Dell Optiplex 755 Technical Manualbook page 43

Dell™ optiplex™ 755 technical guiDe
acoustic noisE EMission inforMation, cont.
The Declared A-weighted Sound Pressure Level in decibels (re 2x10-
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
operating
moDe
Idle
HDD Operating
ODD Operating
90% CPU
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
1
peripheral device actively seeking. This test mode is not specified in ISO 7779, but was measured using the same microphone distances and measurement techniques defined
for the other reported operating modes.
version 1.0
optiplex 755 mt
typical configuration
DeclareD sounD pressure (l
Operator Bystander
Position Position
(L ) (L )
pA pA
28 23
29 24
42 36
29 24
Pa), at Operator, Bystander, and Desk Side Positions are measured
5
high-enD configuration
) DeclareD sounD pressure (l
pa
DeskSide Operator
Position Position
(L ) (L )
pA pA
22 31
22 31
33 42
22 34
:
1
)
pa
Bystander DeskSide
Position Position
(L ) (L )
pA pA
26 22
26 22
36 34
29 25
43
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