Technical Guide

When Dell determines that a specific Enterprise product is to be used primarily when it is sitting on the floor, that is, next to a
user’s feet, then the acoustical specification in the table below applies. Noise from the product should not annoy or otherwise
interfere with the user’s thoughts or speech, for example, on the telephone.
Table 30. Dell Enterprise Category 2, “Floor-standing in Office Environment” acoustical specification
category
Measurement
Position re
AC0158
Metric, re
AC0159
Test Modes, re AC0159 (note must be in steady state, see AC0159, except where
noted below)
Standby in
23±2° C
Ambient
Idle in 23±2° C
Ambient
Operating in
23±2° C
Ambient – if
not otherwise
specified in
the program’s
configuration
document,
then processor
and hard drive
operating
modes are
required
Simulate (that is, set fan
speeds representative) for Idle
at 28° C & 35° C Ambient,
and for 100% loading and
maximum configuration, at 35°
C Ambient
Sound Power LWA,m, B ≤ 4.9 ≤ 5.1 ≤ 5.4 Report
Sound Quality
(both positions
must meet
limits): Front
Binaural HEAD
and Rear
Microphone
Tones, Hz, dB No prominent tones per criteria D.10.6 and D.10.8 of
ECMA-74
Report tones
Tonality, tu ≤ 0.35 ≤ 0.35 ≤ 0.35 Report
Dell Modulation,
%
≤ 35 ≤ 35 ≤ 35 Report
Loudness, sones Report Report Report Report
LpA-single
point, dBA
Report Report Report Report
Front Binaural
HEAD
Transients
● Oscillation (see AC0159), if observed, during 20-
minute steady-state observation, must adhere to
the following two criteria:
○ Max. {ΔLpA} < 3.0 dB
○ Event count < 3 for “1.5 dB < ΔLpA < 3.0 dB”
● Acoustical Jump (see AC0159), during air mover
speed transition from Idle to Operating Mode
must be ≤ 15 dB.
● Startup behavior
○ Report Startup behavior re. AC0159
○ Startup must proceed smoothly, that is, no
sudden or large jumps, and fan speed during
startup must not exceed 50% of its maximum
● Transient inputs: Report time-history sound
pressure levels re AC0159 “Train of Step
Functions on Processor”
N/A
Any Other
● No rattles, squeaks, or unexpected noises
● Sound should be “even” around the EUT (one side should not be dramatically louder
than another)
● Unless otherwise specified, the “default” thermal-related settings shall be selected for
BIOS and iDRAC.
● Specific operating conditions are defined in “Configurations and Configuration
Dependencies” for each platform.
Sound Pressure LpA-reported,
dBA, re AC0158
and program
configuration
document
Report for all
mics
Report for all
mics
Report for all
mics
Report for all mics
Power, thermal, and acoustics 41