| 摘要 |
The purpose of the present invention is to provide a noise control method, which calculates delay time of a system in an environment where surrounding temperature or pressure changes, and controls noise by compensating an error between a noise signal and an opposite noise signal. In order to achieve this purpose, the noise control method in accordance with an embodiment, comprises: a first output step, wherein a first opposite noise signal is generated by receiving a reference signal, and a first sound is outputted with respect to the first opposite noise signal; a first detection step, wherein a first noise is detected while the first sound is being outputted; a second output step, wherein a second opposite noise signal is generated by adding an additional signal to the first opposite noise signal if the first noise is detected, and a second sound is outputted with respect to the second opposite noise signal; a second detection step, wherein a second noise is detected while the second sound is being outputted; and a third output step, wherein a delay time error signal is generated by comparing the additional signal with a signal by the second noise, a third opposite noise signal is generated using the delay time error signal, and a third sound is outputted with respect to the third opposite noise signal. |
