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Company Profile
 I am proud of the excellent reputation
the Industrial Acoustics Company has
built since we began over 50 years ago.
This Profile shows the depth of our design
and manufacturing experience, our
technical capability and our commitment
to high standards that are, I believe,
second-to-none.
Brian Quarendon, IAC Group President
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IAC Group of Companies
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| IAC America Inc (USA) |
| IAC Limited (UK) |
| IAC Nordic A/S (Denmark) |
| IAC Boet Stopson SAS (France) |
| IAC Sim Engineering & Soft SAS (France) |
| IAC GmbH (Germany) |
| IAC Stopson Italiana SpA (Italy) |
| IAC Stopson Espanoloa, SA (Spain) |
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Organization and Background
Founded in 1949, IAC has become the world’s largest provider of noise and acoustic control products, structures and test facilities.
Employing over 500 people in the IAC Group, IAC’s large and diverse product range includes everything from multi-engine test cells and hush houses to TV and radio studios, audiology rooms, enclosures for noisy machinery, road barriers, anechoic test rooms, acoustic doors and windows, air handling units (AHUs), air conditioning and power plant silencers and intake/exhaust systems for warships and luxury ferries. IAC even supplies rooms to schools for music practice and to the police for interviewing crime suspects.
IAC is an experienced and enthusiastic exporter, supplying equipment to over 50 countries throughout the Americas, Europe, Africa, the Middle East and Pacific Rim, with manufacturing plants on four separate sites in the USA, UK, France and Denmark. IAC’s Global Headquarters are located in Winchester, UK, approximately 100km (70 miles) from London.
In addition to the facilities directly operated by the company, IAC has manufacturing partners in low-labor-cost countries in Eastern Europe and China. IAC also has a large network of technical sales engineers, agents and distributors, offering advice and assistance to customers around the world. Several of these manufacture IAC products under license.
Products and Marketing
IAC offers imaginative solutions to an extraordinarily wide range of noise pollution and sound quality problems.
- Manufacturing and Process Industries
Silencers, Acoustic Enclosures and Barriers, custom-built in most instances for manufacturing/process industries to meet occupational Noise At Work regulations within the USA and EU.
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- Architectural
High privacy movable Acoustic Walls and Acoustic Doors for Convention Centers, hotels and offices, Educational Study Rooms, Music Practice and Recording Rooms for institutions, schools and universities. Acoustic Ceilings, providing high transmission loss and absorption characteristics.
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- Studios
Modular Studios for Radio, TV, Video, Post Production and Recording guaranteed to perform to exacting acoustic specifications - turnkey supply includes all acoustic walls, floors, roofs, windows and doors, silenced air conditioning, lighting, carpeting and full decoration.
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- Medical Life Sciences
Environmental structures for audiological and psycho-physiological examination and research, ranging from auscultation units, animal chambers and ‘Mini-Booth’ Audiometric Testing Rooms to multi-room speech and hearing complexes.
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- Building Services
Quiet DUCT Silencers, Conic FLOW Silencers and Quiet FLOW Plenums for control of noise from Air Conditioning Systems - Quiet VENT Silencers for conversational privacy, Cooling Tower Silencers and Equipment Room Noishield Louvres for neighborhood noise control. Also, customized, pre-commissioned, low-noise Air Handing Units (AHUs) for fast-track construction projects.
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- Research and Development Laboratories
Modular Soundproof Rooms, Anechoic and Reverberant Chambers, for product testing and development, scientific and medical research.
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- Construction Equipment
Noise Control Systems for portable air compressors, diesel generator sets, pneumatic drills and other applications to meet requirements of the Control of Pollution Act or other local legislation.
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- Noise Control for Gas Turbine Engine Applications
Turnkey noise-controlled and air filtration packages for high technology shipboard and land-based gas turbine engines Complete systems for the Utilities, Chemical and Oil Industries incorporating Power-Flow Silencers and Modular Acoustic Enclosures for Gas Turbine and Diesel Engine operation power plants, Off-Shore platforms, pipelines, compressors, transformers, blowdown valves, etc.
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- Jet Engine Test Cells and Aircraft run-Up Silencers
Design, manufacture and installation of aero engine test facilities and noise suppression systems for military and commercial aircraft including tailored support packages for fixed and rotary wing aircraft engines. IAC also offers facility refurbishments as an upgrade specialist.
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Engineering and Manufacturing Capability
IAC has manufacturing facilities of over 21,400m² (230,000ft²) in four countries, ie., Winchester, UK, New York, USA, Lille, France and Copenhagen, Denmark.
IAC maintains a Quality Management System in conformance with BS EN ISO 9001:2000, Lloyds® accreditation certification number 932300.
In addition, the company complies with the quality standards of government agencies such as UK Ministry of Defense, USAF, US Navy, NATO, The Canadian Airforce, The Canadian Navy, Royal Kuwait Airforce and the Royal Netherlands Navy.

Research Facilities
IAC's commitment to research and development was established over fifty years ago and remains as strong as ever today. IAC's laboratories are not used exclusively for new product development. The periodic, on-going testing of existing products is a vital part of our quality control program, ensuring that performance data is consistently accurate.
IAC has two modern, purpose-built Acoustic Research and Development Centers based at IAC America in New York, USA, and at IAC SIM Engineering SA in Lille, France.
The fully equipped Acoustic Laboratory in Lille, France comprises of an Anechoic Chamber, Reverberation Room and Impedance (Kundt) Tubes, and has the expertise and skills to perform acoustic and vibration diagnosis.
The Aero-acoustic laboratory in New York, USA contains several test facilities designed for dynamic and static testing that include:
- Two reverberation rooms for sound transmission loss and sound absorption testing.
- A wind tunnel for dynamic testing of silencers including insertion loss and self noise.
- An impedance tunnel used to determine the sound absorption co-efficients of Anechoic Room fiberglass and foam wedges.
- Full-scale Air Handling Unit Test Facility
IAC is a Sponsor
member of the following professional body:

UK Institute
of Acoustics
IAC is also a member of the following Associations:
Registered Office
IAC House, Moorside Road, Winchester, Hampshire SO23 7US. Registered in England No: 606877
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