version 1.0 43
DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
43
The Declared A-weighted Sound Pressure Level in decibels (re 2x10-
5
Pa), at Operator, Bystander, and Desk Side Positions are measured
in accordance with ISO 7779 7.6.1, 7.6.2, and C.15.2 and declared in accordance with ISO 9296 for this product is as follows
1
:
OPTIPLEX 755 MT
OPERATING
MODE
TYPICAL CONFIGURATION
DECLARED SOUND PRESSURE (L
pA
)
HIGH-END CONFIGURATION
DECLARED SOUND PRESSURE (L
pA
)
Operator
Position
(L
pA
)
Bystander
Position
(L
pA
)
DeskSide
Position
(L
pA
)
Operator
Position
(L
pA
)
Bystander
Position
(L
pA
)
DeskSide
Position
(L
pA
)
Idle 28 23 22 31 26 22
HDD Operating 29 24 22 31 26 22
ODD Operating 42 36 33 42 36 34
90% CPU 29 24 22 34 29 25
1
All tests are conducted according to ISO 7779 and declared according to ISO 9296 except 90% CPU. For this mode, the system CPU was stressed at 90% utilization with no other
peripheral device actively seeking. This test mode is not specied in ISO 7779, but was measured using the same microphone distances and measurement techniques dened
for the other reported operating modes.
acoustic noisE EMission inforMation, cont.
