Patent ID: 8861766

Claim:
A headphone set comprising at least one speaker section, the speaker section including: a baffle having a front surface and a rear surface, and at least one sound emitting hole penetrating through the front and rear surfaces; a surrounding wall formed on the rear surface of the baffle so that the surrounding wall protrudes from the rear surface of the baffle in a direction opposite to the front surface of the baffle and surrounds the sound emitting hole on the rear surface of the baffle; a speaker unit installed on the rear surface of the baffle so that the speaker unit is tightly surrounded by the surrounding wall on the rear surface of the baffle and having a front sound-emitting surface that faces the sound emitting hole and having a rear surface; a unit case that touches a protruding end of the surrounding wall, the rear surface of the speaker unit being covered by the unit case and surrounded by the surrounding wall on the rear surface of the baffle such that a first cavity is enclosed by the unit case, the surrounding wall and the rear surface of the speaker unit; a housing that touches the rear surface of the baffle to cover the unit case such that a second cavity is enclosed by the housing, the unit case, the surrounding wall, and the baffle, the second cavity being positioned so as to cover the first cavity between the housing and the baffle, with the unit case being positioned between the first and second cavities; and a microphone having a front sound-receiving surface and a rear surface, the rear surface of the microphone and the front sound-emitting surface of the speaker unit facing each other within the surrounding wall.