The Effect of Wind on Low Frequency Noise

The impact of wind on the measurement of low frequency noise is a topic that is worth researching into. Since the existing “Measuring Method of Environmental Low Frequency Noise” applies only to indoor measurement of low frequency noises (According to the provision of law in our country, low frequency refers to the frequency range of 20 Hz ~ 200 Hz), if a petitioner demands measuring the low frequency noise at an outdoor location, there is no method and/or control standard for outdoor measurement of low frequency noise currently available in our country. This paper aims to explore the effect of the windscreen on reducing wind noise. It is hoped that the findings of the study can serve as reference for formulating method and control standard for outdoor measurement of low frequency noise. When conducting noise measurement, if the sensor of the sound meter is affected by the effect of wind force, there is an influence of wind noise on the measurement, particularly at low frequencies (20 Hz ~ 200 Hz). This study aims to explore the effect of wind noise on outdoor noise measurement at low frequencies. Through comparing and probing into the effects of wind noise when using different types of windscreens, we have obtained some noticeable noise reducing results under different wind speeds when using different types of windscreens, which might serve as reference for selecting windscreens when conducting outdoor noise measurement at low frequencies.