A home studio is rarely silent. A fan, a computer, a fridge, a light dimmer, a neighbour or a passing car can all find their way into a recording. Many of these sounds are easy to remove at the source, once they are found. The difficulty is finding them, since many hum quietly in the background and become obvious only on headphones. A simple method helps you track each source down.
This post explains the common sources, how to find each one and what to do about it. The advice applies to any small studio, whether it is a bedroom, a spare room or a corner of a shared space.
The common sources
- Fans and air conditioning: steady, broad noise that is often the hardest to remove.
- Computers and hard drives: fan noise and the clicks of drives.
- Lights and dimmers: a faint hum or buzz, especially from older fittings.
- Appliances: fridges, freezers, washing machines and boilers.
- The building: pipes, lifts, neighbours and footsteps through the floor.
- Outside: traffic, aircraft, wind and people.
Find the source with a silence test
Record ten seconds of the room with nothing running, then switch on one source at a time and record again. Listen after each change, on headphones, to find which source adds the noise you hear. Note the times, so you can return to any source that needs a fix. A quiet, methodical test is faster than guessing.
Fix the sources you can move
Move the computer away from the microphone, or place it on a soft mat to reduce vibration. Put the fridge or the washing machine in another room if possible. Switch off lights that hum, or replace an older dimmer. Each of these changes can make a clear difference, and most cost little.
Treat the sources you cannot move
Some sources cannot be moved, such as the building or the traffic outside. For these, record at a quiet time of day, close the windows and doors, and use a close microphone so the voice is louder than the background. Some background may remain, and a light cleanup can reduce steady noise, but a heavy cleanup will damage the voice.
Check the room with headphones
Many noise sources are only audible on headphones at a moderate level. Check the recording on good headphones, and listen to the quiet pauses. A noise you cannot hear on speakers may be obvious on headphones, and the reverse can also be true.
Keep a noise log
Record the time, the sources switched off and any noise that remains. A log shows the patterns, such as traffic at certain times or a fan that runs in the afternoon. Use it to choose the best time to record.
Common mistakes
- Assuming a quiet room is silent, without checking on headphones.
- Fixing the wrong source, because the cause was not tested.
- Relying on cleanup to remove a noise that could have been switched off.
- Recording at the busiest time of day.
- Forgetting that the computer itself can be a source.
Noise from the equipment itself
Power supplies, laptops, monitors and cooling fans can all add noise you do not hear in the room. A recording of the empty room with all the equipment switched on shows what the microphone picks up. If the noise is steady, try moving the equipment, tidying the cables or changing a power supply. Check each change with the same silence test.
Timing the sessions around the noise
Noise often follows a pattern, such as traffic at the school run, a fridge that cycles every few minutes or a neighbour who works with a drill at the weekend. Use the noise log to plan recordings for quieter periods. A small change to the schedule can remove a problem that no amount of cleanup would fix as well.
Making the silence test repeatable
Keep the silence test in your session notes, with the steps written out in full: which equipment was on, which door was closed, what time it was and how long the recording lasted. A repeatable test lets you compare results from week to week, and it stops you changing two things and forgetting which one made the difference. Repeat it after any change to the room, the equipment or the cables.
Limits
Some noise will always reach a home studio, and the aim is to reduce it below the voice rather than to remove it entirely. Some sources, such as building noise, need time and patience to manage. Judge the room by the recordings you make, and keep improving the setup over time.
Check the noise on the recording
A recording shows the noise more clearly than the ear in the room. The Vocal Checker shows noise, rumble and level problems in a recording you own, which helps you track each source. The Tunedzy Go page covers cleaning phone recordings. For the fan problem in particular, read the fan noise post in this series.
Try it free: Clean Streaming Mic
Learn your room noise, remove it live and feed OBS, Discord or Zoom. Runs in your browser, nothing is uploaded.
Frequently asked questions
How do I find a noise source?
Record silence, then switch on one source at a time and listen after each change.
Why is the computer a problem?
Its fan and drives can add steady noise and clicks close to the microphone.
Can I remove building noise?
Rarely fully. Record at quiet times, close the windows and use a close microphone.
What should I check on?
Headphones at a moderate level, since many noises are obvious only there.
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