Specifications

A Principled Technologies test report 4
Workstation heat, sound, and power usage: Lenovo ThinkStation
D30 vs. Dell Precision T7600
QUIETER IS BETTER
Any user, given a choice, would prefer a quiet system to a noisy one. As
Figure 2 shows, the Lenovo ThinkStation D30 was quieter than the Dell
workstation. We calculated the difference in perceived volume with the two
workstations using the following formula
2
for sound level change:
        
The change in sound level (  L) is related to the ratio for loudness (or
volume) by using the calculated  L as follows:
  


 


For example, if the level change (  L) is 0.2dB, the ratio for loudness is
1.014x, or 1.4 percent louder.
Using this approach, we determined that the Lenovo ThinkStation D30
was up to 19.7 percent quieter than the other workstation when the systems
were idle and up to 2.8 percent quieter when they were under load.
Figure 2: The Lenovo
ThinkStation D30
was quieter than the
Dell workstation
both when idle and
when under load.
25.1
28.0
27.7
28.4
0
5
10
15
20
25
30
Idle Under load
Decibels
Acoustics (lower is better)
Lenovo
ThinkStation
D30
Dell Precision
T7600
2
http://www.sengpielaudio.com/calculator-levelchange.htm