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测量点集中在左后窗和后排座位以后的位置,由风和轮胎引起的噪声可以分别用风洞试验和在消声室内的道路模拟机上来确定。分析仪使用双传声器探头,两传声器间有相位修正设备,以保证在低频区较好的相位匹配。分别测量左后门窗的橡胶密封处,行李舱各表面辐射的A计数声功率,最后评价内饰和振动阻尼垫对车内噪声的影响。若想得到后围板处总的声功率,可以在边墙的周围定义一个箱体。
The measurement points are concentrated after the rear left window and the rear seats, and the noise caused by the wind and the tires can be determined by the wind tunnel test and the road simulator in the anechoic chamber respectively. The analyzer uses a dual microphone probe with phase correction between the two microphones to ensure better phase matching in the low frequency range. Measure the A-count sound power of the rubber seal of the left rear door window and the luggage compartment, and finally evaluate the influence of the interior and the vibration damping pad on the noise in the vehicle. If you want to get the total sound power at the rear panel, you can define a box around the side wall.