| 摘要 |
PURPOSE: A lighting device system of noise control / sound treatment function is provided to reduce power consumption of a portable device. CONSTITUTION: A lighting device system of noise control / sound treatment function comprises a noise control processing unit and a speaker. The noise control processing unit functions noise control / sound treatment. The noise control device comprises a speaker unit, ADC, am adaptive signal processing part and an amplifier. The speaker unit outputs a microphone collecting the noise signal transmitted through air and outputs acoustic signal. ADC changes the extracted analog signal into digital signal. The adaptive signal processing part outputs the noise offset signal applied to the residual signal. The amplifier amplifies the noise offset signal and the transformed signal. |
