FIELD: test equipment.
SUBSTANCE: invention relates to testing equipment. Stand for acoustical tests of sound absorbers contains the body with the removable front cover, the walls of which are lined with the inspected sound absorber, on the bottom of the body through the elastic damping gasket the adjustable noise source is installed, where the adjustment is carried out according to the loudness of the sound and the signal frequency using the signal strength amplifier and the oscilloscope, and the case a microphone is fixed at the distance of 1 m from the cover, the signals of sound pressure levels from which are fed to the spectrum analyzer, and then to the computer for processing the information received, while the sound power level Lp is determined from the results of measurements of the average sound pressure level Lcp on the measuring surface S, m2, for which the area of the hemisphere is accepted, where the sound-absorbing lining is made with the resonant inserts and contains the smooth and perforated surfaces, between which there is a layer of sound-absorbing material of complex shape, which is an alternation of continuous and hollow sections.
EFFECT: extended technological possibilities for testing objects, which have several elastic connections with the body parts.
1 cl, 5 dwg
