Cross-Talk Attenuators

A comprehensive range of attenuators has been developed to cater for the diverse range of constructional and performance specifications required for the mechanical services industry. The attenuator acoustic design is governed by various parameters including source noise level, system losses, distances, noise criteria, etc. We are very aware of the importance of assessing the most economic unit to meet the noise criteria whilst considering the practicalities of the ductwork system. In order to optimise the design, Sound Planning uses HVAC software to analyse the system requirements and design appropriate attenuators. To allow the benefits of this technology to be used by consulting engineers and contractors a noise control engineer should attend your offices and go through the project requirements. From the information obtained and discussions with yourselves we can produce comprehensive schedules and technical reports detailing the attenuator selections. . Due to the diverse range of projects undertaken, attenuator construction includes a wide range of options to cater for different specification requirements. The Circular Silencer range are typically used in ductwork systems where they can be duct mounted or bolted directly on to the fan if size allows. Depending on the acoustic requirements circular attenuators can incorporate a central 'pod' that will increase the acoustic performance in terms of insertion loss. Attenuators without a pod will offer an acoustic performance at minimal resistance to the airflow. Another problem which may occur in a ductwork system is 'cross-talk' (an acoustic weak link between two areas and can result in a lack of privacy); Cross-Talk Attenuators are selected using our calculation software, determining the necessary insertion losses, whilst maintaining low system pressure drops (a pre-requisite at this point in the system). Cross-Talk Attenuators can be of rectangular or circular construction. All attenuator units have been tested in accordance with the British Standard BS4718:1971 "Methods of tests for silencers for air distribution systems" . OPTIONS: Attenuator end connections: ?Rolled steel angle flanges (rectangular). ?Slide on Doby type flanges (rectangular). ?Spigot ends (both). ?End flanges that incorporate threaded inserts (circular). Splitter orientation: ?Vertically mounted splitters (rectangular). ?Horizontally mounted splitters (rectangular). ?Central pod kit (circular). Pressure ratings: ?DW144 class B leakage and up to 1000 Pascal's positive pressure or 750 Pascal's negative pressure. ?DW144 class D leakage and up to 2500 Pascal's positive pressure or 750 Pascal's negative pressure. Other: ?Acoustic media wrapped in melinex. Typically used in systems where grease and/or high moisture levels occur and hospital/clean room applications. ?Wrapping of the attenuator ends with polythene to prevent the ingress of rubble on site. Attenuators with special requirements such as: ?Paint finishes. ?Stainless steel construction. ?Heavy gauge steel construction . ?Welded construction. ?Special flange requirements. ?Plastic construction. ?Plenum sections.

For more information on Cross-Talk Attenuators talk to Sound Planning Ltd