IAC - Optimized Power-Flow Acoustic Silencers

Forward and Reverse Flow

In 1972, IAC developed silencer Dynamic Insertion Loss and Self-Noise ratings both under FORWARD FLOW (+) and REVERSE FLOW (-) conditions for Rectangular and Cylindrical Duct Attenuators. Since attenuation values are generally higher in the first five octave bands in the Reverse Flow (-) mode compared to the Forward Flow (+) mode, more economical silencer selections can often be made on return air systems. These phenomena are illustrated below.

• Power-Flow Silencers meet the highest standards for heavy-duty air and gas handling systems.
• Field-tested in thousands of installations for reliable, long-term noise control.
• Available in modular rectangular or tubular designs, tailored to solve noise challenges in any heavy-duty flow system.
• Each design is rigorously tested and validated by NVLAP-accredited independent facilities.
• Backed by ongoing R&D, IAC continually enhances and customizes silencers to meet evolving industry-specific requirements.

• Power Plants
• Gas Turbines
• Test Facilities
• Cooling Towers
• Steel Mills
• Wind Tunnels