| 摘要 |
<p>A planar speaker comprising a vibration membrane having a volute voice coil on both surfaces or one surface of an insulation base film, and a permanent magnet associated with the voice coil, wherein the vibration membrane is formed by applying a linear conductor in a coil manner to a sheet-like substrate having an adhesive layer on at least one surface, thereby forming the volute coil, or the portion of the vibration membrane corresponding to the loop of the primary vibration mode or secondary vibration mode is reinforced by a rigidity imparting member, or the substrate for the vibration membrane is a resin foam, or the voice coil is three-dimensionally formed.</p> |
