A manufacturing plant contacted Unger Technologies to review noise exposure from several of its variable frequency belt driven centrifugal fans.
We conducted sound level readings around the Chicago Blowers and noted low and mid frequency levels between 90-91 dB(A) 5 feet from the fans.
Unger determined noise sources associated with this fan where the variable speed driven motors and the fan casings. Unger suggested a removable sound blanket wrap be installed on the fan housing and then a perimeter sound curtain system be installed.
The sound reduction was measured at 12 decibels thus achieving the customers acoustic goals well below 85 dBA.
