| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an open type condenser headphone capable of suppressing irregularity of a frequency response by eliminating a reactance component in acoustic impedance on a rear acoustic terminal side.SOLUTION: An open type condenser headphone 1 includes a condenser headphone unit 5 in which a diaphragm 8 oppositely disposed at fixed electrode plates 9, 10. A rear part side of the condenser headphone unit is opened. At the rear part side of the condenser headphone unit, a rear end of the condenser headphone unit is provided so as to be annually opened. A rear acoustic terminal connection member 15 for connecting a rear acoustic terminal to the external air is provided. An inner peripheral surface of the rear acoustic terminal connection member is enlarged in diameter toward the rear end opening.</p> |
