我正在处理一个实时视频流项目，并且正在努力解决来自麦克风的额外噪音。我正在使用 speex 编解码器，这里是我使用的设置。
microphone = Microphone.getEnhancedMicrophone();
microphone.codec ="speex";
microphone.enableVAD = true;
microphone.setLoopBack(false);
microphone.setUseEchoSuppression(true);
microphone.setSilenceLevel(0);
microphone.rate=44;
microphone.gain=1;
microphone.encodeQuality = 6;
microphone.
var micOption:MicrophoneEnhancedOptions = new MicrophoneEnhancedOptions();
micOption.mode = MicrophoneEnhancedMode.FULL_DUPLEX;
micOption.echoPath = 256;
micOption.autoGain = true;
micOption.nonLinearProcessing = true;
microphone.enhancedOptions = micOption;
我应该在哪里进行更改，为什么？