An overview of aircraft noise reduction technologies

The aim of this article is to provide a broad overview of current and future noise reduction technologies used in aircraft industries. It starts by recalling the regulation framework and the European incentives that have triggered efforts in this domain, as well as the major dedicated EU research programs. Then, technologies are introduced in four parts: engine nacelle, fan, jet and exhaust technologies and finally the airframe noise. The article concludes by giving some indications about the present capacity of these technologies to meet the noise reduction requirements and future trends to improve them.