Acoustic Louvre
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| Brochure | Specification | Details for manufacture |
Introduction
Acoustic louvres are designed to provide a dual function of natural ventilation combined with effective sound reduction characteristics. The unit has been tested at Salford University's Department of Applied Acoustics. Their facilities, which are featured below are considered to be the finest and most up-to-date in Europe.
Application
The louvre is suitable for situations where there is a need for noise control combined with a need for effective ventilation, such as plant rooms, boiler houses, chemical, pharmaceutical, woodworking, oil, steel, power generation and general manufacturing industries.Designed as an effective means of reducing sound transmittance whilst allowing weathered ventilation, the louvre is suitable for vertical mounting into sidewall cladding or brickwork and may be installed as single modular units, or in horizontal runs &/or in vertical tiers.
Each louvre blade incorporates sound absorption material which is contained within a double layer of perforated mesh and gives a sound reduction of 20.4(dB) on an octave band centre frequency of 2kHz.
The units are simple to install and maintain and may be used in conjunction with roof ventilators to provide an overall system of natural and/or fire ventilation. The louvres are made-to-measure and offered in a variety of materials to meet specific requirements.
Design Features
The louvre blade configuration has been specifically designed, evaluated and tested by Salford University's Faculty of Applied Acoustics and Department of Aeronautical and Mechanical Engineering to provide, within a single unit, an effective means of sound reduction combined with good airflow characteristics.Materials
Louvre Blade Casing
Offered in a choice of aluminium or steel, either in mill finish or post coated. Also available manufactured using pre-coated materials.
Aluminium units in aluminium alloy to BS EN 485 supplied in either mill finish or with a polyester powder paint finish (including Syntha Pulvin) with a wide choice of colours and gloss levels.
Steel units manufactured using galvanised steel in mill finish or with a polyester powder paint finish (including Syntha Pulvin).
Pre-coated units manufactured using Plastisol, PVDf or Colorcoat coated substrates in a full range of colours.
Acoustic Infill Each louvre blade incorporates sound absorbing, fire retardant, inert mineral wool, which is vermin and bacteria proof.
Mesh The sound absorption material is contained within 2 layers of self extinguishing fire retardant nylon mesh: Inner layer 2mm diamond, black; outer layer 6mm diamond, black, or expanded aluminium mesh mounted to the rear of the louvre blade.
Product Testing
The unit has been tested at Salford University's Department of Applied Acoustics. Their facilities, which are featured below are considered to be the finest and most up-to-date in Europe.
The unit has undergone successful testing at Salford University's Department of Applied Acoustics, Test Report No. AT/88/11, and also at their Department of Aeronautical and Mechanical Engineering.
Acoustic Testing
The unit was subjected to a series of controlled sound transmission tests, following the procedure detailed in BS2750: Part 3: 1980, 'Recommendations for Field and Laboratory Measurements of Airborne Sound Transmissions in Buildings'.Aerodynamic
The unit was subjected to a series of independently controlled tests to determine the aerodynamic performance of the design. Aerodynamic Co-efficient - 0.278.Options
- Top, bottom and side flanges may be formed to whatever mounting detail is required. For additional information please consult the separate form entitled Details Required for Manufacture.
- With flanged louvres, the box depth can be manufactured to fit inside or outside the building line as required.
- Where units are to be mounted in continuous horizontal runs, joining plates are supplied for weathering.
- Nylon mesh or expanded aluminium mesh bird guards can be fitted internally if required.
