Abstract: The invention relates to a construction element (1) for use in interior decoration of a building construction (5), comprising a body (2) having a functional, non planar shape by which the construction element is adapted for fulfilling an additional function with respect to wall plastering (6) and which is provided to remain uncovered by wall plastering. The construction element (1) comprises joining elements (4) at one or more peripheral edges (3) of the body (2), adapted for being covered with wall plastering (6) which is applied around the peripheral edges (3) for covering part of the building construction (5). The body (2) and the joining elements (4) are constructed in a reinforced wall plastering material.

Abstract: The invention relates to a construction element (1) for use in interior decoration of a building construction (5), comprising a body (2) having a functional, non planar shape by which the construction element is adapted for fulfilling an additional function with respect to wall plastering (6) and which is provided to remain uncovered by wall plastering. The construction element (1) comprises joining elements (4) at one or more peripheral edges (3) of the body (2), adapted for being covered with wall plastering (6) which is applied around the peripheral edges (3) for covering part of the building construction (5). The body (2) and the joining elements (4) are constructed in a reinforced wall plastering material.

Abstract: An apparatus (7) for reduction of vibrations of a structure (1) has a vibration sensor (8) which is arranged in a structure (1), an actuator (11) which acts on the structure, and a control system (9) which drives the actuator (11) as a function of a signal (10) from the vibration sensor (8). The control system (9) itself has an electrical resonant circuit (14), which defines the profile of a transfer function of the control system (9) between the signal (10) from the vibration sensor (8) and the drive (12) of the actuator (11).