Microphone too quiet
A quiet mic is a gain-staging problem: somewhere between your mouth and the app, the signal isn't being amplified enough — or something keeps turning it back down. The trick is to add gain as early in the chain as possible (distance and hardware first, software boost last), because late-stage boost amplifies noise just as much as voice.
Step-by-step fix
- Measure first: open the CheckMyMic microphone test and speak normally. The live meter and verdict show how quiet you actually are — repeat this after each step below so you know what helped.
- Get closer. Distance is the cheapest gain there is: halving the distance to the mic adds roughly 6 dB. Aim for 10–20 cm from a desktop mic; for a headset boom, position it just to the side of your mouth (not in front of your lips, not touching).
- Raise the OS input level to 80–100%: Windows — Settings → System → Sound → your mic → Input volume; macOS — System Settings → Sound → Input slider.
- Windows only: add Microphone Boost. Open Control Panel → Sound → Recording → your mic → Properties → Levels tab — Boost adds +10/+20/+30 dB on devices that support it. Use the smallest step that gets you there: every step also raises the background hiss.
- Turn up hardware gain: USB mics and audio interfaces have a physical gain knob that sits before everything else in the chain — the best place to add level. On an interface, speak while raising gain until the input LED flickers green/amber on your loudest words, never red.
- Stop auto-gain from fighting you: Zoom's "Automatically adjust microphone volume" and Discord's automatic input sensitivity can hold a mic down after a loud moment. Disable the auto option, set a manual level, and retest with the meter.
- Using a condenser mic on an audio interface? Switch on 48V phantom power — without it a condenser is extremely quiet or completely dead. (Dynamic mics don't need it and don't mind it on most interfaces.)
Frequently asked questions
How loud should my mic actually be?
Normal speech should push the mic-test meter well into its upper-middle range, with your loudest words approaching — but not slamming — the top. Peaks that hit maximum are clipping (distortion), and speech that barely moves the meter will be inaudible under any call app's processing. The test's verdict tells you which side you're on.
Does Windows Microphone Boost make quality worse?
It raises everything — voice and the noise floor together, and the +30 dB step often adds audible hiss. Treat it as the last resort: get distance and hardware gain right first, then add the smallest boost step that reaches a healthy level on the meter. If you need +30 dB, the mic is probably too far away.
Why does my mic start loud and get quieter during calls?
Automatic gain control. The app (Zoom, Discord, Teams all do it) turns you down after a loud moment — a cough, a laugh — and is slow to recover. Disable the app's auto-adjust setting, set a manual input level, and confirm with the mic test that your level now stays put while you vary your volume.
I've maxed everything and it's still too quiet — what now?
Some mics are simply low-output: dynamic mics in particular need far more gain than laptop mics or condensers, and an XLR dynamic may need an inline booster (FetHead/Cloudlifter style) before the interface. Compare against another mic in the CheckMyMic mic test — if a different mic is loud with the same settings, the quiet one is the limitation, not your setup.