1. An audio processing device, comprising: a first receiving module, configured to receive a first audio signal; a second receiving module, configured to receive a second audio signal; an audio synthesizing module, configured to synthesize the first audio signal and the second audio signal to obtain a third audio signal; and an audio outputting module, configured to output the third audio signal; wherein the first receiving module receives the first audio signal by using a wireless receiving technology; and/or the second receiving module receives the second audio signal by using a wireless receiving technology; wherein a delay of the wireless receiving technology employed by the first receiving module is less than a first predetermined threshold; wherein the audio outputting module outputs the third audio signal by using a wireless communication technology; wherein a delay of the wireless communication technology employed by the audio outputting module is less than a second predetermined threshold; wherein a sum of the first predetermined threshold and the second predetermined threshold is less than or equal to 50 ms; and wherein the wireless receiving technology employed by the first receiving module is an analog communication receiving technology, and the wireless receiving technology employed by the second receiving module is a digital communication receiving technology.
4. The device according to claim 1 , wherein the first predetermined threshold is less than or equal to 50 ms.