Patent ID: 8505679

Claim:
An aircraft nacelle comprising: an air intake ( 110 ) with a lip ( 114 ) that is extended toward a rear of the air intake ( 110 ) by a pipe ( 116 ) constructed and arranged to channel an air flow in a direction of a power plant ( 112 ), wherein said pipe ( 116 ) comprises at least one acoustic treatment panel ( 120 ) that comprises, from the outside to the inside: an acoustically resistive porous layer ( 122 ), at least one first alveolar structure ( 124 ) whose cells are sized for acoustic treatment, and a reflective or impermeable layer ( 126 ), wherein close to an end that is oriented toward the lip ( 114 ), said reflective or impermeable layer ( 126 ) comprises an inclined face ( 130 ) in such a way as to be connected to the lip ( 114 ), with a second alveolar structure ( 136 ) being in contact with the inclined face ( 130 ) of the reflective layer, the inclined face ( 130 ) forming an angle of less than 30° with a tangent to the acoustically resistive porous layer, wherein the second alveolar structure ( 136 ) is inserted between said inclined face ( 130 ) of the reflective layer and the acoustically resistive porous layer, and the cells of the second alveolar structure ( 136 ) are sized for acoustic treatment.