Four D10 I/O subsystems 6.2
5
6.2
5
46
6
46
6
Notes:
1. Noise levels cited are for the typical configuration (A-Frame: Bulk Power, CEC cage, battery
option, media drawer, and two I/O drawers).
2. The 0.6-B (6-dB) reduction in noise emission levels with the acoustical rear door corresponds
to a factor of 4 reduction. That is, the noise level of a single A-Frame with Slimline covers is
about the same as the noise level of four A-Frames with acoustical covers.
3. L
WAd
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound
pressure level at the 1-meter bystander positions;1B=10dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with
ISO 9296.
pSeries 7311 Model D20 Declared Acoustical Noise Emissions
Acoustical Characteristic
Product Configuration Declared A-Weighted Sound
Power Level, L
WAd
(B)
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Operating Idle Operating Idle
D20 I/O subsystem 6.1
5
6.0
5
44
6
43
6
Notes:
1. Noise levels cited are for the typical configuration (A-Frame: Bulk Power, CEC cage, battery
option, media drawer, and two I/O drawers).
2. The 0.6-B (6-dB) reduction in noise emission levels with the acoustical rear door corresponds
to a factor of 4 reduction. That is, the noise level of a single A-Frame with Slimline covers is
about the same as the noise level of four A-Frames with acoustical covers.
3. L
WAd
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound
pressure level at the 1-meter bystander positions;1B=10dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with
ISO 9296.
202 Eserver pSeries 7311 Model D10 and Model D20 Service Guide
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