| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed earphone with which outside noise is reduced so that sound coming from the earphone is easy to be caught, moreover, with which the sound leakage, that is unpleasant for others is reduced, at the same time, balanced frequency characteristic over a wide band is realized.SOLUTION: A sealed earphone with a communication part comprises: a sound conduit having an ear tip therein or having an ear hole shape itself, in order to enhancing sealing performance; a housing to house an electroacoustic transducer, in which the housing has an internal space and an external space acoustically disconnected with each other. The internal space of the housing has an electroacoustic transducer and an intermediate housing so that the internal space itself is divided into three sections, such as a front space, inner space and a back space. There are communication parts between the front space and the inner space, and the inner space and the back space, so as to be communicated. The communication parts are comparatively small tubular spaces.SELECTED DRAWING: Figure 2 |
