How to Remove Background Noise From Recordings

Background noise is one of the most frustrating problems in home recording. You spend an hour setting up the session, record a take you are happy with, and then listen back to hear an air conditioner cycling in the background, traffic noise from the street, or a low-frequency electrical hum running underneath everything.

The good news is that most background noise problems are either preventable at the source or fixable in post-production with modern tools. The key is knowing what type of noise you are dealing with, because different types require different solutions.

This guide walks through the main categories of noise, how to prevent them before pressing record, and which tools and techniques to use when you are cleaning up a recording that already has problems.

For the broader context of recording setup and microphone choice, see our home studio guide and our best microphones guide.

What You Will Learn

• The four main types of background noise and where they come from
• How to prevent noise before it enters your recording
• The best noise removal tools in 2026
• When noise removal helps and when it hurts
• How to chain noise reduction with other processing

Four Types of Background Noise

Broadband Noise (Room Hiss)

Broadband noise is the steady hiss or hum that covers a wide range of frequencies. It is created by microphone self-noise, preamp noise, air handling systems, computers and hard drives, and general room ambience. This is the most common type of noise in home recordings.

It sounds like: A constant "shhhh" or "hmmm" in the background, most audible in quiet passages and between phrases.

Electrical Interference (Hum and Buzz)

Electrical hum appears at the frequency of your local power grid: 50Hz in Europe and most of Asia, 60Hz in the US and Canada. It also produces harmonics at 100/120Hz, 150/180Hz, and so on. Single-coil guitar pickups, unbalanced cables, and ungrounded electrical outlets are common sources.

It sounds like: A steady tonal buzz or hum that does not change character over time.

Transient Noise (Clicks, Pops, and Thumps)

Transient noise consists of brief, sharp sounds: a microphone stand bumped, a car door closing outside, a phone vibrating nearby, or digital clipping artifacts. These are impulse events rather than steady-state noise.

It sounds like: Irregular clicks, pops, thumps, or scratches, each lasting a fraction of a second.

Room Reflections (Reverb and Slap Echo)

Room reflections are not "noise" in the traditional sense but they contaminate recordings in a similar way. Recording in a large, hard-walled room adds reverb tails and early reflections to every source the microphone picks up. This creates a recording that sounds distant, washed out, and difficult to process cleanly.

It sounds like: A slight "room" quality on recordings, a short reverb tail on transients, a sense that the sound is not "dry."

Preventing Noise at the Source

Prevention is always more effective than correction. Every minute you spend reducing noise before recording saves several minutes of processing after.

Address HVAC and air conditioning. Disable your HVAC system during recording sessions if possible. If the room gets too hot or cold, record in short bursts and allow the system to run between takes. Timing your recording sessions around HVAC cycles is a real workflow strategy for home studio producers.

Use a dynamic microphone in noisy rooms. Dynamic microphones reject off-axis noise more aggressively than condensers. In a room with unavoidable background noise, a Shure SM7dB or SM58 will capture far less of that noise than a condenser microphone of any quality level. See our microphone comparison for full recommendations.

Eliminate electrical interference at the connection. Use balanced XLR cables rather than unbalanced TS or RCA cables wherever possible. Balanced cables reject interference picked up along the cable length. Check that your electrical outlets are properly grounded. Consider a power conditioner if your studio is on a circuit with other electrical equipment.

Record vocals with a noise gate configured correctly. A noise gate closes the signal below a threshold, silencing the mic between phrases. This does not remove noise from within a phrase, but it eliminates the steady-state noise that accumulates during silence, which is often the most noticeable artifact.

Position the microphone closer to the source. The inverse square law means that doubling the distance from the source to the microphone reduces the signal level by 6dB. Background noise does not follow the same relationship (it comes from all around). Moving the microphone closer increases the signal-to-noise ratio directly.

Best Tools for Removing Background Noise in 2026

iZotope RX 11 (Standard: $399, Elements: $99)

iZotope RX is the industry standard for audio repair and noise reduction. It contains dedicated modules for voice de-noise, dialogue de-reverb, spectral repair, declicking, dehum, and more. The Spectral Recovery module restores high-frequency content that was lost in lossy audio encoding.

RX is used by post-production facilities, broadcast engineers, podcast editors, and music producers worldwide for audio restoration work. At the Standard or Advanced tier, it is comprehensive enough to fix almost any noise problem. The Elements tier handles the most common cases at a more accessible price.

Best for: Any serious recording work where audio quality directly affects commercial output.

Waves NS1 Noise Suppressor (~$29 on sale)

The NS1 is a simple, single-knob noise suppressor that does one thing well: reduces broadband noise in a signal in real time. It works particularly well on dialogue and vocal recordings. The single parameter controls the aggressiveness of the suppression, making it fast to set up during mixing.

Best for: Quick broadband noise reduction on vocals and dialogue when RX is not available.

Supertone Clear (subscription)

Supertone Clear uses AI-based voice separation technology to isolate voice from noise and reverb. It works as an AU/VST plugin within your DAW and operates on audio in real time. Particularly effective on vocals, podcasts, and voice-over recordings where the primary signal is a human voice.

Best for: Voice-forward recordings where AI separation technology can clearly identify the target signal.

iZotope Nectar (vocals), Neutron (instruments)

Both tools include built-in noise reduction alongside their other processing. Nectar's voice noise cancellation uses machine learning to identify and remove noise specifically in vocal recordings. Neutron applies similar processing to instrument tracks.

Best for: Producers already in the iZotope ecosystem who want noise handling integrated into their vocal or mix processing chain.

Built-in DAW Noise Gate

Every major DAW includes a basic noise gate. FL Studio, Ableton, Logic, and Pro Tools all ship with functional gate plugins. These are not as sophisticated as dedicated noise reduction tools, but for recordings with clear silence between phrases and a relatively low noise floor, a well-set gate removes the steady-state noise between phrases effectively.

Best for: Simple cases where the noise floor is low and a gate-only approach is sufficient.

A Practical Noise Removal Workflow

Step 1: Identify the noise type. Listen carefully to the isolated noise. Is it steady broadband hiss, tonal hum, or irregular clicks? Each requires a different tool.

Step 2: Sample the noise profile. In iZotope RX, you can select a section of pure noise (a gap between phrases) and use it as a noise profile for the reduction algorithm. This targeted approach produces cleaner results than a generic suppressor.

Step 3: Apply the minimum effective amount. Noise reduction processing introduces artifacts at higher settings: a "watery" or phasic character on broadband reducers, resonances from excessive de-reverb. Use the minimum setting that produces an acceptable result. Heavy-handed noise reduction often sounds worse than the original noise.

Step 4: Check in context. Always A/B your processed audio against the original in the context of the full mix. Noise that sounds obvious in solo often disappears into a mix, making aggressive processing unnecessary and potentially counterproductive.

Step 5: Follow with EQ. After noise reduction, apply a high-pass filter to remove any remaining low-frequency noise below the fundamental of your source. For vocals, a high-pass at 80 to 100Hz removes rumble without affecting vocal body.

When Noise Removal Cannot Help

Room reverb baked into a take. If a vocal was recorded in a large, reverberant room, de-reverb tools can reduce the tail but cannot return the recording to a perfectly dry state. The result of excessive de-reverb is often an unnatural, hollow quality. The practical solution is to not use that take, or to blend it with other takes recorded in a better space.

Overlapping sounds at the same frequency. If a dog barking occupies the same frequency range as the lead vocal at the same moment in time, no tool can cleanly separate them. Spectral repair in RX can reduce the artifact, but the fundamental overlap is a recording problem, not a post-production problem.

Deeply clipped audio. Clipping is distortion introduced when an audio signal exceeds the maximum level of the recording system. Clipping repair tools (including RX's Declip module) can reduce the harshness of mild clipping, but severely clipped audio loses information permanently.

Frequently Asked Questions

Q: Can I remove noise from a recording I already published?

A: Yes, if you still have the original audio file. Apply noise reduction to the original, then re-export and re-upload the corrected version to your distribution channels or platform.

Q: Does noise reduction affect audio quality?

A: Yes, if applied too aggressively. Subtle, well-applied noise reduction is transparent. Heavy noise reduction introduces artifacts. The goal is a clean-enough result, not a perfectly sterile one.

Q: Should noise reduction come before or after other processing in my chain?

A: Broadband noise reduction generally belongs early in the chain, before EQ and compression. Removing noise before compressing prevents the compressor from pumping on the noise floor. De-clicking also belongs early, before any dynamics processing.

Q: My room hum is at exactly 60Hz. Can I use EQ instead of a de-humming tool?

A: Yes, a narrow notch EQ at 60Hz (and its harmonics at 120Hz, 180Hz, 240Hz) is effective for electrical hum at those specific frequencies. This is simpler and less artifact-prone than broadband noise reduction for this specific problem. Most parametric EQ plugins can apply multiple narrow notches across the harmonic series.

What to Do Next

With clean recordings in hand, the next step is understanding how to shape them during mixing. Our vocal chain guide walks through the entire processing chain from raw recording to finished vocal sound. For a broader view of the mixing process, see our mixing vs mastering guide.