| 摘要 |
A noise removal headphone is provided to minimize deformation of a low sound band due to a noise removal by properly controlling air pressure inside a headphone through an air injection hole. A headphone housing(110) has a receiving space. A front surface of the receiving space is opened. An internal housing(120) is received in the receiving space of the headphone housing. An air injection hole is formed in the internal housing. A noise is inputted to a microphone(140). An attenuation part analyzes a noise, and generates an attenuation sound. A speaker is received in the receiving space of the internal housing, and generates the attenuation sound generated in a circuit and a sound according to an inputted electric signal. An air injection controller(170) opens/closes the air injection hole, and controls a flow rate of the air. A switch controls operations of the attenuation part. |
