How to Remove Background Noise from Audio

Quality audio is among the top factors in professional video production. Even in the case where you have perfect visual content, background noise might make your video seem amateur. This might include sounds like air conditioning, fan noise, traffic, computer sounds, electricity hums, room sounds, key sounds, and conversations.

However, there are tools that are available in current video editing and audio programs that work well to get rid of various types of background noise. The secret in doing this does not involve simply using the most powerful noise reduction feature. Rather, it involves identifying the noise, selecting the right tool, and finding a balance.

Why Background Noise Should Be Removed

Dialogue is difficult to understand due to background noise. This is especially apparent with YouTube videos, interviews, tutorials, podcasts, online classes or voice-overs.

Better audio clarity means more clarity and professionalism to your job. In addition, it makes background music and sound effects sound more natural. According to the instructions provided by Adobe, there is an option for noise and reverb reduction with full control over dialogue levels.

But it needs to be done wisely, since excessive noise reduction can result in making dialogue sound robotic, metallic, or even water-like. It is better to perform some correction which will not change the sound of the recording too much rather than trying to remove all the noise from it.

Identify the Type of Background Noise

Before applying an effect, listen carefully to the recording. Different noises require different approaches.

Continuous noises like fans, air conditioners, computer fans, hiss, and humming from electrical appliances are easy to remove as they tend to remain fairly constant throughout the audio clip. On the other hand, intermittent noises like clicking on a keyboard, doors, traffic, coughing, or any conversation are hard to remove since they occur randomly.

Room echo and excessive reverb are another common problem. In these situations, ordinary noise reduction may not be enough. You may need a dedicated reverb-reduction or dialogue-repair tool.

The first step in professional audio cleanup is therefore diagnosis before processing.

Step 1: Record Cleaner Audio

The most convenient type of noise to eliminate is that which never got recorded.

Prior to recording, select the most silent place you can find. Switch off all the fans and gadgets that are not required, close the windows and doors, and get away from any source of noise.

Microphone positioning should also be considered. Try to set your microphone at such a distance that it could effectively capture a strong voice signal. It would make noise reduction much easier for you.

Try to make a little recording of the room without speaking if possible. This can come handy during editing as it provides you with a pure sample of the background sound.

Step 2: Import the Audio into Your Editing Software 

After all recording, the file should be brought to the editor.

Some common programs are Adobe Premiere Pro, DaVinci Resolve, Adobe Audition, Audacity, and special restoration software. The tools may vary in different programs, but the overall procedure is almost the same – detection, reduction, listening, and adjusting.

Thus, noise reduction in Premiere can be found in the Essential Sound feature, whereas in Adobe Audition there are specific restoration effects.

Step 3: Capture or Identify a Noise Profile

For steady background noise, a noise profile can be extremely useful. Find a short section where the unwanted sound is present but the speaker is silent.

Some noise-reduction systems can analyze this section and use it as a reference for identifying similar noise throughout the recording. iZotope's guidance, for example, describes selecting a section containing only the steady background noise and using it to teach the processing system what should be reduced.

This method works particularly well for consistent hiss, fan noise, and certain types of electrical background noise.

Step 4: Apply Noise Reduction Gradually

After identifying the noise, apply your noise-reduction effect.

Avoid immediately choosing the strongest setting. Start with a moderate amount and listen carefully to the dialogue. Increase the reduction only when necessary.

The objective is not to completely eliminate every sound behind the voice. Instead, the objective is to make the unwanted noise less noticeable while keeping the voice natural.

Adobe's documentation notes that the appropriate amount of reduction depends on the background noise and the acceptable amount of quality loss.

Step 5: Use EQ to Improve Clarity

The process of removing noise is just one step in audio editing. EQ, equalization, may assist in getting rid of the unnecessary frequencies and enhancing clarity of the voice.

Rumble at low frequencies can be caused by such factors as handling, traffic, air conditioning, etc. High-pass filter can assist in cutting the unnecessary frequencies of low frequencies in case they do not belong to the voice recording.

Use EQ very carefully since drastic manipulations will result in unnatural sound of the voice.

Step 6: Balance the Dialogue with Compression

After cleaning the recording, compression can help control large differences between quiet and loud sections of speech.

A properly adjusted compressor can make dialogue more consistent and easier to hear. However, excessive compression can bring background noise back up between words.

A useful workflow is to clean the noise first, then use EQ and compression to improve the overall voice. Finally, adjust the dialogue level against music and other sound elements.

Step 7: Preview Before Exporting

Make sure to always check the processed audio before you render your final video.

Please use both headphones and regular loudspeakers whenever possible.Make sure audio does not contain voice metal sounds, excessive silence, pumping or unnatural transitions, between sentences.

If your processed audio sounds even worse than the original in some parts, make the strength of the effect less.

Common Noise Problems and Solutions

The table below provides a quick reference for common problems and practical solutions.

Best Software for Removing Background Noise

Various editing softwares provide various degrees of control. While some editors are helpful for simple cleanups, other professional editors like restoration programs give more advanced controls.

Adobe Premiere Pro is helpful if you require audio cleanup within the video editing process. In case of advanced restoration, you should consider using the more advanced features of Adobe Audition.

For complex recordings, you may need restoration tools to help give you more control. There are free or simple audio editors which are helpful in less complex situations.

It all depends on the nature of the problem you want to solve.

Avoid Over-Processing Your Audio

One of the mistakes I see new people make is using way too much noise reduction.

If you use much noise reduction the voice might lose its natural sound. Then the voice will start to sound fake and artificial. It is often better to leave a small amount of consistent room noise than to create obvious processing artifacts.

A professional recording should sound natural first and clean second. Use several gentle corrections rather than one extreme effect whenever possible. iZotope similarly recommends smaller, more transparent processing rather than aggressive single-pass reduction.

Prevent Background Noise During Recording

I have found that many recordings can be saved during post‑production. Prevention is always better.

Use a microphone. Listen to recordings through headphones. Choose a spot. Keep all equipment away, from the microphone. A good recording will give your editing software additional information to work with.

Create a list of things to check for your next recordings in order not to repeat the same mistake again.

Final Thoughts

Audio background noise removal is one of the critical skills for today’s video makers. It starts at the pre-editing stage when you use better microphone placement and more quiet conditions for recording. It ends at the post-editing stage when you remove the noise, compress and equalize the voice.

The most important thing in case of noise reduction is not to treat it as something similar to a magic button. The problem should be defined, and after that, the right tool must be selected and applied gradually. In order for the voice to sound natural, one should compare it to the original sound.

With regular practice, you can transform noisy recording into clean professional voice for your YouTube video or any other project.