A review of recent situation and technical issues of aircraft noise monitoring

More than 13 years have passed since the ISO 20906:2009 for unattended monitoring of aircraft sound was published. In recent year, data processing technology has rapidly advanced. In order to consider whether there is any discrepancy between the contents of ISO 20906 and the recent situation of aircraft noise monitoring, published information on aircraft noise monitoring and organized the actual situation was collected. In Japan, aircraft noise measurements has been carried out around airports and airfields nationwide as the achievement status survey of "Environmental Quality Standards for Aircraft Noise." Unattended monitoring through the year or short-term measurements have been carried out by local authorities every year. Annual report of the achievement status survey of Environmental Quality Standards for Aircraft Noise has been published every year. On the other, some airport authorities and Japan Ministry of Defense conduct aircraft noise monitoring around airports or airfields and publish the measurement results. Additionally, many overseas airport authorities have been conducting aircraft noise monitoring and publishing the measurement results. This paper introduces the recent status and technical issues of aircraft noise monitoring in Japan and other region. In addition, it discusses on some discrepancy between ISO 20906 and the recent situation of aircraft noise monitoring.