Patent ID: 8175316
Filing Date: 2012-05-08
Classification: H04R

Abstract:
1. An ear speaker device, comprising: an electroacoustic transducer including a housing mounted at a predetermined position of the head of a listener, a speaker unit that is mounted on one surface in the housing, and is positioned away from an entrance of an external acoustic meatus of the listener for a predetermined distance when the housing is mounted on the head of the listener, and a tubular duct that is extended so as to allow a sound generated by the housing in the inner space thereof to reach the vicinity of the entrance of the external acoustic meatus of the listener, and a hole in a sidewall of the tubular duct for emitting sound of the duct is oriented to the opposite direction with respect to the entrance of the external acoustic meatus; and a mounting part that is used for mounting the electroacoustic transducer on the head of the listener in a manner that the predetermined distance is provided between the speaker unit and the entrance of the external acoustic meatus of the listener.