基于赛宾原理的车内平均吸声系数现场测量

为有效测量内饰材料在实际汽车中的平均吸声系数，准确评价分析车内声学性能，提出基于赛宾原理的车内平均吸声系数现场测量方法以及详细的测量计算流程。针对某轿车的测量试验结果表明：该方法有效可行；1 250 Hz以上频段，该轿车的车内平均吸声系数基本保持稳定，约为0.33。研究结果为车内平均吸声系数的现场测量提供有效方法，为轿车内饰声学性能的评价分析提供依据。

In-situ Measurement of Average Sound Absorption Coefficients in Cars Based on Sabin Principle

To effectively measure the average sound absorption coefficient of the interior trim materials of cars andaccurately evaluate their acoustical performance inside the car, an in- situ measurement method of the average soundabsorption coefficients based on Sabin principle is proposed. The corresponding process for measurement and calculation isgiven in detail. The measurement result of a car testing shows that this method is effective and practical, and the averagesound absorption coefficient, approximately 0.33, in the car holds steady in the frequency range above 1 250 Hz. This workprovides a method for acoustical performance evaluation and analysis of the interior trim materials of cars.