发明授权
US4129195A Diaphragm for speaker 失效
扬声器隔膜

Diaphragm for speaker
摘要:
A diaphragm for a dynamic cone speaker which is composed of a porous metal produced from a metal such as nickel, wherein a layer, such as of aluminum foil, is disposed on a surface of the porous metal to eliminate the gas permeability of the porous metal.
信息查询
0/0