Why test acoustic materials?
Acoustic panels, insulation and barrier materials are specified based on their ability to attenuate or absorb sound. Transmission loss and absorption coefficients must be measured under controlled conditions to ensure materials perform as expected. Accurate data helps architects, engineers and manufacturers design better acoustic environments.
Our testing facilities
ALT operates two decoupled reverberation rooms for measuring sound transmission loss and absorption, as well as an anechoic chamber and an impedance tube. Tests are conducted in accordance with ISO 354 (reverberation‑room absorption), ISO 10140/ASTM E90 (transmission loss) and ASTM E1050/ISO 10534‑2 (impedance tube). Services include:
- Transmission loss testing: Determine the sound reduction index (Rw or STC) of panels, doors, partitions and building materials. Results can be reported in both ISO and ASTM formats for international projects.
- Sound absorption testing: Measure the absorption coefficient of materials in a reverberation room (large samples) or impedance tube (small samples). Suitable for foam, fabrics, perforated panels and composite materials.
- Airflow resistance and acoustic impedance: Additional tests to characterise porous materials.
Coverage and reporting
Clients from across Thailand, Vietnam, Malaysia, Singapore, Philippines and Myanmar can send materials for testing. We provide detailed test reports with graphs, tabulated data and compliance notes.
Get started
Contact us to discuss your acoustic material testing requirements. We’ll advise on sample preparation, shipping instructions and scheduling.
