Patent ID: 8139806
Filing Date: 2012-03-20
Classification: H04R

Abstract:
1. An earphone comprising: an electroacoustic transducer for converting an audio signal into sound; and a housing for holding the electroacoustic transducer, the housing including a sound output unit for introducing the sound produced by the electroacoustic transducer into the external auditory meatus of an ear when the housing is placed in the ear; wherein a sound-emitting surface of the electroacoustic transducer is disposed in a direction transverse to the external auditory meatus of the ear; and wherein the housing comprises a first space located in the rear of the electroacoustic transducer, a second space located in the front of the electroacoustic transducer, and at least one rear opening connecting the first space to an exterior of the housing, the at least one rear opening controlling a treble response of the sound emitted from the electroacoustic transducer.