Patent ID: 8565467

Claim:
An earphone, comprising: a front housing having a hollow sound tube, a rear periphery of the sound tube spreading outward to form a sealed cover, an outer periphery of the sealed cover extending rearward to form a sealed barrel, the sealed cover defining a locating groove and a tuning hole arranged tandem to respectively penetrate through a front side and a rear side of the sealed cover, the tuning hole communicating with a rear end of the locating groove, the sealed barrel defining a leaking hole connecting between the tuning hole and an external space of the earphone; a tuning element rotatably mounted to the front housing, the tuning element having a base block located in the locating groove, a rear of the base block extending rearward to form a tuning pillar inserted in the tuning hole, one side of the tuning pillar being concaved inward to form a tuning fillister penetrating rearward through the tuning pillar; a loudspeaker for generating sounds; and a rear housing assembled forward to the front housing for locating the loudspeaker between the front housing and the rear housing, wherein a sound cavity is formed among the front housing, the rear housing and the loudspeaker, the tuning fillister is further communicated with the sound cavity, a relative position of the tuning fillister and the leaking hole is capable of being modulated by means of rotating the tuning element to control an air output and a flow velocity of air in the sound cavity so as to tune a bass intensity of the sounds.