Measure before adjusting
Start the microphone test, speak at your normal distance and record a sentence. If the meter barely moves and playback is faint, the input itself may be too low. If this recording sounds healthy but callers hear you faintly, check the microphone level or automatic gain setting inside their call app instead.
Move closer and aim correctly
A microphone several feet away captures a quieter voice and more room sound. Move it closer without putting it directly in the path of breath. Speak toward its intended pickup side; some desk microphones are side-address, while others are end-address. Check the manual when the capsule orientation is unclear.
Adjust one gain control at a time
Open Windows Settings → System → Sound → Input, select the correct microphone and adjust its input volume. If an audio interface or mixer controls the mic, set its hardware gain there first. Raise gain gradually while recording short clips. Too much gain can distort loud syllables; software gain cannot restore detail that was never captured.
Avoid solving one problem by creating another
A noise gate set too aggressively can make quiet speech disappear even when the microphone works. Temporarily disable optional voice processing in your recording software while troubleshooting. Compare the browser recording with the same sentence in that software. If the browser is clear but your recording is quiet, the difference lies in the app’s routing or filters.
On a Mac
Open System Settings → Sound → Input, select the microphone and move the input volume slider while watching the level meter. Some USB microphones ignore this slider and only respond to a gain knob on the microphone itself. If the meter barely moves even at maximum, the gain control is on the hardware.
A sensible target
Speaking normally, the level on our test should sit around the middle of the bar, with louder words reaching toward the end but not hitting it constantly. If you need the system slider at maximum and the microphone is still faint, look for a hardware gain control. A low-output dynamic microphone may need an interface with more gain or an inline preamp. Raising software gain also raises background noise, so fix distance and hardware gain first.
Further reference: Official device or browser documentation ↗
How much distance changes the level
Sound from your mouth spreads out as it travels, so the level reaching the microphone drops quickly with distance. Each time you double the distance, the level falls by about 6 dB, roughly half the signal amplitude. That is why moving closer is often more effective than turning up gain:
| Mouth-to-mic distance | Level compared with 5 cm |
|---|---|
| 5 cm (2 in) | 0 dB (reference) |
| 10 cm (4 in) | about −6 dB |
| 20 cm (8 in) | about −12 dB |
| 40 cm (16 in) | about −18 dB |
Moving closer also lowers the room echo and background noise relative to your voice, which raising the gain cannot do.
Where to find the gain controls
- Windows 11: Settings → System → Sound → choose the microphone under Input → Input volume. For more control, open Control Panel → Sound → Recording tab → your microphone → Properties → Levels. Some drivers add a Microphone Boost slider there, in +10 dB steps.
- macOS: System Settings → Sound → Input → Input volume.
- Audio interface or mixer: the physical gain knob is the main control. Set it here first and leave the computer slider near the top.
Common questions
Is Microphone Boost safe to use?
Yes, but each step also raises background hiss. Use the smallest boost that gets your voice into the middle of the meter.
Why is my mic quiet only in one app?
Many call apps have automatic gain or their own input slider. Check the app's audio settings, or turn off automatic adjustment and set the level by hand.
Reviewed October 2026 · How we write our guides · Suggest a correction