Technical Guide

Table 31. Dell Enterprise Category 3, “General Use” acoustical specification category (continued)
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 air mover
speeds representative) for Idle
at 28° C & 35° C Ambient
and for 100% loading and
maximum configuration, at 35°
C Ambient
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
Category 4: Attended Data Center
When Dell determines that a specific Enterprise product is to be predominantly used in an attended data center, then the
acoustical specification of the table applies. The phrase “attended data center” is used to mean a space in which many (from
tens to 1000s) of Enterprise products are deployed in proximity (that is, in the same room) to personnel whose speech (perhaps
with raised voices) is expected to be intelligible over the data center noise. Hearing protection or hearing monitoring programs
are not expected in these areas. Examples in this category include monolithic rack products. When Dell determines that a
specific Enterprise product is to be predominantly used in a general use space, then the acoustical specification of the above
table applies. These products could be found in laboratories, schools, restaurants, open office space layouts, small ventilated
closets, etc., though not in close proximity to any particular person nor in quantities greater than a few in any location. People
within proximity of a few of these products should not experience any impact to speech intelligibility or annoyance from the
noise of the product. A rack product sitting on a table in a common area is an example.
Table 32. Dell Enterprise Category 4, “Attended Data Center” 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)
Simulate (that
is, set fan
speeds
representative
) for 100%
loading and
maximum
configuration,
at 35° C
Ambient
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
Sound Power LWA,m, B Report ≤ 6.9 ≤ 7.1 Report ≤ 8.5
Front Binaural
HEAD
Tones, Hz, dB Report < 15 dB < 15 dB Report < 20 dB
Tonality, tu Report Report Report Report Report
Dell Modulation,
%
Report Report Report Report Report
Loudness, sones Report Report Report Report Report
LpA-single
point, dBA
Report Report Report Report Report
Power, thermal, and acoustics 43