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Quantifying How the Environment Effects SAE-J192 Pass-By Noise Testing of Snowmobiles

机译：量化环境效应SAE-J192通过雪地摩托车的噪声测试

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A study was performed to understand how the environment affects the results of J-192 pass-by noise testing of snowmobiles. This study involved measuring the sound pressure at 7 different microphone positions due to both speaker excitation and various snowmobiles passing through the microphone array. Simultaneous to the sound measurements, weather conditions were recorded including wind speed and direction, temperature, humidity, snow depth, and in some cases ground hardness. All measured data was then used to determine which environmental factors influenced the measured sound pressures the most. Finally, a sound power approach was also used to measure the snowmobile pass-by noise to determine whether this method was more repeatable than the single microphone approach which showed variations of over 7 dBA over the course of testing.
机译：进行了一项研究以了解环境如何影响雪地摩托的J-192通过噪声测试的结果。这项研究涉及通过扬声器励磁和通过麦克风阵列的各种雪地摩托车来测量7种不同的麦克风位置的声压。同时进行声音测量，记录天气条件，包括风速和方向，温度，湿度，雪深，以及在某些情况下的地面硬度。然后使用所有测量数据来确定最多影响测量声压的环境因素。最后，还用于测量雪地摩托通过噪声以确定该方法是否比单个麦克风方法更加重复，在测试过程中显示出超过7个DBA的变化。

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