Placid Instruments BV

PLACID Impedance Tubes Sound Absorption Sound Transmission Loss - Datasheet

Impedance Tube, Kundt’s Tube, Sound Absorption And Transmission Loss PLACID SL-02 Soundlevel Meter, Class 2 IEC 61672-1:2002 Sound Calibrator. The impedance tube (also know as Kundt Tube) measurement obtains the normal incidence absorption coefficient of a layer of textiles with a small diameter (usually less than 10 cm).