In this opportunity we want to help you with a simple step-by-step guide on how to eliminate the environmental noise presented in audio recordings, whether from a cell phone or recorded directly to the PC, nothing professional but acceptable for the common ear. If you wanted to record your voice or something in particular in a simple way and you want to improve it, this is for you.
The work we will do with the open source program Audacity, which we will download from the page https://www.audacityteam.org/download/, is take the one that is according to your operating system, is available for windows, macOS and linux. In Linux it will surely be available to download from repositories.
After doing the corresponding installation and counting on that we have a microphone to record or with an audio file, we proceed to open it.
This is how you see the interface with the audio/recording already installed.
Click on the selection tool or press F1.
Then we select an area where there is no sound made by us (central area of the image).
Then select the Effect/Noise Reduction menu.
Click on Get noise profile, so that the program has the pattern of what will be removed from the audio. The window will close.
Click on that area to select everything.
Back to the menu Effect/Noise reduction. We can change some values and listen as it would be, when we are satisfied we press accept.
Visually we can denote that it looks different when the majority of the noise is eliminated.
Then we save as MP3.
