How to Get Rid of Ambient Noise
You’ve perhaps noticed that at times your recordings can sound a little bothersome due to the background noise captured in the recording process. If you’ve ever used a microphone to record your voice using your computer, you’ve likely been annoyed by the background noise that is picked up along with your recording.
Ambient noise is background or room noise. Such background noise ruins a recording, making it sound awful and sloppy. Luckily, there’s a way to fix this problem, and it won’t cost you a cent. This white noise is not always easy to remove, but can be reduced by the use of free tools and a little know-how.
Reduce Mic’s Sensitivity
Reduce the sensitivity of the microphone recording settings to the minimum until it’s only the voice you hear.
Make source louder
To really get rid of ambient noise, you need to drown it out by making your source louder (sounds simple). Place the microphone quite close to your mouth, and probably speaking louder than normal. You want to get good levels with the minimal amount of gain. Note that if you place the microphone too close to your mouth you will probably have problems with ‘p’ and ‘t’ sounds. You may need to invest in a pop filter to get rid of these.
Human voice only takes up a small portion of the audio spectrum. Use EQ to get rid of a lot of outside sound. Use a high pass filter first to cut out any low frequencies. You can also use a low pass (high pass + low pass = band pass) to remove high frequency sound. However, ambient noise will most likely be low frequencies, and you want to be careful when cutting high frequencies that you don’t make everything sound boxy.
If you only really notice the ambient noise in parts where you aren’t speaking, you can get rid of them with a noise gate. What a gate does is simply mute the audio if the volume is below a certain threshold. As long as your voice is a reasonable amount louder than the background, you can completely eliminate background noise during moments where you aren’t speaking.
What compression does is squash the dynamic range of an audio source. It has the effect of making all parts the same volume. Using compression, you can boost the audio without clipping and make the vocals sound a lot louder. However, compression causes the quiet bits to become the same volume as the loud bits. This could actually make the ambient noise louder. If you employ a noise gate before the compressor, you can get good results.
Noise reduction software
The noise reduction software is also good for not only removing unwanted background noise but it can be priceless for getting rid of unwanted noise in the music we produce too. There is a lot of software that can be used to reduce noise. You can also download some from the internet.