Electra Alpha 12 SP EU R410A, Service Manual, Page: 52 / 126

6-1
SOUND LEVEL CHARACTERISTICS
SM ASP 1-E.2 GB
6. SOUND LEVEL CHARACTERISTICS
6.1 Sound Pressure Level
6.2 Soud Pressure Level Spectrum
(Measured as Figure 1)
ASP 9 ASP 12
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
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
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
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
1m
0.8m
Mic.
Unit
Wall
Figure 1
FAN SPEED LINE
HI
ME
LO
CONTENT