Electroacoustic Transducer and Ear Speaker Device

An ear speaker device, characterized by comprising:

• an electroacoustic transducer including a housing mounted at a predetermined position of the head of a listener, a speaker unit that is mounted 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 to reach the vicinity of the entrance of the external acoustic meatus of the listener;
• 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.

An ear speaker device, characterized by 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 of 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 in inside space of the housing to reach the vicinity of the entrance of the external acoustic meatus of the listener;
• 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.

An ear speaker device, characterized by 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 of 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 front surface of the speaker unit to reach the vicinity of the entrance of the external acoustic meatus of the listener;
• 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.