DIAPHRAGM SPEAKER PACKED WITH FOAMED RESIN

摘要

PURPOSE:To improve an electro-acoustic conversion efficiency, by packing a foamed resin with comparatively low density on the front surface of a diaphragm plate and fixing a thin plate having comparatively great flexible rigidity. CONSTITUTION:A corn 1 is made of aluminum or paper with comparatively large specific elastic rate. A foamed resin 2 with cone frustum with comparatively large flexible ridigity at low density is packed in front of the corn 1. A thin plate 3 of the foamed resin having comparatively flexible rigidity is fixed to the surface of the cone frustum foamed resin 2. This can also be applied to a dome type speaker similarly.