| 摘要 |
PURPOSE:To increase the sound pressure level and to make small the size, by forming the ribbon to almost T shape for the cross section and locating the flat plate in the magnetic gap between plates and the vertical section in the magnetic gap with narrow width. CONSTITUTION:The flat plate 6A of the ribbon 6 of almost T shape for the cross section is located in the magnetic gap 5B with wider width formed on the upper surface between the plates 4A, 4B and the vertical section 6B of the ribbon 6 is located in the magnetic gap 5B with narrow width formed lower opposing sections. When a current flows to the ribbon 6, since passing magnetic flux from the magnet 3A flows in the magnetic gap 5B between this current and the plates 4A, 4B, the ribbon 6 oscillates up and down as shown in Figure, to develop sound waves. |
