In order to set noise Standards, an understanding of current research and technology development is imperative. Technological progress continues to push the aviation community to delivering on the ICAO goal of limiting or reducing the number of people affected by significant aircraft noise. ICAO continually monitors research and development in noise reduction technology, and this complements the Standard-setting process.
Aeroplane Noise Technologies
In its eleventh cycle (2016-2019), CAEP conducted an independent expert (IE) review to evaluate aeroplane noise goals by 2027 and 2037. More information on the IE review can be found in ICAO Doc 10127 (2019). The main IE conclusions regarding noise reduction technologies are as follows:
Helicopter noise technologies
As part of the technical monitoring effort, CAEP conducted a status review of the noise technology advancements of helicopters between 2000 and 2015 to highlight the developments since the last helicopter noise assessment report conducted in 2001 (during CAEP/5). The review included examining both noise reduction technologies and the costs associated with those technologies. The results of the helicopter status review can be found here. The report includes an overview of international noise technology programmes and research initiatives, key noise reduction technologies of modern helicopters, and the status of advanced noise reduction technologies currently being tested in research programmes. Constraints and challenges to incorporate both current noise reduction technologies and promising new technologies are also considered.