FIELD: physics.
SUBSTANCE: metal body is made with a removable front cover. Its walls are lined with the investigated sound absorber. The control noise source is fitted at the body bottom through the elastic-damping pad, the control of which is carried out on the sound volume and the signal frequency with the signal power amplifier and the oscilloscope. The microphone is mounted at the distance of 1m from the body lid, the sound pressure level signals of which are fed to the frequency spectrum analyzer and then to the computer for processing the received information.
EFFECT: expanding the technological capabilities of testing the sound absorbers by the stand researches with subsequent processing on the computer.
2 cl, 3 dwg
