| 摘要 |
A soundproof earphone obtains a stable sound at any places by obtaining the stability of the wearing and the soundproof effect by connecting an ear plug to the existing earphone. The stability of the wearing a soundproof effect are given simultaneously by connecting an ear plug(b) to the outside of an earphone(a). The sound volume is spread widely by making a front part of the earphone roundly. The ear plugs are inserted into the ear after compressing all ear plugs once. |
