IAC Noise and Acoustic Control Products

IAC's commitment to research and development was established over fifty years ago and remains as strong as ever today. Many noise control products and acoustic structures now in widespread use began life as prototypes in IAC's aero-acoustic test centre and IAC is still one of a small number of companies, worldwide, to have its own NVLAP-accredited research and development facilities. Among many product 'firsts' developed in IAC's laboratory are air-cooled jet engine test facilities, ultra-quiet audiometric (hearing testing) rooms, modular broadcasting studios, ceiling/wall absorption panels, acoustic doors, high-performance moveable wall systems, dynamically-rated ventilation silencers and metal-faced anechoic wedges.

(1) Removable hatch in roof for testing silencers up to 3 metres x 3 metres in cross section
(2) 42,500m³/hr vane-axial fan
(3) Systemic silencer
(4) Plenum with loud speaker and flow diffuser
(5) Test unit pitot tube ports
(6) Super Noise-Lock acoustic housing
(7) Test silencer
(8) 300m³ reverberation receiving room
(9) 85m³ reverberation source room
(10) 75mm impedance tube
(11) 600mm x 600mm anechoic wedge impedance tunnel
(12) 4.3m x 2.7m test frame for transmission loss tests

Model testing of a new type of IAC aircraft ground run-up pen

Full mock-up testing of a Quiet-Flow roof-top air handling unit (AHU)

Noise emissions from on-floor air handling units are measured in a mock-up office space next to the unit under test

A Clean-Flow acoustic ceiling panel is subjected to high-pressure washing

A Noise-Lock ceiling module is prepared for acoustic testing

All new types of Quiet-Duct ventilation silencers are dynamically tested in IAC's laboratory

New or unusual designs of Noise-Lock acoustic doors - and new types of door furniture - undergo rigorous testing to ensure correct alignment, fit and ease of operation

IAC has a major (200m²/2150ft²), fully equipped Acoustics Laboratory in Lille, France. Used extensively for product development and testing, it comprises:

• Anechoic Chamber
• Reverberation Room
• Impedance (Kundt) Tubes

Further information about these facilities can be obtained from:

Jean Pierre Dussart
IAC SIM Engineering SA
Tel: +33 (0) 3 20 05 88 55
Website: www.sim-engineering.com

The acoustic performance of ALL IAC products and structures is thoroughly tested and recorded in our laboratory, and in the field, so you can have complete confidence in our published data and be sure that
our products will meet the required specification.

All IAC products and structures are tested in accordance and compliance with relevant international test standards - such as ISO and ASTM - to ensure that test data is accurate and meaningful.

IAC's laboratories aren't used solely for the development of mainstream product lines. We spend just as much time tackling the special, often unique acoustic problems of our customers and our laboratory is often crucial in developing a solution that is both technically and commercially viable.

Having proper research facilities within our business means that we can create and test prototype products quickly and efficiently, without having to rely on outside agencies. This is especially true with the adaption of certain existing products - within hours of manufacture they can undergo testing to have their performance verified.

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 programme, ensuring that performance data is consistently accurate.