Patent Number: 7,708,111

Title: Acoustic diaphragm and method for manufacturing an acoustic diaphragm

Abstract: There is provided an acoustic diaphragm which includes a diaphragm base material composed of a paper article comprised of fine mica flakes, pulp fibers, and polyvinyl alcohol fibers and formed to be a multi-cellular structure; and a sheet material combined with the paper article or the diaphragm base material.

Inventors: Uryu; Masaru (Chiba, JP), Tokura; Kunihiko (Tokyo, JP), Tagami; Takahisa (Kanagawa, JP), Ikeda; Emiko (Tokyo, JP)

Assignee: Sony Corporation

International Classification: G10K 13/00 (20060101); H04R 7/10 (20060101); H04R 7/02 (20060101); H04R 7/06 (20060101)

Expiration Date: 5/04/12018