How to eliminate plosives in your microphone recording
A sudden low-frequency thump at the beginning of a word can make an otherwise polished recording sound amateurish. These noises are called plosives, and they usually occur when fast-moving air from a spoken consonant hits the microphone diaphragm. The result may be a distorted burst that is difficult to remove completely after recording.
Plosives are most common with words containing hard “P,” “B,” and sometimes “T” sounds. They can affect podcast dialogue, voice-over work, livestreams, video narration, interviews, and music vocals. The problem is especially noticeable with large-diaphragm condenser microphones, although dynamic microphones can capture it too.
The best solution is usually a combination of microphone placement, a pop filter, controlled speaking technique, and sensible recording levels. Software can reduce the remaining damage, but prevention gives you clearer, fuller speech without forcing heavy processing onto the track.
Why plosives happen
Speech produces short bursts of air as your lips close and release. With a word such as “power,” “broadcast,” or “podcast,” the air can travel directly toward the microphone capsule. When that air strikes the diaphragm, the capsule moves abruptly and generates a deep, explosive sound.
The recording may show this as a large waveform spike. You may also hear a momentary rush of bass, distortion, or a dull thud under the consonant. Because the burst contains strong low-frequency energy, it can trigger compressors and limiters, making the entire recording pump or dip unnaturally.
Microphone design influences the severity of the problem. Sensitive condenser microphones often reveal more detail, including unwanted air movement. Front-address microphones can be especially vulnerable when the speaker talks directly into the capsule. A dynamic broadcast microphone may reject some room noise and breath, but it is not automatically immune to plosives.
Distance also matters. Speaking very close to the microphone increases vocal intimacy and bass response through the proximity effect, but it leaves less space for the air burst to disperse. A close microphone position can therefore make plosives louder even when the microphone itself sounds excellent.
Start with microphone placement
The simplest adjustment is to avoid aiming your breath straight at the capsule. Instead of speaking directly into the front of the microphone, rotate it slightly off-axis by roughly 20 to 45 degrees. Your voice still reaches the capsule clearly, while the strongest airflow passes beside it.
You can also position the microphone slightly above or below your mouth and angle it toward your lips. This approach is useful for podcasting and streaming because it preserves a direct, present vocal sound without placing the capsule in the center of the air path. Test several angles while saying words with strong “P” and “B” sounds.
A practical starting distance is between 10 and 20 centimeters from the microphone, depending on the model and your desired tone. If you move farther away, increase the input gain carefully and listen for more room sound. If you move closer, reduce the gain and watch for bass buildup, breath noise, and plosives.
Keep your mouth at a consistent distance during the recording. Moving forward for emphasis can bring your lips into the most vulnerable position, while leaning back can make the voice suddenly quieter and more distant. A small stand marker, boom-arm position, or visual reference can help you maintain a reliable setup.
Use a pop filter or windscreen
A pop filter is one of the most effective tools for controlling explosive consonants. It uses a layer or mesh of fabric, metal, or another porous material to slow and disperse the air before it reaches the microphone. The filter allows sound to pass through while reducing the pressure of direct breath.
Place the pop filter a few centimeters in front of the microphone, then speak a little farther behind it rather than pressing your mouth close to the filter. This creates two barriers: the screen interrupts the air burst, and the extra distance gives the airflow more room to spread. A filter that touches the grille may still work, but it offers less flexibility for positioning.
A foam windscreen can also reduce plosives, especially for handheld microphones, lavalier microphones, field recording, and outdoor video work. Foam is convenient and often protects the capsule from breath and wind, but it can slightly soften high frequencies. A well-designed external pop filter is often the better choice for studio podcasting and voice-over.
| Method | Best use | Main advantage | Possible limitation |
|---|---|---|---|
| Off-axis placement | Podcasts, streaming, voice-over | Costs nothing and preserves clarity | Requires consistent positioning |
| Fabric pop filter | Studio vocals and spoken word | Strong protection against air bursts | Needs a stand or mounting space |
| Metal pop filter | Frequent studio recording | Easy to clean and durable | May allow more breath through than fabric |
| Foam windscreen | Handheld and mobile recording | Portable and simple to fit | Can reduce some high-frequency detail |
| Increased microphone distance | Natural-sounding speech | Reduces airflow and proximity bass | Captures more room sound |
| Editing and automation | Occasional remaining plosives | Useful after recording | Cannot always restore clipped audio |
The microphone model can affect your preferred strategy. For instance, a broadcast dynamic microphone often rewards close, controlled placement, while a sensitive condenser may sound better with a little more distance. If you are deciding between popular podcasting options, this podcaster microphone comparison can help you consider how microphone sensitivity, working distance, and vocal technique interact.
Control airflow and recording levels
Good microphone technique reduces plosives before they reach your equipment. Rather than pushing air forcefully through every consonant, speak with a relaxed mouth and steady breath. You do not need to whisper or flatten your delivery; the goal is to avoid sending a concentrated jet of air toward the capsule.
Turning your head slightly for words with strong “P” and “B” sounds can help during voice-over sessions. Some speakers learn to direct those consonants toward the side of the pop filter while keeping the rest of the sentence aimed toward the microphone. This takes practice, but it is useful when a particular phrase repeatedly causes a problem.
Set the input gain so normal speech has healthy headroom. Recording too loudly can make a plosive clip the preamp or converter, creating permanent distortion. For digital recording, peaks around -12 dBFS to -6 dBFS are a sensible starting range for spoken content, though the exact level depends on your interface and workflow.
Do not try to solve a weak signal by placing your lips extremely close to the capsule and turning up aggressive compression. Compression can make quieter parts more even, but it can also raise the volume of breath and low-frequency bursts. Record a clean, stable signal first, then apply dynamics processing conservatively.
Reduce plosives during editing
When a plosive slips through, start by identifying the affected syllable and zooming into the waveform. Listen to the moment in context rather than judging it visually alone. Some large waveform peaks are harmless vocal emphasis, while others contain the obvious low-frequency thump associated with a burst of air.
A high-pass filter can reduce the deepest part of a plosive. Try a gentle setting below the normal fundamental range of the speaker’s voice, then increase it only as much as needed. For many spoken recordings, a filter somewhere between 60 and 100 Hz may help, but the right frequency depends on the voice, microphone, and recording style.
Targeted equalization is often more transparent than applying a heavy high-pass filter to the entire track. Use a narrow or moderately wide cut in the low-frequency area where the burst is strongest. Automating the EQ so it affects only the plosive keeps the rest of the voice warm and natural.
Clip gain is another reliable option. Lower the affected syllable by a few decibels before compression, or split the clip and reduce only the short burst. A short fade can remove a click created by editing, but fades that are too long may make the consonant sound clipped or unnatural.
Specialized de-plosive plugins can speed up repetitive work, particularly for long podcast episodes. They generally detect low-frequency bursts and reduce them automatically. Review their results carefully, since aggressive processing can thin the speaker’s voice, soften intentional emphasis, or create an audible dip at the start of a word.
Improve the recording environment
Room treatment does not directly stop a plosive, but it makes prevention and cleanup easier. A quiet, controlled space allows you to place the microphone farther away without capturing excessive reflections. This gives the air burst more time to disperse while preserving a clean vocal sound.
Hard surfaces can make breath and consonant energy feel sharper. Curtains, rugs, bookshelves, acoustic panels, and other irregular surfaces help control reflections. Avoid placing the microphone directly beside a bare wall or in the center of a highly reflective room if you need a natural spoken-word recording.
Monitor with headphones while testing. Record a short phrase containing repeated words such as “paper,” “baby,” “public,” and “podcast.” Move the microphone, change the angle, and adjust the pop filter until the bursts are controlled without making the voice dull.
If you record video, make your setup repeatable. Mark the boom arm, chair, or microphone stand position so you can return to the same distance for every session. Consistency reduces the amount of editing required across a series of videos or episodes.
A practical routine for cleaner speech
Use the following routine before pressing the record button:
- Mount a pop filter or foam windscreen and check that it sits between your mouth and the capsule.
- Angle the microphone slightly off-axis instead of speaking directly into its center.
- Keep a steady distance, usually around 10 to 20 centimeters, and avoid leaning toward the microphone.
- Record a test sentence with several “P” and “B” words while monitoring through headphones.
- Set gain conservatively, then use targeted EQ or clip gain for any remaining bursts.
Give yourself time to rehearse the first few lines. Plosives often occur because a speaker begins with excessive breath or leans forward at the start of a sentence. A short warm-up helps you settle into a consistent posture and vocal volume before the important take.
Review the recording at normal listening volume as well as with headphones. A plosive that seems minor when isolated may become distracting after compression, loudness normalization, or background music is added. Fixing the problem early keeps later processing from exaggerating it.
Make clean audio part of your setup
Eliminating plosives is rarely about buying the most expensive microphone. A modest microphone with thoughtful placement can produce cleaner speech than a premium model aimed directly at the speaker’s mouth. Start with airflow control, distance, and angle before changing equipment.
For a dependable workflow, combine a pop filter with off-axis placement, moderate gain, and a repeatable speaking position. Use editing tools as a final layer rather than the primary solution. This preserves natural vocal tone and saves time when producing podcasts, tutorials, livestreams, and voice-over projects.
Set up your microphone, record a short test, and compare the results after each adjustment. With a few minutes of experimentation, you can remove most explosive consonants before they reach the recording and publish speech that sounds clear, controlled, and ready for your audience.