Rectangular Attenuator
Attenuators basically consist of an arrangement of duct mounted absorbent splitters arranged with air-flow passages between them.
Attenuation is achieved by reflection, impedance and absorption.
At the entry to and the exit from an attenuator a resistance to airflow is created. The entry loss and the internal frictional losses are normally considerably less than the discharge loss.
The Sargents range of rectangular attenuators is designed to reduce plant noise in air conditioning and ventilation systems.
A range of eight standard models in lengths from 600mm to 3m enables an infinite flexibility of size and performance to be offered.
These are dependant upon:
→The airway width in relation to splitter width.
→The splitter absorption coefficient.
→The overall attenuator length.