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Diaphragms For Electromechanical Transducers
(AREA)
Abstract
A new membrane for loudspeakers, characterized by presenting a surface of revolution, open from the neck, whose generatrix is double curvature, without continuity solution, slightly concave outwards, from the neck, and becoming convex towards the base area, this membrane consisting of a porous and compressed material, such as paper pulp or the like, which with a substantially equal weight per unit area, is more compressed in the vicinity of the neck and progressively decreases in size. density towards the part of the base, in which it is less compressed and presents, consequently, thicker or thicker. (Machine-translation by Google Translate, not legally binding)
Improvements in or relating to sound amplifying diaphragms or horns for wireless sets, talking machines, musical instruments or other sound producing devices