IBM 9008-22L Site And Hardware Planning page 26

Table 9. Noise emissions for the 9008-22L, 9009-22A, and 9223-22H (continued)
Declared noise emission values in accordance with ISO 9296
Production
description sound power level, L
9008-22L,
9009-22A,
and
9223-22H at
maximum
allowable
ambient
operating
temperature.
Notes:
1. Declared level L
mean A-weighted emission sound pressure level that is measured at the 1-meter bystander
positions.
2. The statistical adder for verification, K
sound power level, L
verification procedures of ISO 9296, if no more than 6.5% of the batch of new equipment has A-
weighted sound power levels greater than (L
3. The quantity L
4. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
5. 10 dB (decibel) equals 1 B (bel).
6. Notice: Government regulations (such as those prescribed by OSHA or European Community
Directives) might govern noise level exposure in the workplace and might apply to you and your
server installation. This IBM system is available in racks with optional acoustical door features that
can help reduce the noise that is emitted from this system. The actual sound pressure levels in your
installation depend upon various factors, including the number of racks in the installation; the size,
materials, and configuration of the room where you designate the racks to be installed; the noise
levels from other equipment; the room ambient temperature, and employees' location in relation to
the equipment. Further, compliance with such government regulations also depends upon various
extra factors, including the duration of employees' exposure and whether employees wear hearing
protection. IBM recommends that you consult with qualified experts in this field to determine
whether you are in compliance with the applicable regulations.
Table 10. Noise emissions for the 9009-41A
Declared noise emission values in accordance with ISO 9296
Production
description sound power level, L
9009-41A
(tower
version (FC
EJUB))
12 Power Systems: Site and hardware planning
Declared A-weighted
WA,m
(B)
6 6
8.3 8.3
is the upper-limit A-weighted sound power level. Declared level L
WA,m
v
, such that there is a 95% probability of acceptance, when using the
WA,m
(formerly called L
WA,c WAd
Declared A-weighted
WA,m
(B)
Operating Idling
5.8 5.5
1, 2, 3, 4, 5
Declared A-weighted
sound pressure level, L
(dB)
70 70
, is a quantity to be added to the declared mean A-weighted
+ K ).
WA,m v
), can be computed from the sum of L
1, 2, 3, 4, 5
Declared A-weighted
sound pressure level, L
(dB)
Operating Idling
43 39
Statistical adder for
verification, K
pA,m
0.3
is the
PA,m
and K .
WA,m v
Statistical adder for
verification, K
pA,m
Operating
0.3
(B)
v
0.3
(B)
v
Idling
0.3