TY JOUR TI Calculation of Acoustic Efficiency of Exhaust Silencers for Automotive Internal Combustion Engines KW engine’s exhaust noise KW silencer KW insertion losses KW impedance for sound emission by hole KW end hole’s reflection coefficient modulus KW end hole’s attached length KW exhaust noise source internal impedance KW engine’s exhaust manifold KW manifold acoustics impedance JO Safety in Technosphere AU Tupov, V.V. AU Matasova, O.Y. PY 2020 IS 9 PB INFRA-M Academic Publishing LLC.