The diaphragm for the speaker and speaker null Young's modulus which

摘要

PROBLEM TO BE SOLVED: To provide diaphragms for speakers and small speakers using the same, which ensures a high sound quality and wide-band frequency characteristics by reducing the FO.;SOLUTION: The diaphragm having a high sound quality with a reduced FO is composed of a resin base 30 and elastomer layers 31 provided on both or one side of the base 30 to form a multiple layer structure. This improves the performance of the diaphragm and reduces its cost. As a speaker, the internal loss, the material width, the weight and the rigidity are optimized to improve the frequency characteristics, reduce the cost, and improve the adhesion and the appearance quality.;COPYRIGHT: (C)2005,JPO&NCIPI