Industrial fan inlet silencers are part of an intake fan system and are designed to attenuate noise from the fan inlet. Air filters, inlet boxes, screens, and dampers may be included as part of the complete package. Silencer may be mounted on the fan or blower inlet or on a supply air duct or along a wall. Silencer may be tubular shaped and identified as a circular or round silencer as determined by the inlet flange geometry. Low-pressure loss through the silencer is the design goal and important to keep the fan horsepower requirement as low as possible. Final silencer selection is determined on airflow and sound levels required along with airstream/environmental air constituents a consideration.
Inlet fan silencers are manufactured in many configurations and materials to meet attenuation requirements. Collected data along with space envelope and required noise levels need to be firmly established before the silencer is successfully designed for an application.