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.
  •  These are dependant upon:

    The airway width in relation to splitter width.
    The splitter absorption coefficient.
    The overall attenuator length.

  • 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.