If you are someone who has to stay in a noisy area or near a speaker, this app can help you with that. It will alert you when there is a device around you that can be a source of sound. It can also be used to measure the sound level. There is a built-in decibel meter to measure the sound level. It is very easy to use. There is a selection for a device detector. You can also select the frequency of the device that you want to detect. It will work for you. This is a very simple and easy-to-use app.