Acoustic Noise Emission Information; Declared Sound Power (Lwad); A-Weighted Sound Pressure Level (Db) - Dell OptiPlex 3240 Technical Manualbook

Acoustic Noise Emission Information

Declared Sound Power (LWAd)

The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 3240 AIO is as
follows: (all values LWAd expressed in bels; 1 bel=10 decibels, re 10

A-Weighted Sound Pressure Level (dB)

The Declared A-weighted Sound Pressure Level in decibels (re 2x10-5 Pa), at Operator and Bystander
Positions are measured in accordance with ISO 7779 7.6.1, 7.6.2, and C.15.2 and declared in
accordance with ISO 9296 for this product is as follows
Service Level
Hard Drive Accessing
Optical Drive Accessing
Idle
1
All tests are conducted according to ISO 7779 and declared according to ISO 9296 except CPU
Stressed. This test mode is not specified in ISO 7779, but was measured using the same microphone
distances and measurement techniques defined for the other reported operating modes.
2
Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2
40
1
:
Sound Power Sound Pressure
(LWAd, bels) (1 Operator Position
bel=10 deci-bels, (LpAm, decibels)
re 10-12 Watts) (re 2x10-5 Pa)
27.3 21.6
42.2 34.7
27.4 22.5
-12
Watts)
Sound Pressure
Bystander Position
(LpAm, decibels)
(re 2x10-5 Pa)
18.4
30.9
19.1