FIELD: transport engineering.
SUBSTANCE: invention can be used to determine contribution of muffler into outside sound field of automobile. Maximum noise level is determined by carrying out series of measurements of automobile outside noise when automobile runs at acceleration along measured road section in different gears at left-hand and right-hand sides. Additional muffler is connected and measurements of noise corresponding to maximum level are carried out from side and in gear corresponding to maximum level. Contribution of muffler into outside noise field of automobile is determined by value of difference.
EFFECT: possibility of choice of rational method of reduction of automobile outside noise, reduced cost of acoustic finishing.
1 dwg
