Mobile Software →Ear Scout Sound Amplifier v1.7.0

Put on some Bluetooth headphones, tap the center button, and you can hear and amplify what your phone's microphone is picking up.
It's also possible to set up an automatic noise-trigger for audio recordings and have them sent to your email.
Whether you want to responsibly audio-monitor your environment, hear the TV and conversations better (non-medical hearing aid), or just listen to birdsong from indoors, Ear Scout amplifies and streams the audio from the mic to your Bluetooth headset (mic-to-headphone) in real time for remote hearing.
- Headphones required. To avoid audio feedback you need to use headphones.
- Safety feature. After starting the app the volume increases gently to the set level. This way you have time to adjust to high gain settings from the previous session.
System Requirements:
Requirements: Android 5.0+
Home Page-

https://play.google.com/store/apps/details?id=superhearing.app&hl=en