| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact diaphragm for electroacoustic transducer that maintains advantages of a synthetic resin material such as a PET film and a PEI film, improves internal loss as a disadvantage, and eliminates harmonic distortion due to split vibration as much as possible. <P>SOLUTION: As a diaphragm of a headphone which performs acoustic output by driving the diaphragm by a magnetic circuit, a diaphragm 20 is constituted by providing: a first plate member 21 which is formed of a synthetic resin material as a PET film having small internal loss; and a second plate member 22 which is formed of non-woven fabric manufactured by using pulp as a base material and kneading PET fiber of the same synthetic resin material with the first plate member 21 to have larger internal loss, and then integrates the first plate member 21 and second plate member 22 together through thermal fusion. <P>COPYRIGHT: (C)2013,JPO&INPIT |
