Onera developed module to simulate the noise of aircraft in flight

Onera has developed a model and implemented simulations to assess noise annoyance due to the passing of existing or virtual aircraft. Comparisons with flight measurements are excellent. Sound synthesis enables the result to be heard.

Currently, ONERA is involved together with the Cergy Pontoise University, the INSA-Lyon and the company Genesis in the Parasoft project (FRAE project) which is focused on evaluating noise nuisance due to the passing of existing passenger aircraft or of aircraft imagined for the future.

The Carmen software module provided by Onera simulates the sound of planes on the ground by modeling the aircraft noise sources, installation effects and acoustic propagation in the lower atmosphere. Carmen was developed by Onera acousticians and integrated into the IESTA platform Clean Airport application.

Carmen’s validation was performed by confronting it with results obtained from flight tests, in particular those from the European project Awiator measurement campaign, conducted in Tarbes in 2006 with an A340.

Carmen simulates the noise spectrum during the trajectory. The sound synthesis performed by the company Genesis4, which was a partner in the study, made it possible to build the database, which must be assessed by auditors.

Thanks to Carmen, the IESTA platform will enable the impact of new aircraft configurations to be estimated, as well as that of motors whose perceived noise would be less unpleasant and of new flight paths or even devices to reduce noise to be applied to the noise perceived by people living near airports.

See the comparison at the ONERA website:http://www.onera.fr/en/news/iesta-use-carmen-module

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