Android Voice Recording - Voice With Background Noice Issue

I am developing an voice recording android application. For this I am using the following code. When I record and play it, I am getting recording voice with background noice. How c

Solution 1:

Are you testing this with the emulator, or on an actual device (if so, which device)? The acoustic tuning (which includes gain control, noise reduction, etc) will be specific to a given platform and product, and is not something you can change.

Jellybean includes APIs to let applications apply certain acoustic filters on recordings, and a noise suppressor is one of those. However, by using that API you're limiting your app to only function correctly on devices running Jellybean or later (and not even all of those devices might actually implement this functionality).

Another possibility would be to include a noise suppressor in your app. I think e.g. Speex includes noise supressing functionality, but it's geared towards low-bitrate speech encoding.

Solution 2:

If you want to NoiseSuppressor then you can use this:

// The following would take effect only on Jelly Bean and higher.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        Log.i("Trying to clean up audio because running on SDK " + Build.VERSION.SDK_INT);

    if (noise && NoiseSuppressor.create(getAudioSessionId()) == null) {
        Log.i("NoiseSuppressor not present :(");
    } else {
        Log.i("NoiseSuppressor enabled!");
    }

    if (gain && AutomaticGainControl.create(getAudioSessionId()) == null) {
        Log.i("AutomaticGainControl not present :(");
    } else {
        Log.i("AutomaticGainControl enabled!");
    }

    if (echo && AcousticEchoCanceler.create(getAudioSessionId()) == null) {
        Log.i("AcousticEchoCanceler not present :(");
    } else {
        Log.i("AcousticEchoCanceler enabled!");
    }
}

This code can remove background noise , echo and gain.