How to remove noise in audio track by using Audacity software

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Today we will discuss how to reduce or remove background noise from a audio in a living room. Normally we may use any phone earphone microphone or normal phone microphone or laptop microphone. So before startling our recording we checkout some common setup and procedure. We may called it as pre-recording setup.

Pre-recording setup

Turn off noise making devices and machine

Fans, air conditioners, refrigerators, computers fans and other moving machine may cause background noise in our recording. Try to turn off all such devices and machine, if possible.

Choose a different room other than living room

Now look to the floor, carpet, walls and furniture in the room. The less “flat” you can make the room, the less the sound will re-vibrate.

Maintain a distance between your laptop from microphone

Place your microphone away from the laptop and place as far away as possible. Try to minimize your running software to prevent heat up your machine and fans speed up. Laptop fan speed up can introduce noise in your recording.

If possible try a dynamic microphone

Condenser microphones can capture a beautiful range of audio, but they are too much sensitive to noise from the surroundings. Dynamic microphones are traditionally not as good with the audio range, but are more focused in what they capture and aren’t as sensitive to room noise.

Reduce the gain and get closer to the mic

The microphone won’t eat you! Get closer to it! You may think this will distort your audio and you’re right, but that’s why you reduce the gain, which is the mic’s sensitivity. The more sensitive the mic, the more noise it will capture. Imagine it like a bubble around your mic. Gain makes the bubble bigger, which captures more sound. Make the “bubble” smaller and get inside it! But be careful about your breathing sound.

Try to use a USB adapter

If you record directly into your computer, converting that analog audio signal to digital before in reaches your computer has proven an effective method for reducing computer interference noise. Try a adapter or converter 3.5 mm jacks to USB port.

Removing noise after you have recorded

Do everything you can to reduce the noise before you record. It’s possible to easily reduce it so much, that you won’t need to removal the noise afterward. There are probably some of these steps you can implement to get better recordings. If you still need to edit things after you recorded, here’s how to remove noise with Audacity.

  1. Select the “silent” section of your audio, where it’s just noise.
  2. Go to the Effects menu and click Noise Reduction.
  3. Click Get Noise Profile.
  4. Select all of the audio from which you want that background noise removed.
  5. Go to the Effects menu and click Noise Removal.
  6. Adjust the settings if necessary (defaults are fine) and click OK.
  7. Its done, see the thin blue line in the starting of your track.
  8. Listen to ensure your audio doesn’t sound like it’s underwater.

Source: theaudacitytopodcast.com

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