| 摘要 |
A headphone including a housing that includes a speaker unit, and a protruding portion, provided at a specified area of one surface of the housing, that outputs playback sound generated from the speaker unit. When being worn on the head, the one surface of the housing comes in to contact with an outward facing surface of an auricle surrounding a cavity of a concha, and the protruding portion is inserted in to the cavity of the concha.
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