DOOR LEAF FOR A TRANSPORT VEHICLE, METHOD FOR DIMENSIONING SAME, DOOR AND VEHICLE FITTED THEREWITH

Said leaf (1) comprises an inner cladding (10) and an outer cladding (20), a filling core (30, 51-56) made of solid material, a frame (70, 72, 74, 76) extending on the periphery of the core, and means for mounting on the door frame. According to the invention, the solid core comprises a filling body (30) made of a first material, referred to as a filling material, at least one tile, referred to as a sound-insulation tile (51-56), said tile being formed from a second material, referred to as a sound-insulation material, said second material having acoustic properties which are superior to those of said filling material, each sound-insulation tile extending only over part of the distance between the claddings (10, 20) on the side of the inner cladding (10). The leaf according to the invention makes it possible to significantly reduce the noise pollution to which the passengers of the transport vehicle are subjected, while maintaining satisfactory mechanical behaviour, in particular in terms of overall rigidity.