Pseries 7311 Model D20 Declared Acoustical Noise Emissions - IBM eserver pSeries 7311 D10 Service Manual

Four D10 I/O subsystems
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
pressure level at the 1-meter bystander positions; 1 B = 10 dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with
ISO 9296.

pSeries 7311 Model D20 Declared Acoustical Noise Emissions

Product Configuration
D20 I/O subsystem
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
pressure level at the 1-meter bystander positions; 1 B = 10 dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with
ISO 9296.
Eserver pSeries 7311 Model D10 and Model D20 Service Guide
202
6.2
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound
Declared A-Weighted Sound
Power Level, L
Operating
6.1
is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound
5 5
6.2
Acoustical Characteristic
(B)
WAd
Idle
5 5
6.0
6 6
46 46
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Operating Idle
6 6
44 43