FIELD: spectral analysis, diagnostics of mechanisms by acoustic signals of their components. SUBSTANCE: device includes electroacoustic converter, selective amplifier, control unit, analog-to-digital converter, on-line storage, spectral conversion unit, scaling unit, matrix comparator, recognition unit, storage of standards, storage of comparison criteria, unit storing values of classified indications and indicator of state of analyzed object. EFFECT: increased resolving power. 5 dwg
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