FIELD: test technology. SUBSTANCE: device has frequency sweep unit 1, generator 2, amplitude regulator 3, power amplifier 4, vibration-testing machine 5 with object 6 to be tested mounted on, vibration transducers 7,8, matching amplifiers 9,10, indicator 11, converter 12, frequency-to-voltage converter 13, first and second units 14 and 15, pulse shapers 18 and 19, sweep control unit 20, first and second sense-responsive elements 21,22 OR gate 23, flip-flop 24, PRESET input 25, first and second delay elements 26,27, adder 28, first, second, third switches 29,30,31, first and second peak detectors 32,33, unit 34 for determining modulus, threshold element 35, first and second AND gates 36,37, null-device 38. EFFECT: enhanced efficiency due to simplified algorithm for determining resonance frequencies. 3 dwg
