IBM pSeries 670, Service Manual

Page: 984 / 1032

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).
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
Processor Subsystem 6.1
5
6.1
5
44
6
44
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. LWAd is the upper-limit A-weighted sound power level; LpAm is the mean A-weighted sound 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.
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pSeries 670 Service Guide