![]() For smaller aircraft, business jets and small regional jets, the noise from the jet may still dominate at departure, as it does for many older aircraft. For modern large aircraft, Single Aisle and Twin Aisle, jet noise is a secondary noise source even at departure, with fan noise dominating.The main IE conclusions regarding noise reduction technologies are as follows: More information on the IE review can be found in ICAO Doc 10127 (2019). In its eleventh cycle (2016-2019), CAEP conducted an independent expert (IE) review to evaluate aeroplane noise goals by 20. ICAO continually monitors research and development in noise reduction technology, and this complements the Standard-setting process. ![]() 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. In order to set noise Standards, an understanding of current research and technology development is imperative. LTAG - Long-term global aspirational goal.Noise from Emerging Technology Aircraft.Technology Standards (Reduction of noise at source).
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