An Analysis on the Impact of Noise Outside the Vehicles Fuelled by New Energy
Noise samples were collected outside the vehicles equipped by internal combustion engine and fuelled by new energy,respectively,through field measurements to compare each other at different speeds.It was found that the pass-through constantly running noise of new energy fuelled vehicles was 1.0～1.7 dB(A)lower than that of gasoline fuelled ones at either a low speed of 30 km/h or a high speed of 60 km/h.Based on the principle of sound energy superposition and one-hour equivalent continuous A-weighted sound pressure level combined with the road traffic flow,a simulation software Cadna/A was applied to predicting the sound levels in a specified urban area,whilst studying the impact of various proportion of new energy fuelled vehicles on the areal acoustic environment.When the share of new energy fuelled vehicles was increased up to 100％,the noise at observation points dropped by 0.8～1.6dB(A)during daytime and 0.5～0.9dB(A)at night.In view of such non-significant effect on the improvement of overall acoustic environment by elevating the proportion of new energy fuelled vehicles,the development of low-noise road surface is suggested to help to make the areal acoustic environment better.
AcousticsTraffic noiseSound energy superpositionNew energy fuelled vehiclesPass-through noise
NETL
NSTL
万方数据
