FIELD: acoustics, radio engineering. SUBSTANCE: method of determination of band level of noise within summary noise is based on separate reception of signals of noise of source and summary noise and on filtering of each of them within selected band of frequencies. Signals of noise of source and of summary noise are reduced to scale of time of signal of noise of source. Spectral analysis of both received signals is performed. Relationship between level of noise of source and level of spectral component of carrier frequency formed in process of reduction of time scale by finding effective coefficient of modulation of m signal on formed carrier frequency is determined. Level of spectral component on carrier frequency Ucn within spectrum of summary noise is measured and band level of noise Un of source within summary noise is determined in compliance with formula U
