| 摘要 |
The present invention relates to a method and an apparatus for refining sound, especially to a sound refining method and apparatus which remove noise around a listener and provide an interfering sound at the same time, thereby efficiently reducing the noise that a listener is aware of. The sound refining method of the present invention comprises the steps of: receiving noise; generating an offset wave with the same intensity as, and an opposite phase to, the noise using an active noise cancelling unit; calculating the amplitude of the residual wave which is a composite wave of the noise and the offset wave; and generating an interfering sound of the amplitude to substantially remove the amplitude of the residual wave. The noise, offset wave, residual wave, and interfering sound substantially and simultaneously exist. |
