Abstract: The present invention relates to an object opinion registering device (20) for guiding a person in a decision making situation involving one or more physical objects (10A-10F), the object opinion registering device (20) being arranged to register opinion indications of each of the one or more physical objects (10A-10F), and the object opinion registering device comprising a controller (26) arranged to control at least one object indicator (30) arranged to physically highlight a physical object (10B), among the one or more physical objects (10A-10F), based on registered opinion indications of each of the one or more physical objects (10A-10F).

Abstract: The present invention relates to a light-emitting building element (1) comprising a plurality of solid-state light sources (19); and a sound-absorbing element (10) having an optically reflective side (15). The sound-absorbing element (10) is arranged such that the optically reflective side (15) faces the plurality of solid-state light sources (19), and comprises a plurality of holes (17) through the sound-absorbing element from the optically reflective side to an opposite side (16) of the sound-absorbing element. Each of the holes (17) is configured such that a projection of the hole in a plane parallel to the sound-absorbing element (10) is smaller than a smallest area of a cross-section of the hole (17), the cross-section being perpendicular to a normal of the sound-absorbing element (10).

Abstract: A wavefront modification apparatus that has a plurality of acoustic emitters, the acoustic emitters configured to emit acoustic waves which travel at least partially across a radiation beam conduit. The acoustic emitters may be configured to establish a standing acoustic wave which extends at least partially across the radiation beam conduit. The wavefront modification apparatus may be provided in a lithographic apparatus, and may be used to modify the wavefront of a radiation beam which is used by the lithographic apparatus to project a pattern onto a substrate.