Abstract: The present invention provides a wiping blade (30) for removing water from a surface having one or more vertebrae (32, 34, 36, 38) comprising at least one rail (32, 34) and at least one spring (36, 38), wherein said rail (32, 34) is curved and provides an elastic force quasi perpendicular to the windscreen, and said wire spring (36, 38) is fitted to said rail over its entire length or a part thereof and provides an elastic force in the direction of the length of the vertebra.
Abstract: Multi-functional electro-acoustic apparatus has a bending wave panel loudspeaker, an input device (11) forming part of the surface of the bending wave panel (5), and means (13) for providing force feedback to the input device. An electro-acoustic transducer (15) attached to the bending wave panel excites bending waves in the panel to produce an acoustic output. The panel (5) provides several functions and may be considered to be a hyper-functional surface (HFS).