Method for assembling an acoustic panel using a shaping tool

A method of manufacturing an acoustic panel comprising at least one multicellular body and an acoustic component comprising a plurality of hollow acoustic elements having a shape progressively tapering between a base and an apex, said method comprising:

• positioning a blank made of thermoplastic material between a male portion and a female portion of a thermoforming tool;
• shaping said blank into an acoustic component by a first bringing together of the male and female portions of the thermoforming tool, so as to close said thermoforming tool, the thermoforming tool having a temperature greater than or equal to the glass transition or melting temperature of the thermoplastic material of the blank;
• cooling the thermoforming tool to a temperature less than the glass transition or melting temperature of the thermoplastic material of the acoustic component then opening the thermoforming tool;
• disposing the multicellular body in the thermoforming tool while the acoustic component remains in contact with the male portion of the thermoforming tool, the multicellular body being disposed between the female portion of the thermoforming tool and the acoustic component, then a second bringing together of the male and female portions of the thermoforming tool, so as to press the acoustic component against the multicellular body in order that the hollow acoustic elements of the acoustic component are disposed in the cells of the multicellular body, the male portion of the thermoforming tool having a temperature greater than the glass transition or melting temperature of the thermoplastic material or materials of the acoustic component at least in the contact areas between the acoustic component and the multicellular body.