| 摘要 |
An earphone having an equalizer function is provided to reproduce a low-pitched sound by opening a second exhaust hole, and to reproduce a high-pitched sound by closing the second exhaust hole. In an earphone having an equalizer function, a tubular supporting unit(3) is coupled to the rear of the earphone. An exhaust hole(2) is perforated on the rear surface of a housing(1) to exhaust vibration air generated when a diaphragm vibrates. A second exhaust hole(4) is perforated at a narrow part(3a) of the tubular supporting unit(3). A sleeve type opening and closing unit(5) having an adjusting hole(6) for opening and closing the second exhaust hole(4) is installed in the narrow part(3a) of the tubular supporting unit(3). |
