Acoustic Louvres A complete range of certified, high performance acoustic louvres to solve a wide range of environmental noise pollution problems
IAC Acoustics Making the World a Quieter Place Founded on an unrivalled history of engineering with some of the most pioneering discoveries in the industry, the IAC Acoustics brand is synonymous with technological innovation. From controlling noise at a power station to tuning the sound in a TV or radio studio, IAC Acoustics has had a positive impact on society and helped to shape what can be achieved to make speech more intelligible, music more enjoyable, reduce the impact of industrial noise and protect people s sense of hearing. The continual success of our products and services over the decades has brought the brand a reputation for quality and reliability among customers, whether they are multinational corporations or independent family businesses. This is supported by the expertise and passion of our workforce, the people behind the products, including designers, engineers and industry specialists. To face the ever increasing noise reduction demands of the future, we will strive to further enhance our ability to reduce excessive noise. We aim to focus on developing tomorrow s solution today, innovating faster and delivering solutions that meet the requirements of the next generation. In doing so, we will stay true to our key values and founding philosophy to make the world a quieter place. 2
Page 4 Acoustic Louvres Overview 6 Acoustic Louvre Range 8 Product Features 1 Acoustic Louvre Installation 12 Acoustic Louvre Specifications 14 - Noishield Acoustic Louvre Model R 15 - Noishield Acoustic Louvre Model 2R 16 - Noishield Acoustic Louvre Model LP 17 - Noishield Acoustic Louvre Model 2LP 18 - Slimshield Acoustic Louvre SL-1 19 - Slimshield Acoustic Louvre SL-15 2 - Slimshield Acoustic Louvre SL-3 21 - Slimshield Acoustic Louvre SL-6 22 - Slimshield Acoustic Louvre SL-V3L 23 - Slimshield Acoustic Louvre SL-V3S 24 Acoustic Louvred Doors 26 Acoustic Louvres in Harsh Environments 27 Office Contacts 3
Acoustic Louvres Overview IAC Acoustics is a leading global manufacturer of rugged, high performance acoustic louvres and has completed thousands of installations worldwide. Applications include: Fresh air intakes for ventilation systems Mechanical equipment screens and penthouses Noise barriers Process air intakes Cooling tower inlets / exhausts and screens IAC can provide acoustic louvre solutions to combat environmental noise problems in mixed commercial / residential areas, carrying out all relevant noise surveys and acoustic analysis. IAC Acoustics curved (Noishield ) or linear (Slimshield ) blade louvre styles can be used to match the overall scale and aesthetics of a new building. 4
Form & Function Together Our acoustic louvred screens result in a high performance solution to unwanted levels of noise, without the need for additional architectural cladding. 5
Acoustic Louvre Range Noishield - Aerofoil blade Model R & Model LP: 35mm deep Model 2R & Model 2LP: 61mm deep Slimshield - Linear Blade SL-1: 1mm deep SL-15: 152mm deep SL-3: 3mm deep SL-6 (double banked): 6mm deep SL-V3L: 3mm deep SL-V3S: 3mm deep Noishield Louvres - Sound Octave Band Centre Frequency, Hz Louvre Depth (mm) 63 125 25 5 1k 2k 4k 8k Model R 35 5 7 11 12 13 14 12 9 Model 2R 61 6 12 15 21 24 27 25 2 Model LP 35 4 5 8 9 12 9 7 6 Model 2LP 61 5 8 12 16 22 18 15 14 Slimshield Louvres - Sound Octave Band Centre Frequency, Hz Louvre Depth (mm) 63 125 25 5 1k 2k 4k 8k SL-1 1 5 4 5 6 9 13 14 13 SL-15 15 6 6 8 1 14 18 16 15 SL-3 3 6 7 1 12 18 18 14 13 SL-6 6 7 9 12 24 31 33 29 3 SL-V3L 3-5 1 12 17 22 21 21 SL-V3S 3-7 13 13 18 21 2 21 6
Integrated or Standalone Our acoustic louvres can be used as standalone screens around mechanical plant, or integrated into walls and building façades. 7
Product Features Our acoustic louvres are multi-purpose, permitting air to flow, whilst shielding the environment from unwanted noise. Both IAC Acoustics Noishield and Slimshield louvres are available in an array of standard modular sizes, meaning that a wide range of performance requirements can be met. By using our range of acoustic louvres, it overcomes architectural consistency issues, especially where space is limited. Where access is required, both Noishield and Slimshield acoustic louvres can be supplied as doorsets, either for inclusion in louvred screens, or as standalone units. Noishield Special Features Suitable for use behind architectural louvres (1mm air space is required between faces) Bold, curved blade appearance A highly economical acoustic louvre system Slimshield Special Features Linear appearance Superior high frequency performance Finishes Available Galvanised mild steel Aluminium Stainless steel Polyester Power Coated (PPC) Vinyl coated steel Syntha Pulvin Other non-standard finishes are available upon request. 8
NOISHIELD SLIMSHIELD Rugged all-steel galvanised construction. Stainless steel, aluminium and other materials are also available Inert, vermin-proof, weather-rated non combustible acoustic fill FOR NOISHIELD Aerofoil shaped splitter blade for maximum noise reduction with minimum pressure drop FOR SLIMSHIELD Linear blade appearance for superior high frequency performance Perforated splitter underside for maximum sound absorption Weather stop inhibits rain/snow entry FOR NOISHIELD 35mm for the single banked system or 61mm deep for the double banked system FOR SLIMSHIELD 1, 152, 3mm deep single banked systems and 6mm deep for the double banked system Available in a variety of durable, attractive finishes, e.g. vinyl coated steel, polyester powder paint, mill finish aluminium, anodised aluminium, Syntha Pulvin, galvanised and stainless steel Modular sizes enable assembly of rectilinear louvre walls of almost any size Louvre blade orientation blocks horizontal line of site, enhancing both aesthetics and acoustic performance Bird guards are available in galvanised or stainless steel, insect screens can also be supplied 9
Acoustic Louvre Installation Typical details are shown below and certified dimension drawings are provided with each acoustic louvre. IAC Acoustics will supply all supporting steelwork if necessary. For large louvre banks, IAC Acoustics will provide installation drawings and a full installation service if required. Flush Exterior Concrete Inserts Flanged Exterior Caulk Louvre Louvre Louvre Exterior Caulk Exterior Caulk Exterior Caulk Flush Interior Caulk Masonry Anchors Exterior Masonry Strap Bolted Connections Mullion Louvre Louvre Louvre Exterior Grout with Mortar Exterior Caulk 1
Engineered for Performance Despite primarily being engineered as a high performance solution to attenuating unwanted noise, our acoustic louvres are a modular design, resulting in screens that are scalable to suit individual projects. 11
Acoustic Louvre Specifications Page 14 Noishield Acoustic Louvre Type R 15 Noishield Acoustic Louvre Type 2R 16 Noishield Acoustic Louvre Type LP 17 Noishield Acoustic Louvre Type 2LP 18 Slimshield Acoustic Louvre SL-1 19 Slimshield Acoustic Louvre SL-15 2 Slimshield Acoustic Louvre SL-3 21 Slimshield Acoustic Louvre SL-6 22 Slimshield Acoustic Louvre SL-V3L 23 Slimshield Acoustic Louvre SL-V3S 12
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www.iac-noisecontrol.com Noishield Acoustic Louvres Model R 19 15 76 Weight 4kg/m 2 Module Width 3-18mm H ±2 Standard Module Height 35-366mm (in 35mm increments) Intermediate heights are available 35 35 Ø12 Holes Typ. Both Sides Birdscreen Optional 1 = 2 = W ±1 Max. Width 122 35 Acoustic Performance Octave Band Centre Transmission Loss (db) Acoustic Rating 63 125 25 5 1k 2k 4k 8k 5 7 11 12 13 14 12 9 R w14db / D new21db For noise reduction, add 6dB to the above values 16 14 12 1 8 6 4 2 63 125 25 5 1k 2k 4k 8k Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) 1 2 3 4 5 6 7 8 9 1.98 1.39 1.71 1.95 2.18 2.39 2.6 2.75 2.93 3.1 25 2 15 1 Nominal Free Area 43%* * Average over louvre depth Cd.239 Acoustic Louvred Doors Single and double doors are available in the R louvre range See page 24 for further details 5 1 2 3 4 5 Errors and Omissions Excepted (E&OE). 14 www.iac-noisecontrol.com
www.iac-noisecontrol.com Noishield Acoustic Louvres Model 2R 61 19 15 76 uvre upplied in Halves olted gether Site 25 2 15 1 5 1 2 3 4 5 Weight Module Width 16 8kg/m 2 3-18mm 14 Standard Module Height 35-366mm (in 35mm increments) 12 Intermediate heights are available 1 W ±1 Max. Width 122 H ±2 8 6 4 2 35 1 35 Ø12 Holes Typ. Both Sides Birdscreen Optional 2 35 63 125 25 5 1k 2k 4k 8k Louvre Supplied in 2 Halves Bolted Together on Site 25 2 15 1 Acoustic Performance Octave Band Centre Transmission Loss (db) 5 Acoustic Rating 63 125 25 5 1k 2k 4k 8k 6 12 15 21 24 27 25 2 R w24db / D new31db For noise reduction, add 6dB to the above values 1 2 3 Static Pressure Transmission Drop Loss (N/m (db) 2 ) 3 25 25 2 2 15 15 1 5 5 63 125 25 5 1k 2k 4k 8k 1 2 3 4 5 25 2 Static Pressure 15 Drop (N/m 2 ) 5Nominal Free Area 25 2 15 1 Cd 1 2 3 4 5.17 5 Aerodynamic Performance 1 2 3 4 5 6 7 8 9 1 1 Face.7 1.7 1.21 1.39 1.55 1.68 1.79 1.89 2.1 2.13 Velocity (m/s) 43%* * Average over louvre depth Pressure Drop = ṁ/cd ṁ = mass flow Cd = Discharge Coefficient 1 2 3 4 14 25 12 2 1 8 15 6 1 4 2 5 63 125 25 5 1k 2k 4k 8k 1 2 3 25 25 2 2 15 15 1 1 5 5 63 125 25 5 1k 2k 4k 8k 1 2 3 Frequency 4 (Hz) 5 www.iac-noisecontrol.com Errors and Omissions Excepted (E&OE). 15
www.iac-noisecontrol.com Noishield Acoustic Louvres Model LP 216 15 12 Weight 35kg/m 2 Module Width 3-18mm H ±2 Standard Module Height 356-356mm (in 356mm increments) Intermediate heights are available 356 356 Ø12 Holes Typ. Both Sides Birdscreen Optional 151 356 = 2 = W ±1 35 Max. Width 122 Acoustic Performance Octave Band Centre Transmission Loss (db) Acoustic Rating 63 125 25 5 1k 2k 4k 8k 4 5 8 9 12 9 7 6 R w11db / D new18db For noise reduction, add 6dB to the above values 14 12 1 8 6 4 2 63 125 25 5 1k 2k 4k 8k Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area 1 2 3 4 5 6 7 8 9 1 1.23 1.73 2.11 2.46 2.74 3. 3.24 3.46 3.65 3.86 52%* * Average over louvre depth 25 2 15 1 5 Cd.3 1 2 3 4 5 Acoustic Louvred Doors Single and double doors are available in the LP louvre range See page 24 for further details Errors and Omissions Excepted (E&OE). 16 www.iac-noisecontrol.com
25 www.iac-noisecontrol.com 2 Noishield Acoustic Louvres 15 1 5 Static Pressure Transmission Drop (N/m Loss 2 (db) ) 3 25 25 2 2 15 15 1 5 5 61 Model 2LP 12 25 2 15 1 1 2 3 5 25 2 15 1 Acoustic Performance Octave Band Centre Transmission Loss (db) 5 Acoustic Rating 1 2 3 4 5 63 125 25 5 1k 2k 4k 8k 5 8 12 16 22 18 15 14 R w19db / D new25db For noise reduction, add 6dB to the above values 1 2 3 4 Weight 7kg/m 2 Module Width 3-18mm 14 Standard Module Height 25 12 356-356mm (in 356mm increments) Intermediate heights are available2 1 8 15 6 W ±1 Max. Width 122 H ±2 216 63 125 25 5 1k 2k 4k 8k 1 2 3 4 5 1 4 15 356 151 356 Ø12 Holes Typ. Both Sides 2 2 35 Birdscreen 5 Optional 63 125 25 5 1k 2k 4k 8k 1 2 3 25 25 2 2 15 15 1 1 5 5 Louvre Supplied in 2 Halves Bolted Together on Site 63 125 25 5 1k 2k 4k 8k 1 2 3 Frequency 4 (Hz) 5 Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area 1 2 3 4 5 6 7 8 9 1 1.7 1.41 1.73 1.98 2.21 2.46 2.62 2.77 2.99 3.12 52%* * Average over louvre depth 25 2 15 1 5 Cd.242 Pressure Drop = ṁ/cd ṁ = mass flow Cd = Discharge Coefficient 1 2 3 4 Errors and Omissions Excepted (E&OE). www.iac-noisecontrol.com 17
www.iac-noisecontrol.com Slimshield Acoustic Louvres SL-1 1 Weight 2kg/m 2 Module Width 3-18mm Standard Module Height 4mm minimum, (increasing increments of 23mm) Intermediate heights are available 23 Typ. Pitch 86 Airway Fixing Holes Optional Birdscreen Optional Varies Non-Standard Base Section 117 Blade Acoustic Performance Octave Band Centre Transmission Loss (db) Acoustic Rating 63 125 25 5 1k 2k 4k 8k 5 4 5 6 9 13 14 13 R w1db / D new16db For noise reduction, add 6dB to the above values 16 14 12 1 8 6 4 2 63 125 25 5 1k 2k 4k 8k Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area 1 2 3 4 5 6 7 8 9 1.92 1.3 1.59 1.84 2.5 2.25 2.43 2.61 2.76 2.9 42%* * Average over louvre depth 25 2 15 1 5 Cd.225 1 2 3 4 5 Acoustic Louvred Doors Single and double doors are available in the SL-1 louvre range See page 24 for further details Errors and Omissions Excepted (E&OE). 18 www.iac-noisecontrol.com
www.iac-noisecontrol.com Slimshield Acoustic Louvres SL-15 26 35 99 Typ. 26 Typ. Ø12 Holes Typ. Both Sides Weight 3kg/m 2 Module Width 3-18mm Standard Module Height 35mm minimum, (increasing increments of 35mm) Intermediate heights are available 35 Typ. Birdscreen Optional 152 Varies Non-Standard Base Section 76 152 Acoustic Performance Octave Band Centre Transmission Loss (db) 63 125 25 5 1k 2k 4k 8k 6 6 8 1 14 18 16 15 2 15 1 Acoustic Rating R w15db / D new21db 5 For noise reduction, add 6dB to the above values 63 125 25 5 1k 2k 4k 8k Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area 1 2 3 4 5 6 7 8 9 1.53.73.9 1.4 1.16 1.28 1.37 1.47 1.56 1.64 32%* * Average over louvre depth 2 25 2 15 1 5 Cd.127 Acoustic Louvred Doors Single and double doors are available in the SL-15 louvre range See page 24 for further details 25 1 2 3 Errors and Omissions Excepted (E&OE). www.iac-noisecontrol.com 19
25 www.iac-noisecontrol.com 2 Slimshield 15 Acoustic Louvres 1 5 1 2 3 4 5 16 14 12 1 8 6 4 2 1 1 Typ. Optional Birdscreen 2 Typ. 63 125 25 5 1k 2k 4k 8k SL-3 94.5 25 2 15 1 5 1 2 3 Weight 5kg/m 2 Module Width 3-18mm Standard Module Height 6mm minimum, (increasing increments of 2mm) Intermediate heights are available Varies 2 25 2 15 15 1 1 5 5 Non-Standard Base Section 2 Typ. 1 Typ. 5 2 3 Ø12 Holes Typ. Both Sides 63 125 25 5 1k 2k 4k 8k 1 2 3 4 5 25 2 Acoustic Performance Octave Band Centre 15 63 125 25 5 1k 2k 4k 8k Transmission Loss 1 (db) 6 7 1 12 18 18 14 13 5 Acoustic Rating R w17db / D new23db For noise reduction, add 6dB to the above values 1 2 3 4 5 2 25 15 2 15 1 1 5 5 63 125 25 5 1k 2k 4k 8k 1 2 3 25 Aerodynamic Performance 2Static Pressure 1 2 3 4 5 6 7 8 9 1 15Drop (N/m 2 ) Face 1.94 1.31 1.61 1.83 2.13 2.27 2.46 2.63 2.84 2.99 Velocity (m/s) 5Nominal Free Area 45%* * Average over louvre depth 4 25 35 3 2 25 15 2 15 1 1 55 Cd.233 1 2 3 4 63 125 25 5 1k 2k 4k 8k 1 2 3 Frequency 4 (Hz) 5 Acoustic Louvred Doors Single and double doors are available in the SL-3 louvre range See page 24 for further details 25 2 15 1 Errors and Omissions Excepted (E&OE). 2 5 1 2 3 4 www.iac-noisecontrol.com 2
www.iac-noisecontrol.com Slimshield Acoustic Louvres SL-6 Welded Standard Head Section Birdscreen Optional 1 94.5 Weight 1kg/m 2 Module Width 3-18mm Standard Module Height 6mm minimum, (increasing increments of 2mm) Intermediate heights are available 1 Typ. 2 Typ. 1 Typ. 5 2 2 5 2 Typ. Ø12 Holes Typ. Both Sides Varies Non-Standard Base Section 63 Acoustic Performance Octave Band Centre Transmission Loss (db) Acoustic Rating 63 125 25 5 1k 2k 4k 8k 7 9 12 24 31 33 29 3 R w26db / D new31db For noise reduction, add 6dB to the above values 4 35 3 25 2 15 1 5 63 125 25 5 1k 2k 4k 8k Aerodynamic Performance Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area 1 2 3 4 5 6 7 8 9 1.68.94 1.15 1.3 1.47 1.61 1.77 1.89 2.2 2.13 45%* * Average over louvre depth 25 2 15 1 5 Cd.161 Pressure Drop = ṁ/cd ṁ = mass flow Cd = Discharge Coefficient 1 2 3 4 Errors and Omissions Excepted (E&OE). www.iac-noisecontrol.com 21
www.iac-noisecontrol.com Slimshield Acoustic Louvres SL-V3L 3.4 Overall 2 Centres 111 18 28 Ø12 Holes Typ. Both Sides Birdscreen Optional Weight 5kg/m 2 Module Width 3-18mm Standard Module Height 6mm minimum, (increasing increments of 23mm) Intermediate heights are available 314 86 117 Ø12mm Hole (Typ. ) Optional Birdguard Acoustic Performance Octave Band Centre Transmission Loss (db) 63 125 25 5 1k 2k 4k 8k - 5 1 12 17 22 21 21 25 2 15 1 Acoustic Rating R w18db / D new26db For noise reduction, add 6dB to the above values Aerodynamic Performance 5 63 125 25 5 1k 2k 4k 8k Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area Aerodynamic Coefficient 1 2 3 4 5 6 7 8 9 1-1.95 2.39 2.76 3.9 3.39 3.66 3.91 4.15-42%* * Average over louvre depth (k) 8.7 125 1 75 5 25 1 1 7 5 Discharge Coefficient.34 1 2 3 4 Errors and Omissions Excepted (E&OE). 22 www.iac-noisecontrol.com 22
www.iac-noisecontrol.com Slimshield Acoustic Louvres SL-V3S 3.4 Overall Optional Birdscreen 2 Centres 1 1 Typ. 26 2 Typ. 1 Typ. 2 Typ. 94.5 211 Ø12 Holes Typ. Both Sides Weight 55kg/m 2 Module Width 3-18mm Standard Module Height 6mm minimum, (increasing increments of 35mm) Intermediate heights are available 99 TYP. 26 Typ. Ø12mm Hole (Typ.) Optional Birdguard Varies Non-Standard Base Section 5 2 3 Acoustic Performance Octave Band Centre Transmission Loss (db) 63 125 25 5 1k 2k 4k 8k - 7 13 13 18 21 2 21 314 25 2 15 1 111 86 28 3.4 Overall 2 Centres 18 Acoustic Rating R w18db / D new29db For noise reduction, add 6dB to the above values Aerodynamic Performance 5 117 Ø12mm Hole (Typ. ) 63 125 25 5 1k 2k Optional 4k 8k Birdguard Static Pressure Drop (N/m 2 ) Face Velocity (m/s) Nominal Free Area Aerodynamic Coefficient 125 1 2 3 4 5 6 7 8 9 1 1-1.45 1.78 2.6 2.3 2.52 2.72 2.91 3.9-75 32% 5 *Average over louvre depth 25 (k) 15.8 125 1 75 5 25 Discharge Coefficient 1 2.252 3 4 Pressure Drop = ṁ/cd ṁ = mass flow Cd = Discharge Coefficient 1 2 3 4 Errors and Omissions Excepted (E&OE). www.iac-noisecontrol.com 23
Acoustic Louvred Doors Single and double doors are available in the entire IAC Acoustics louvre range The structural minimum is 85mm and is available up to 125 x 295mm high as standard for a single door and 25 x 295mm high for a double door. Other widths and heights are available on request All doors are supplied with a union oval lock, latch and pull handle Acoustic louvred doors can be fitted with bird guards and insect meshes on request Doors can be polyester powder coated to match adjoining louvres Materials for the door and door frame include galvanised steel, stainless steel and aluminium 24
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A Quality Solution All IAC products are designed to stand the test of time and manufactured to suit the application. From offshore environments to extremes in weather and ambient temperature, IAC Acoustics can produce a highly engineered solution to your noise control issue. Harsh Environments 26 In addition to providing acoustic louvres located in everyday environments, IAC also has the ability to modify products to suit more demanding applications.
Contacts Head Office - Winchester, UK T: +44 () 1962 873 E: info@iacl-uk.com Australia T: +61 () 2 8781 4 F: +61 () 2 9725 2939 E: info@iac-australia.com.au China (Dongguan Office) T: +86 () 769 89899966 82 F: +86 () 769 89899966 81 E: china.sales@iac-china.com Italy T: +39 445 575 669 F: +39 445 575 2 E: italy.info@iac-noisecontrol.com Kuwait T: +965 2294 2 E: kuwait.info@iac-noisecontrol.com United Arab Emirates T: +971 () 4451 7877 E: uae.info@iac-noisecontrol.com China (SH Office) T: +86 () 21 68825328 E: test@iac-china.com Denmark T: +45 36 77 88 F: +45 36 78 12 3 E: mail@iac-nordic.dk Germany T: +49 () 2163 9991 F: +49 () 2163 9991 23 E: deutschland@iac-gmbh.de Ireland T: +353 1 282 843 F: +353 1 282 8427 E: ireland.info@iac-noisecontrol.com Israel T: +972 894 284 83 F: +972 894 284 86 E: hna.info@iac-noisecontrol.com 27
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