FIELD: physics.
SUBSTANCE: present invention pertains to a sound-absorbing panel which is installed on the surface level of an aircraft, having in the direction from the inside out a porous sound-insulating layer, at least one cellular structure and a reflecting or impermeable layer, wherein said porous sound-insulating layer has on the level of the outer surface, which can be in contact with aerodynamic streams, a sheet having open zones (14) which transmit sound waves, and solid zones (16) which do not transmit sound waves. The sheet of the sound-insulating layer has sets of microholes (18), each set forming an open zone (14). The sets of microholes are separated by at least one row of bands of solid zones (16) spaced apart.
EFFECT: optimisation of mechanical and aerodynamic characteristics.
5 cl, 2 dwg
