Noise Control - SONEX Circular Attenuators Series

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The Q-Tech high performance SONEX circular attenuators are the outcome of a testing and development program in our insertion loss test facility. Developed to provide high performances the SONEX range is designed for a number of applications. Their prime use is for connecting to fans, but they are also ideal for connecting to supply air grilles or being positioned anywhere throughout a system where attenuation is necessary to remove noise generated by equipment.

In all situations they provide a known and dependable insertion loss, giving security to design engineers looking for quality installations in often difficult to handle situations.


All units have been tested in accordance with BS4718:1971 for insertion loss. Air flow pressure loss data was obtained from tests conducted on a BS848: Part 1 1980 test rig. Pressure losses are little more than those which would occur over a comparable section of straight duct.


The attenuator consists of a perforated tubular liner manufactured from sheet steel. The liner is enclosed by a thick layer of mineral wool sound absorbing material. Casing and end plates are formed from galvanised sheet steel. Select the attenuator that is the size you require and provides the attenuation necessary. The model numbers shown provide the complete product specification.


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