Mouth noise reduction before recording a speech comes down to controlling saliva, reducing friction in the lips/tongue, and aiming the microphone so it “hears” less of what you can’t fully prevent. A reliable routine is: hydrate early (not right at the mic), avoid drying/filmy foods and drinks, prep your mouth gently, then record slightly off-axis with short reset breaks.
What “mouth noise” actually is (so you can target it)
Most annoying clicks, smacks, and crackles are tiny mechanical sounds: saliva strands breaking, lips separating, the tongue releasing from the palate, or a dry mouth rubbing during consonants. A sensitive mic placed straight in front of your mouth will capture those micro-sounds the same way it captures speech—so the routine is about (1) saliva consistency, (2) surface lubrication, (3) timing, and (4) mic pickup.
A practical routine (built around timing)
2–3 hours before: set the conditions
Hydrate steadily. Drink water normally over the afternoon or evening, not all at once. Chugging right before you record often creates more swallowing sounds and “wet” clicks.
Avoid dehydrators and irritants.
- Alcohol (drying + affects articulation)
- Very salty snacks (pull moisture from tissues)
- Spicy foods (can increase throat clearing)
- Very sugary foods (can leave a sticky film)
Plan a “clean mouth” meal. If you need to eat, choose something that doesn’t coat your mouth (think simple carbs/protein, low sugar, low oil). Greasy foods can leave a residue that increases lip noise and smacking.
Check the room air. Overly dry air can make mouth friction worse. If the room feels dry, raise humidity modestly (e.g., a small humidifier) and give it time to stabilize. Don’t aim for “steamy,” just “not desert.”
60 minutes before: reduce film and stabilize saliva
Warm water, small sips. Room-temp or slightly warm water helps some people avoid the “tight mouth” feeling without triggering excessive saliva.
Gentle mouth reset (2 minutes).
- Rinse with water (swish lightly, then spit)
- If you use mouthwash, avoid strong alcohol-based formulas right before recording (they can dry tissue and leave a taste that encourages swallowing)
- If you brushed recently, do a quick water rinse to remove toothpaste foam residue (residue can contribute to smacks)
Lip prep. If your lips get dry, use a tiny amount of plain lip balm well before you step to the mic. The goal is to prevent cracking sounds, not create glossy “sticky” lip separation. If it feels tacky, wipe most of it off.
15–20 minutes before: “quiet articulation” warm-up
You’re not warming up for volume—you’re warming up for smooth, low-friction movement.
Do a low-noise articulation set (3–5 minutes):
- Closed-mouth hums (gentle, steady airflow)
- Soft “vvv / zzz” to keep airflow consistent
- Slow consonant transitions (light contact): “lee–ree–nee,” “vee–zee–dee,” “mee–nee–lee”
Avoid aggressive tongue clicks or exaggerated lip pops. Those can “train in” the very sounds you want to reduce.
Practice silent resets.
- Learn to pause with your mouth slightly open and jaw loose (reduces lip sticking)
- Swallow before you start a sentence, not mid-phrase
- Take breaths through the nose when possible (mouth breathing can dry tissues faster)
5 minutes before: the “at the mic” setup that prevents clicks
Go off-axis. Don’t aim your mouth directly into the capsule. Angle the mic about 30–45 degrees off to the side or slightly above/below lip level, and speak past it. This reduces direct capture of lip/tongue micro-sounds while keeping speech clear. (help.rode.com)
Increase distance a little, then set gain properly. Being extremely close magnifies mouth noises. A small step back often helps more than any “trick,” as long as you adjust gain so you’re not whispering into a boosted preamp.
Use a pop filter or windscreen (even for speech). Plosives and breath blasts trigger edits and retakes, and retakes increase mouth fatigue (which increases mouth noise). A simple filter reduces that cycle.
Do a 10-second test recording and listen for clicks. If you hear clicks clearly in the test, they will be worse in a full read. Fix it now with mic angle/distance before you start.
The “during recording” micro-routine (what you do between takes)
Between paragraphs: 10–20 seconds of maintenance
Reset with a small sip, then wait. If you sip water, don’t immediately start talking. Give it 10–15 seconds so you don’t record the swallow, lip wetness, or initial “wet clicks.”
Jaw and lips relaxed. A tense jaw increases lip sticking and tongue friction. Drop the jaw, lightly roll the shoulders, and restart.
Controlled pausing beats fast restarting. If you stumble, pause, relax the mouth, then begin the sentence cleanly. Rapid restart tends to create extra smacks and lip separation sounds.
Food/drink tactics: what helps vs. what often backfires
Usually helpful
- Plain water, small sips
- Room humidity in a comfortable range
- A non-sticky mouth feel (clean rinse, minimal residue)
Often problematic right before recording
- Milk/dairy for some people (can feel coating and prompt throat clearing)
- Coffee (can dry you out and increase mouth dryness; also encourages frequent swallowing)
- Sugary gum/candy (sticky film)
- Very cold water (can tighten tissues for some voices)
About the “green apple” trick
Some voice professionals report that tart green apple can temporarily reduce mouth clicks, likely by changing saliva feel and cutting residue. It’s not guaranteed, and it can be short-lived—treat it as optional and test it before a real session, not during one. (Gravy For The Brain)
Technique adjustments that reduce mouth noise without changing your voice
Lighten consonant contact. Most mouth clicks aren’t from vowels; they happen during starts/stops. Use less “sticky” lip closure on P/B/M and less forceful tongue release on T/D/K/G.
Slightly slower starts. Many clicks happen right at the beginning of sentences when the mouth is closed, saliva pools, then you “pop” open. Start with a gentle onset: tiny breath, then speech.
Keep consistent airflow. Clicks stand out more when airflow is choppy. Even speech should ride on a steady, quiet breath stream.
Quick troubleshooting checklist (when clicks suddenly get worse)
- Room got drier (heater/AC kicked on)
- You moved closer to the mic
- You’re rushing restarts
- You ate something oily/sugary recently
- You’re over-sipping and recording immediately after
- You’re fatigued (mouth and tongue coordination gets “noisier” as you tire)
If you can’t fix it in 2 minutes, stop for 5 minutes, drink a little water, and reset. Mouth noise often spikes when you try to brute-force through it.
What not to do (common “fixes” that create new problems)
- Overusing mouthwash right before recording (drying, residue taste, more swallowing)
- Constant gum chewing (jaw fatigue, saliva swings; also creates its own noises)
- Recording extremely close and trying to “edit it out later” (you’ll spend more time repairing than recording)
(Software tools exist, but if your goal is a before-recording routine, the best return is preventing the noise at the source and capturing it less directly.) (izotope.com)
Why does this matter
Mouth clicks are distracting in speech and can make even high-quality content sound amateur, while also multiplying editing time and retakes.
Sources
- RØDE Support: microphone angle/off-axis technique and mouth noise capture (help.rode.com)
- iZotope RX: “Mouth De-click” overview (what counts as mouth noise and how it’s typically handled) (izotope.com)
- FilmSound.org Q&A: practical notes on mic positioning to reduce mouth clicks (filmsound.org)
