Electra Alpha 12 SP EU R410A, Service Manual, Page: 53 / 126

6-2
SOUND LEVEL CHARACTERISTICS
SM ASP 1-E.2 GB
6.3 Outdoor units
6.4 Sound Pressure Level Spectrum
(Measured as Figure 2)
CSP9 RC R22 Cooling CSP9 RC R22 Heating
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
S
OUND
PRESSURE
LEVEL,
dB
re
0.002
MICRO
B
AR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
P
RESSURE
LEVEL,
dB
re
0.002
MICRO
B
AR
1m
Mic.
Unit
Ground
Figure 2
CSP12 RC R22 Cooling CSP12 RC R22 Heating
CONTENT