Noise Reduction Technology

​In order to set a new noise Standard in future, 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.


CAEP conducted an independent expert review to evaluate expected commercial aircraft noise levels by 2020 and 2030. The review focused on new novel aircraft and advanced engine concepts. More information on the IE review can be found in ICAO Doc 10017. While a full independent expert review was not conducted during the past three years, CAEP has continued to undertake a comprehensive overview of ongoing worldwide aircraft noise reduction efforts and associated goals. To provide the latest state of technology, CAEP is currently working on an integrated independent expert technology goals assessment and review for engines and aircraft which aims to be delivered to the CAEP/11 meeting in February 2019.


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 he​re. 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.

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