Appendix
D.
Declaration
of
IBM
product
noise
emission
values
General
noise
emission
values
for
the
Cluster
1350
are
shown
in
Table
3.
General
noise
emission
values
for
the
Cluster
1350
Declaration
of
IBM
product
noise
emission
values
Product
configuration
Declared
A-weighted
sound
power
levels
L
WAd
(B)
Declared
A-weighted
sound
pressure
level
L
pAm
(db)
at
1
meter
bystander
position
Cluster
1350
(fully
configured
racks)
8.0
(bels)
operating
8.0
(bels)
idling
62
(db)
operating
62
(db)
idling
Note:
L
WAd
is
the
declared
(upper
limit)
sound
power
level
for
a
random
sample
of
machines.
L
pAm
is
the
mean
value
of
the
A-weighted
sound
pressure
levels
at
the
bystander
(1
-
meter)
positions
for
a
random
sample
of
machines.
All
measurements
are
made
in
accordance
with
ISO
7779
and
declared
in
conformance
with
ISO
9296.
Noise
emission
values
are
different
for
racks
that
contain
BladeCenter
units.
Each
BladeCenter
unit
has
two
blowers
for
cooling.
An
optional
acoustics
module
is
available
that
dampens
the
noise
generated
by
the
blowers.
shows
the
maximum
sound
levels
emitted
by
BladeCenter
units
without
the
acoustics
module
and
with
the
acoustics
module.
This
represents
the
minimum
and
maximum
number
of
BladeCenter
units
that
can
be
installed
in
a
42-U
rack.
Table
4.
Noise
emission
values
for
racks
containing
BladeCenters
Number
of
BladeCenter
units
per
rack
Maximum
sound
power
idle
Maximum
sound
power
operating
Without
acoustics
module
1
7.4
bels
7.4
bels
With
acoustics
module
1
6.9
bels
6.9
bels
Without
acoustics
module
4
8
bels
8
bels
With
acoustics
module
4
7.5
bels
7.5
bels
Without
acoustics
module
6
8.2
bels
8.2
bels
With
acoustics
module
6
7.7
bels
7.7
bels
©
Copyright
IBM
Corp.
2007
41
Summary of Contents for System Cluster 1350
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