How loud is a Unison dimming rack?
During the development of the Unison Paradigm/SmartLink DRd dimming rack ETC performed some rudimentary testing of the noise output levels of both a Unison Legacy DR dimming rack and a Unison Paradigm/SmartLink DRd dimming rack.
The testing was done in a stairwell with an ambient noise level of 33dBA.
Unison Legacy DR Rack/
Unison Paradigm/SmartLink DRd Rack Fan dBA Comparison |
| Measurement position |
Background |
DRd
(fan speed: 120 out of 255) |
Unison Legacy DR |
| Front of rack at a distance of 26.5 inches |
33 dBA |
54 dBA |
52 dBA |
| Top of rack 3 inches above fan |
33 dBA |
71 dBA |
64 dBA |
The testing did not break the noise out into frequencies but it should be noted that the Unison Legacy DR rack has a higher pitched whine in the AC fan which is not present in the Unison Paradigm DRd DC fan. The DRd fan is variable speed so these results would vary depending on ambient temperature and module usage.