Self-supporting acoustic insulation panel, the panel comprising: - a visible wall which is opposite a location which is intended to be acoustically insulated, the visible wall not being self-supporting and being visible to an individual, - an invisible wall opposite a source of sound waves, the invisible wall not being self-supporting and being invisible to the individual, - a porous core which is arranged between the visible wall and the invisible wall, - a plurality of connection elements which each extend from the invisible wall to the visible wall, each connection element extending through a hole of the core and being connected to the visible wall and the invisible wall, each connection element being intended to separate the visible wall from the invisible wall and to mechanically connect the visible wall and the invisible wall by acoustically decoupling the visible wall and the invisible wall, two adjacent connection elements being separated by an inter-element connection distance, - a damping connection means which fixes at least one end (6, 7) of a connection element to one of the visible wall and invisible wall, the damping means being an adhesive; characterised in that the predetermined inter-element connection distance is greater than a minimum threshold equal to 150 millimetres, the predetermined inter-element connection distance being less than a maximum threshold equal to 500 millimetres; and the core has a thickness less than the length of the connection elements, the thickness representing the dimension of the core between the visible wall and the invisible wall, the length representing the dimension of a connection element between the visible wall and the invisible wall. - a visible wall which is opposite a location which is intended to be acoustically insulated, the visible wall not being self-supporting and being visible to an individual, - an invisible wall opposite a source of sound waves, the invisible wall not being self-supporting and being invisible to the individual, - a porous core which is arranged between the visible wall and the invisible wall, - a plurality of connection elements which each extend from the invisible wall to the visible wall, each connection element extending through a hole of the core and being connected to the visible wall and the invisible wall, each connection element being intended to separate the visible wall from the invisible wall and to mechanically connect the visible wall and the invisible wall by acoustically decoupling the visible wall and the invisible wall, two adjacent connection elements being separated by an inter-element connection distance, - a damping connection means which fixes at least one end (6, 7) of a connection element to one of the visible wall and invisible wall, the damping means being an adhesive; characterised in that the predetermined inter-element connection distance is greater than a minimum threshold equal to 150 millimetres, the predetermined inter-element connection distance being less than a maximum threshold equal to 500 millimetres; and the core has a thickness less than the length of the connection elements, the thickness representing the dimension of the core between the visible wall and the invisible wall, the length representing the dimension of a connection element between the visible wall and the invisible wall.