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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.
Main specifications of the Impedance Tubes:
SW 230: Sound Absorption 125 - 3150 Hz
SW 260: Sound Absorption 125 - 6300 Hz
SW 420: Sound Absorption 63 - 1800 Hz
SW 470: Sound Absroption 800 - 6300 Hz
SW 422: Sound Absorption 63 - 1800 + Sound Transmission loss
SW 477: Sound Absroption 800 - 6300 + Sound Transmission loss
All Impedance Tubes comply with Sound Absorption Standard GB/T-18696, IS) 10534-2, 1998 and Transmission Loss (TL) Standard in discussion.