| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrodynamic sound emitting body which is thin and lightweight, is excellent in environmental resistance characteristics such as water resistance, and has proper frequency characteristics as a sound emitting body for on-board equipment in spite of a simple structure. <P>SOLUTION: An electrodynamic sound emitting body includes a case (4) covering an outer yoke (1) and forms an acoustic space (22) by the case, a diaphragm (8), and an outer surface of a side wall of the outer yoke. The electrodynamic sound emitting body further includes a second elastic member (10) which connects a case outer peripheral part with a diaphragm outer peripheral part without forming spaces. The second elastic member is formed by a material which has cavities generated by foaming and the elastic modulus smaller than that of a first elastic member (9). The second elastic member is formed so that the cavities, communicating a rear surface that is the case inner side of the second elastic member with a front surface that is an opposite surface of the rear surface, do not exist. <P>COPYRIGHT: (C)2013,JPO&INPIT |
