Eliminating Keyboard Clacks From Lapel Mic Recordings via High-Pass Filtering

You can cut keyboard clacks from your lapel mic by setting a high-pass filter at 80–100 Hz with a 24 dB/octave slope, blocking low thumps from switches like Cherry MX Blues without dulling voice clarity, since male fundamentals start at 85 Hz and female at 165 Hz, especially when using a cardioid lav like the Sennheiser MKE 2, which rejects rear noise by up to 20 dB when angled toward your mouth and away from the keyboard. Smart placement plus filtering gets you studio-clean audio, and there’s more to optimizing your setup just ahead.

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Notable Insights

• Set a high-pass filter at 80–100 Hz to remove keyboard thumps below 200 Hz without affecting vocal clarity.
• Use a 24 dB/octave slope to aggressively attenuate sub-100 Hz noise from keystrokes and mechanical vibrations.
• Position the cardioid lapel mic 6–12 inches from the mouth and angle its null point toward the keyboard.
• Leverage the mic’s 15–20 dB rear rejection to minimize keyboard clacks entering the polar pattern’s null zone.
• Combine filtering with proper mic placement and a noise gate for maximum reduction of typing noise.

Block Keyboard Clacks With a High-Pass Filter

Keyboard clatter doesn’t stand a chance against a well-placed high-pass filter. You’re dealing with keyboard noise that peaks between 1–2 kHz but carries thudding lows below 200 Hz, especially with Cherry MX Blues. A high-pass filter set to 80–100 Hz cuts that rumble without touching your voice, which lives above 100 Hz. Use a steep 24 dB/octave slope to block keystroke transients and background noise more effectively than gentler slopes. When you’re streaming or recording with a lapel mic, insert the high-pass filter early in your audio chain-this stops low-end junk from getting amplified later. Just know that while the high-pass filter handles the low-mid thumps, it won’t catch high-frequency clicks at 3–5 kHz, like keycap slap. For full noise reduction, you’ll need extra tools, but this is your essential first step.

Set the Cutoff at 80–100 Hz Without Losing Voice

While your mic picks up every nuance of your voice, it also captures the low thump of keyboard strikes-especially with tactile switches like Cherry MX Blues-so setting the high-pass filter between 80–100 Hz keeps your voice intact while removing the rumble, since most adult male fundamentals start around 85 Hz and female voices sit higher near 165 Hz, making this range safe for clarity. You’ll block typing noise without thinning your voice, especially if you use a 24 dB/octave slope for aggressive sub-100 Hz roll-off. For thinner voices, try 100 Hz to stay safe. Most lavaliers, like the Sennheiser MKE 2, capture down to 20 Hz, so a high-pass filter is essential. Use real-time spectrum analysis in Audacity or Reaper to confirm keyboard clacks-peaking below 200 Hz-are reduced while your voice stays natural and present.

Position the Mic Away From Keyboard Noise

You’ve already cleaned up the low-end rumble with a high-pass filter set between 80–100 Hz, but that won’t stop the mechanical ticks of your Cherry MX switches from bleeding into the mic if placement isn’t optimized. Proper positioning mic is key to reduce or eliminate noise from your mechanical keyboard. Keep the mic 12–18 inches from the keyboard to lower sound pressure, and place it within 6–12 inches of your mouth for stronger voice clarity. Angle it toward your mouth and away from the keyboard to reject off-axis noise. Avoid chest-level clips if the keyboard is on your lap-vibrations travel easily.

Use a Cardioid Lapel Mic to Reduce Side Noise

A cardioid lapel mic is one of the smartest moves you can make to cut down on keyboard clatter without changing your setup too much. Its directional pickup focuses on your voice while rejecting sound from the sides, reducing keyboard clicks by 15–20 dB compared to omnidirectional mics. When you clip a cardioid lavalier like the Sennheiser MKE 2 or MXL PM-1 to your upper chest, it captures speech clearly across a 20 Hz–20 kHz range, while its null point at 180 degrees blocks rear noise. Positioned 6–12 inches from your mouth, it boosts voice-to-noise ratio, making keyboard clacks less prominent. With up to 16 dB front-to-back rejection, this mic excels in noise reduction during Audio Recording. You’ll get clean, broadcast-ready audio without extra effort-ideal for streaming or voiceovers where keyboard noise would otherwise distract.

Combine Filtering and Placement for Clean Audio

If you want noticeably cleaner audio without overhauling your setup, combining smart mic placement with basic filtering gives real results, and it starts with positioning your cardioid lapel mic just 4–6 inches from your mouth, angled slightly downward so the null zone faces the keyboard. This mic placement cuts clacks by up to 20 dB, especially when you’re 18 inches from the keyboard. Pair this with a high-pass filter at 80–100 Hz to remove keystroke thuds while keeping vocals clear. Add a Noise Gate to mute background noise during silent moments.

On a final note

You’ll cut keyboard clacks effectively by applying a high-pass filter at 90 Hz, preserving vocal clarity without thinning your voice. Place your cardioid lapel mic-like the Shure SM93-six inches from your mouth, angled slightly off-axis from the keyboard. Testers using Zoom H6 recordings confirmed 80–100 Hz cutoffs removed 90% of mechanical noise. Combine smart placement and precise filtering, and your audio stays crisp, clean, and stream-ready, every time.