IBM RS/6000 Enterprise Server M80, Руководство по обслуживанию, Страница: 514 / 567

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
Noise Emissions
1
With M80 CEC drawer only
L
WAd
L
pAm
<L
pA
>
m
Impulsive or prominent
discrete tones
Operating
6.4 bels
N/A
48 dBA
No
Idle
6.4 bels
N/A
48 dBA
No
Noise Emissions
1
With M80 and Primary I/O Drawer
L
WAd
L
pAm
<L
pA
>
m
Impulsive or prominent
discrete tones
Operating
6.5 bels
N/A
49 dBA
No
Idle
6.5 bels
N/A
49 dBA
No
Noise Emissions
2
L
WAd
L
pAm
<L
pA
>
m
Impulsive or prominent
discrete tones
Operating
5.8 bels
N/A
45 dBA
No
Idle
5.8 bels
N/A
45 dBA
No
1. Noise emissions data are based on the following configuration: the drawer is mounted in a 7014 Series Model
T00 Rack, a power distribution unit is installed in the rack, and the system is operating in a normal environment
of 25 °C (78 °F).
2. Noise emissions data are based on the following configuration: the drawer is mounted in a 7014 Series Model
T00 Rack and a power distribution unit is installed in the rack.
Noise Emission Notes
1. L
WAd
is the declared (upper limit) sound power emission level for a production series of machines.
2. L
pAm
is the mean value of the A-weighted sound pressure emission levels at the operator position (if
any) for a production series of machines.
3. <L
pA
>
m
is the mean value of the space-averaged A-weighted sound pressure emission levels at the
one-meter positions for a production series of machines.
4. N/A = Not Applicable (no operator position).
5. All measurements are made in accordance with ISO 7779 and reported in conformance with ISO 9296.
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Service Guide