Microphone - hearing aid app for android description: Microphone hearing aid is a very simple and transparent microphone app.
Is can serve you for testing your device 39 s microphone and speaker you can use it as external mic or as a megaphone.
You can easily switch between different input output modes to use it on aux or bluetooth external devices.
Unfortunately all input output combinations are currently not possible on android.
You can also tune the sound by using the equalizer.