Ear Spy is an interesting application with which you can amplify the sound of everything surrounding you, even the most distant sounds. This way, you can hear conversations between people that are far from you or in adjacent rooms.
To use Ear Spy, you need headphones, and in many cases, interference can make understanding what you are listening to a little difficult, but conversations can be heard clearly if there is no other source of sound nearby. It is a great tool if you want to hear the TV better but you can't raise the volume, for example.
Even though the app's function is to amplify the sound that goes into the microphone of your device, you can adjust the signal by using the five-band audio equalizer to eliminate noise, or use a virtualizer to hear everything else without a problem.
To start listening, you just have to press on the center button. The sound will reach the microphone automatically. If you think you need to amplify the bass or lower any specific value to hear better, you can adjust it from the main window. The application can work in the background, so you can use your device as normal and still hear everything that happens around you.