%0 Journal Article %T Analysis of frequency spectrum of outboard motor Hangkai 4.0 noise when nosing %A Pokusaev, M.. %A Khmelnitsky, K.. %K noise insulation, outboard boat motors, small vessels, marine power plants, nosing %J Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies %D 2020 %N %P 6 %I Astrakhan State Technical University