机动车不同速度下外噪声变化与衰减关系研究

通过在机动车测试场进行单辆机动车行驶状况的实验,研究机动车车型大小、行驶速度快慢与噪声量大小的关系,同时研究不同距离下机动车行驶外噪声的衰减规律。数据结果显示,测试条件下,噪声量随着速度提升而增加,呈线性关系或对数关系;相同速度下,大型车的噪声量比小型车的高8.1～11.0dB;在一定距离范围内,距离每增加3.5m,机动车噪声量将衰减2.2～3.0dB。

The Study of the Vehicle External Noise at Different Constant Speed and Its Attenuation Relationship

This paper uses studies the links between the external noise of a vehicle and its constant speed, while considers the size of the vehicle as an important factor. It also studies the regularity of the external noise attenuation. The result shows that, under the experiment condition, the external noise of the vehicle will rise with its increasing speed, which is relevant with linear regression or Logistic regression; with the same speed, the external noise of large vehicles is 81~11.0dB higher than those of smaller vehicles; Within certain distance, the external noise reduces 2.2~3.0dB every 3.5m.