Indoor Sonic Boom Reproduction Using ANCReport as inadecuate

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1 LMA - Laboratoire de Mécanique et d-Acoustique Marseille

Abstract : The European programs for development of supersonic air-flights involve new studies on the human perception of sonic boom. Because this noise includes high-level components at very low-frequency, the usual psycho-acoustic tests with headphones are not relevant; instead, the original sound-field can be reproduced with many loudspeakers in a small room, but the loudspeakers must be controlled for an accurate reproduction, both in time and space, in an area large enough to enclose a listener-s head. In this paper, Active Noise Control is applied to sonic boom reproduction through Boundary Surface Control as named by S.Ise of the acoustic pressure around a listener. A small room was built at LMA with sixteen powerful low-frequency acoustic sources in the walls. Frequency and time-domain numerical simulations of sonic boom reproduction in this room are given, including a sensitivity study of the coupling between a listener-s head and the incident sonic boom wave which combine into the effective sound-field to be reproduced.

Mots-clés : contrôle actif reproduction de champs sonores bang sonique active noise control sound field reproduction sonic boom

Author: Nicolas Epain - Emmanuel Friot - Guy Rabau -



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