Speaker

Abstract

Abstract PURPOSE:To reduce the deformation due to hamonics of an even number of order, by obtaining a symmetrical magnetic flux density distribution having double peaks to the oscillation of a voice coil. CONSTITUTION:The 1st magnetic circuit 13' consists of the 1st permanent magnet 11', the 1st yoke plate 10, the 2nd yoke plate 10' and a center pole 9, and the 2nd magnetic circuit 13'' consists of the 3rd yoke plate 10'', the 2nd permanent magnet 11'', the 4th yoke plate 10''' and the center pole 9. a symmetrical magnetic density distribution having double peaks can be obtained by inversing the direction of magnetization of the magnets 11' and 11''. Thus, the loudness characteristic can be increased and the harmonic deformation of the even order number can be reduced.

Inventors

• 👤 Koji Kito

Bibliographic Details