| http://www.w3.org/ns/prov#value | - Also, by using a panel, such as a flat panel, which is driven by a piezo-electric actuator, as the loudspeaker, an extremely thin construction can be realised, and the loudspeaker can conveniently be integrated into a sun visor, or be provided as an unobtrusive attachment for a sun visor, in such a way that there is little likelihood of the sun visor or attachment causing any greater injury to the
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