DIAPHRAGM FOR ELECTROACOUSTIC TRANSDUCER, AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To improve physical characteristics and appearance characteristics, without causing increase in production cost of a diaphragm. SOLUTION: The diaphragm has a three-layer structure, composed of a pair of non-foamed layers formed by ejecting molten resin, containing long fibers, into a cavity and curing the resulted body by decreasing the temperature of the resin, and a foamed layer formed by pressure reduction between the nonfoamed layers by spring-back effect.