Microphone Amplifier app uses the microphone as sound amplifier and hearing amplifier to amplify sound from your surroundings for louder hearing. Microphone Amplifier app use the Android device’s microphone or headset microphone for sound amplification. Microphone Amplifier is an Android microphone app that helps people hear conversations or their surroundings, and amplify sound from TV for louder hearing using the phone microphone and Bluetooth earphones.