Audio processing device and method and electro-acoustic converting device and method

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.