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01 July 2024

ACOUSTICS AND DEFENSE

This article looks at acoustic stealth, detection and localization in the military sector. Although the Office National d'Études et de Recherches Aérospatiales (ONERA) is under the supervision of the French Ministry of the Armed Forces, the work carried out in acoustics is essentially for civilian purposes: improving the comfort of aircraft crew and passengers, and above all limiting noise pollution around airports, aerodromes and heliports. The naval field was also addressed at ONERA, which had the opportunity to transpose its knowledge of the aeroacoustics of aircraft propellers and appendages (wing slats and flaps, landing gear) to hydroacoustics.


Discretion for fighter aircraft Far from stealth, it's said that Luftwaffe pilots mounted loudspeakers on their aircraft to further panic the enemy (i.e. us)!1 Acoustic detection of a supersonic fighter is illusory. The aircraft drags its bong sheet behind it throughout supersonic flight; the shock wave perceived on the ground was emitted before the aircraft was vertical, but is heard when it has already passed. In other words, the bomb fell before the noise arrived. On the other hand, the...
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Author

DEA de Spectronomie, Docteur ès Sciences

Recherches en aéroacoustique pour l'aéronautique : avions (turboréacteurs et hélices), hélicoptères (rotors et turbomoteurs).

Auteur du livre "Acoustique industrielle et aéroacoustique", Hermès Science Publications, Paris (janvier 2001), 560 pages.

Actuellement, participation à l'enseignement à l'ISAE Supaéro et à l'ENSIM (Université du Maine). See 2 See the author's other publications

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