Provided is a smart earphone with a smart mixing module optimally mixing device audio and external sounds. The smart mixing module (300) includes: an external sound detecting unit (310), a sound control unit (320), a sound output unit (400); an energy detecting unit (311), a voice activity sensing unit (312), a noise energy sensing unit (313), an adaptive filtering unit (340); an acoustic quality improving unit (341), a background noise removing unit (342), a specific situation recognizing unit (343), a warning sound generating unit (344), and a sound mixing unit (330). The smart earphone enables a user to clearly hear the ambient sounds to which the user has to pay special attention while the device audio is outputted.;COPYRIGHT KIPO 2016
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