SW series Impedance Tubes can accurately measure sound absorption coefficients and impedance according to standards described in ISO10534-2 (1998). They are based on the Transfer Function Method, which is much faster than the commonly used Standing Wave Ratio Method.

The SW series Impedance Tubes are specially designed not only to work with the cut samples, but also for direct use in the field. The small size and durable aluminum construction make it easy to transport and be used for estimating the properties of walls, ceilings, installed building materials, road surfaces, different ground surfaces, interiors of vehicles, etc.

BSWA offers the complete set of Impedance Tube system, which includes: the tubes, microphones; DAQ hardware and measurement software.

Technical Parameters:
Value to be Measured Sound Absorption Coefficient (α)
Standard GB/T-18696, 2-2002, ISO10534-2, 1998
Frequency Range (Hz) 63 ~ 1800
Inner Diameter of Testing Tube 100mm
Loud speaker 4 “ in diameter, 20 Watts, 8 Ohm
1/4’’ Microphone MPA416
Data Acquisition Card MC3022+PA50 or MC3622
Power Amplifier PA50
Software VA-Lab2 Basic + VA-Lab2 IMP-A

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