Importance of transmission loss data
Transmission loss (TL) indicates how well a material or assembly blocks sound. It is critical for walls, doors, windows and enclosures. TL is typically expressed as the sound reduction index (Rw) in ISO standards or Sound Transmission Cl
Our services
- ISO 10140 / ASTM E90 testing: Determine the TL of partitions, panels and systems. Measurements are made in two decoupled reverberation rooms with a known source and receiving room arrangement.
- Spectrum correction: Provide C and Ctr adjustments for design according to ISO 717 and spectrum adaptation terms for ASTM.
- Consultation: Assistance in improving TL through changes in material thickness, mass, damping or sealing.
Regional coverage
We accept test specimens from across Southeast Asia. Lead times depend on sample size and test configuration.
Get started
Contact us to discuss your transmission loss testing requirements. We’ll advise on sample sizes, test configuration and scheduling.
