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

Acoustical Noise Emissions

The equivalent continuous A-weighted sound pressure level at workstations (emission sound pressure
level at the 1-meter bystander positions) does not exceed 70 dB(A).
Der Geräuschpegel der Einheit ist kleiner oder gleich 70 db(A).

pSeries 7311 Model D10 Declared Acoustical Noise Emissions

Product Configuration
One D10 I/O subsystem
Two D10 I/O subsystems
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 is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound pressure level at the
WAd
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 is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound pressure level at the
WAd
1-meter bystander positions; 1 B = 10 dB.
4. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
182 Eserver pSeries 7311 Model D10 and Model D20 Service Guide
Declared A-Weighted Sound Power
Level, L (B)
WAd
Operating
5
5.6
5
5.9
5
6.2
Declared A-Weighted Sound Power
Level, L (B)
WAd
Operating
5
6.1
Acoustical Characteristic
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Idle Operating
5 6
5.6 40
5 6
5.9 43
5 6
6.2 46
Acoustical Characteristic
Declared A-Weighted Sound
Pressure Level, LpAm (dB)
Idle Operating
5 6
6.0 44
Idle
6
40
6
43
6
46
Idle
6
43