Impedance tube testing
Traceable — not in accredited scope
Small samples, fast turnaround, low cost. This is the right tool for material development, because you can iterate ten formulations for the price of one reverberation room test.
Tube configurations
- 100 mm tube
- Provided with your quotation
- 30 mm tube
- Provided with your quotation
- 16 mm tube
- Provided with your quotation
- Sample form
- Cut discs matching the tube diameter, minimum 3 per configuration
- Reported quantities
- α at normal incidence, normalised impedance, TL (ASTM E2611)
Impedance tube is not a substitute for ISO 354
Normal-incidence absorption from a tube is not the same quantity as random-incidence absorption from a reverberation room, and converting between them is unreliable. Use the tube to develop and compare; use the room to certify and publish. Any laboratory that tells you otherwise is saving itself work.