FIELD: metrology.
SUBSTANCE: invention relates to metrology. In a metal casing with a removable front cover, the walls of which are lined with an inspected sound absorber, on the body bottom through an elastic damping gasket, an adjustable noise source is set, the adjustment being made by the loudness of the sound and the signal frequency using a signal power amplifier and an oscilloscope, and a microphone is fixed at the distance of 1 m from the case 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, and the Lp sound power level are determined from the results of measurements of the Lsp average sound pressure level on the measuring surface S, m2, for which the area of the hemisphere is accepted, 
, where S = 2πr2; r – distance from the source center to the measurement points; S0 = 1 m2, and the corrected sound power level LpA: 
, where LAcp – the average sound level on the measuring surface.
EFFECT: technical result is the expansion of technological possibilities for testing objects having several elastic connections with body parts.
1 cl, 4 dwg
