A Study on Noise Measuring Heights for Highway Roadside Measurements

Noise from highways is often required to be measured and monitored for noise reduction on highways. However, the selection of measuring point is very important on road noise measuring because of the noise levels become different according to measuring distance and height. But, it is not easy to decide the measuring point on Korea highways for noise level monitoring because most of highway roads in Korea have banking or cutting geometric structures unlike that of American or European highways. In this study, noise measuring heights and methods have been considered at highway roadside for assessing the radiating noise from the road, since almost highways are built according to standards, and it is believed that if the height of measurement on shoulder-length roads is identical, noise can be measured on almost the same conditions at sites with similar lines or gradients. For the study, noise measured from the height of 1m, 3m, 5m, 7m at highway roadside have been compared and a reasonable method has been suggested for assessing noise from the highway.