002 dB re , OCTAVE BAND SOUND PRESSURE LEVEL
Fig.2
