| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inner-ear type earphone enabling a user to listen external sound.SOLUTION: The inner-ear type earphone includes an earphone body, an earplug and a speaker unit. The earphone body includes a first wall and a second wall. A chamber is formed so as to be surrounded with the first wall. An external communication path is formed so as to be surrounded with the first wall and the second wall. One end of the external communication path and one end of the chamber are jointly communicated to a user's external auditory canal. The other end of the external communication path is communicated to the external. The earplug corresponds to the one ends of the external communication path and the chamber. The earplug is used so as to be fitted to the user's external auditory canal. The speaker unit is installed in the chamber.</p> |
