| 摘要 |
An audio signal processing device receives a first voice analog signal from a portable electronic device and a second voice analog signal of noise from outside environment, and converts the first voice analog signal and the second voice analog signal into a first voice digital signal and a second voice digital signal, respectively. The first voice digital signal and the second voice digital signal are then mixed up to obtain a third voice digital signal. The third voice digital signal is converted into a third voice analog signal outputted to an earphone. A regulator is used to adjust signal intensity of the first voice analog signal and the second voice analog signal.
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