1.3.2.5
Noise Level Test
The cabinet was isolated in a noise-controlled environment and a noise level meter was set up at a distance of
30 cm in front of the cabinet and 38 cm above the work surface. With the cabinet running under normal
parameters, the instrument was used to obtain a noise level of the cabinet during normal operation.
Result: dBA
Acceptance: Less than 67 dBA (Based on IEST-RP-CC002.3 Section 6.11)
Result: Pass/ Fail
Disclaimer:
3.
This noise test was done in the factory that is susceptible to reflective, reverberant, and background
noise effect. This noise figure may be different than the brochure value that is obtained from anechoic
chamber.
4.
If the difference between cabinet and ambient noise was less than 10 dBA, correction chart was used,
which combined with transient ambient noise, may vary the corrected noise level by ± 1.5 dBA.
Testing was performed in accordance with the following IEST (Institute of Environmental Sciences and
Technology) contamination control document: IEST-RP-CC002.3 “Recommended Practice for Unidirectional
Flow Clean Air Devices” Section 6.11.
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