NRC, SAA & STC diffuse-field testing service
Evaluate how your product absorbs and blocks sound under realistic diffuse-field conditions. Mecanum measures NRC and SAA from the third-octave absorption curve, and STC from the transmission loss spectrum, all under diffuse-field conditions that capture the full acoustic behavior of your material. These ratings give you a clear benchmark to compare materials and guide both design and compliance decisions, whether you’re developing insulation panels, automotive parts, or construction systems.
Absorption (NRC, SAA): ASTM C423, ISO 11654, SAE J2883
Transmission loss (STC): ASTM E2249, ISO 15186-1, SAE J1400, SAE J2846
Small acoustic test cabin (alpha cabin)
Compact, cost-effective for smaller samples, ideal for prototyping and R&D, well suited to automotive, covering 250 Hz to 10 kHz.
Large chamber
Full ISO and ASTM compliance, suited to large-format samples, highly accurate, with longer lead times and higher budgets.
Step 1: Tell us your materials
and your target ratings
Step 2: We recommend the environment
large chamber or small acoustic test cabin
Step 3: Send us your samples
with our handling guidance
Step 4: We measure
under diffuse-field conditions
Step 5: You receive a full reporting
including certification-ready ratings and curves
Coming soon.
Automotive industry
Measure the NRC, SAA, and STC of cabin trim, headliners, and sound packages to hit interior noise targets during development.
Aerospace industry
Rate the absorption and transmission loss of lightweight cabin and insulation materials against weight-critical acoustic targets.
Material manufacturers
Get certified NRC, SAA, and STC ratings for your products, ready for datasheets and customer specifications.
Building
Measure the NRC, SAA, and STC of insulation panels, partitions, ceilings, and floor systems to guide design and support code compliance.
Laboratories
Complement your own testing with standards-compliant NRC, SAA, and STC ratings and their underlying curves.
Universities
Access diffuse-field absorption and transmission testing to standards without operating a full chamber in-house.