Reduce Breathing Noise

First decide whether the breath actually needs changing. Listen to the complete sentence at your intended playback level. A breath that stands out in a soloed, enlarged passage may sit comfortably in the finished recording. For commissioned narration, agree with the client whether the goal is lighter breaths, muted breaths or a different editorial rhythm before applying the decision to a whole book.

Keep an untouched source file and make an editing copy. Lowering the level of a breath, replacing the interval with silence and deleting the interval are different operations. Lowering or muting can retain its duration. Deleting and closing the gap moves what follows; in a video or aligned multitrack session, that can change timing.

For a production edit, a useful starting point is the smallest local reduction that makes the breath less distracting. Preserve the pause unless changing the pacing is part of the agreed edit. A waveform can help locate a passage, but listen before deciding that a small patch is a breath rather than a quiet consonant.

Audacity’s Envelope Tool changes a track’s volume smoothly over time using control points. Its manual distinguishes this from the track gain slider, which changes the whole track. That makes an envelope useful when one inhale is too loud but the surrounding words are already at the right level.

1. Open the editing copy and find one intrusive breath by listening. Include the word before it and the word after it in your comparison.
2. Zoom in enough to place the edit boundaries. Check the start and end by ear; the visible shape alone cannot tell you what sound to remove.
3. Select the Envelope Tool. Add control points around the breath so the surrounding speech stays at its existing level.
4. Lower the portion containing the breath, with smooth transitions into and out of the reduction. Leave quiet word beginnings and endings outside the lowered region.
5. Replay the complete phrase, then compare with the unchanged version at a similar listening level. Restore or move a point if a consonant disappears or the transition draws attention.

If the breath overlaps a wanted word, lowering that whole passage lowers the word too. Narrow the edit only when you can do so without cutting into speech. Leave the breath in, or ask for a more careful review, when the voice suffers.

You can also use Audacity’s Amplify effect on a selected passage. Its Amplification (dB) field sets the amount of change: a negative value makes the selection quieter. New Peak Amplitude sets the intended resulting peak. These are different controls, so copying a number into the wrong field can produce a very different edit. Choose the change by listening to your recording.

Save the editable project. Audacity’s manual also notes that some later effects can remove envelope changes. Recheck the result after further processing and after export; do not rely only on how the envelope looked while editing.

A noise gate reacts to signal level. Audacity’s documentation describes audio above its threshold passing through, while audio below it is reduced or stopped. It does not follow that every sound below the threshold is an unwanted breath. A softly spoken word may be quieter than a loud inhale.

An expander also reduces sound below a threshold, with the amount of reduction governed by its controls. OBS’s documentation describes expansion as an alternative that can make the opening and closing less abrupt. It also warns that pushing the threshold too far can cut off the voice. These are processing principles, rather than a recommendation to send an existing file through a live-streaming setup.

Test a short, representative section before processing a long recording. Include a loud breath, a quiet phrase, a word ending and a pause with background sound. Set the threshold and reduction amount for that material, then check the attack, hold and release or decay controls. Listen for clipped word starts, lost endings and an obvious rise and fall in the background.

If breaths and quiet speech occupy similar levels, a threshold cannot reliably separate them on that distinction alone. Return to local editing or a lighter reduction. A dedicated breath-detection tool offers a different way to identify events, but its output still needs the same speech and timing checks. Preview a representative section before committing a whole recording.

Audacity describes Noise Reduction as a tool for constant background sounds such as hiss, hum and fan noise. It needs a representative region containing only the noise to be reduced. A changing inhale beside speech is a different problem from a steady background bed.

Do not turn a breath containing part of a word into a noise profile and apply it across the recording. For an isolated breath between phrases, a local volume change gives you a more direct way to choose the affected interval. If steady hiss is also present, treat it as a separate problem and compare the voice again after each stage.

A quieter background can still leave an intrusive breath. Judge whether the particular problem improved rather than assuming every kind of noise needs the same treatment. Our audio hiss guide covers that separate decision.

Listen through the export, including passages you did not edit individually. Check that quiet words remain understandable, pauses still fit the delivery, and background changes do not draw attention. Compare it with the original, rather than judging the processed file on its own.

• Speech: listen to word starts, endings, whispers and breathy delivery.
• Continuity: check transitions into and out of lowered breaths. A suddenly empty gap can be more distracting than the original inhale.
• Timing: check the beginning, middle and end against the picture or other tracks when synchronization matters.
• Delivery: confirm the required file format with the recipient and keep the editable project as well as the source.

For a long narration, approve a short representative edit with the client before repeating it. That sets a shared expectation without assuming the same threshold or amount of reduction will suit every passage. Automated processing can reduce repetitive work; it does not remove the need to listen.

Before uploading a recording to an online tool, check whether you are allowed to share it and read the provider’s current file-handling terms. Keep a copy you control. This guide does not establish any particular provider’s confidentiality, access or deletion practices.

If a recording may be used as evidence, keep the original and its recording context. Do not apply a cosmetic narration workflow to the only available file. In its digital audio authentication guidance, SWGDE explains that original data should be protected from modification and that transcoded versions are not original recordings.

Discuss the listening question and any proposed processing with the person responsible for the examination. Keep a processed listening copy clearly identified and retain a record of what changed. This guide cannot decide whether an edit is appropriate for a particular case or whether a recording is authentic.

Our guide to preserving audio and video evidence explains the source-handling questions. For a production recording that still needs help, dialogue cleanup is a way to request a review. A free file review and paid cleanup are separate steps; discuss sensitive material before sharing it.

This guide compares Audacity’s descriptions of local volume controls, noise gating and steady-noise reduction with OBS’s explanation of expansion. It uses SWGDE’s digital audio authentication guidance for the original-recording boundary. The workflow applies those distinctions to selective breath reduction in existing spoken recordings.

It is a guide based on published documentation, rather than a test of a submitted recording or a measured comparison of software. Control names and behavior can differ by application and version. No universal threshold, attenuation amount or recovery result follows from these sources. Check the particular recording and the exported result.

Start with one distracting breath, lower it on an editing copy, and listen to the whole phrase again. Preserve the voice and the intended pause. Use automation when it helps the workload, then check the result with the same care. When the change harms speech or timing, undo it and choose a lighter edit.