Fan Silencers

Heavy Duty Gaseous Fan Silencers

All of the gaseous flow silencers designed and manufactured by NVC Olsonfab are passive designs. They do not require any electrical or mechanical stimulation to function. They’re simply a static, trouble free means of attenuating noise by converting sound energy to miniscule quantities of heat. Passive designs generally provide broadband noise attenuation.

Active noise control devices, which usually consist of electronically controlled microprocessors, loud speakers, and microphones, are a method of reducing unwanted sound by the addition of a second sound specifically designed to cancel the source sound. Present designs are only effective for narrow band, low frequency sound generally below 250-300 Hz.

The broadband noise attenuation of the passive designs is generally always required for a practical cost effective solution.

Typical Applications in Plant and Environmental

Features & Benefits