Microphone · Display & Sound

Reduce keyboard clatter, fan noise, and room hum without a physical treatment change

Noise suppression uses software processing to reduce steady background sounds — fan noise, keyboard typing, HVAC hum — while trying to preserve your voice. It's available at the OS level on both Windows and macOS, and separately inside most call and streaming apps, which can sometimes be layered but shouldn't be over-applied.

What you should know

  • Windows: Settings → System → Sound → Input → device Properties → enable "Noise suppression" (or in some builds, Settings → System → Sound → "Microphone noise suppression" with Low/Medium/High options).
  • macOS: System Settings → Sound → Input → enable "Voice Isolation" or the microphone mode selector, or use "Background Noise Removal" if listed for your input device.
  • In-app: Zoom (Settings → Audio → "Suppress background noise," with Low/Medium/High/Auto levels), Discord (User Settings → Voice & Video → Noise Suppression), and OBS (Filters → Noise Suppression on the audio source) all offer their own independent controls.
  • Avoid stacking OS-level and app-level suppression at their highest settings simultaneously — combined aggressive suppression can make voices sound processed, robotic, or clipped during pauses and breaths.
  • Test suppression with the actual background noise present (fan running, typing) rather than in a silent room, since the effect is only obvious once there's something to suppress.

Why it matters

Noise suppression can meaningfully improve how you sound on calls and recordings without buying acoustic treatment, but set too aggressively it introduces its own artifacts — understanding where it lives at both the OS and app level avoids double-processing that makes voices sound unnatural.

Best practices

  • Prefer a single layer of suppression (OS or app, not both) set to a moderate rather than maximum level as your starting point.
  • Combine light noise suppression with basic acoustic improvements — a softer room, mic positioned closer to your mouth — rather than relying on suppression alone to fix a noisy environment.
  • Turn suppression off temporarily when troubleshooting other audio issues, since heavy suppression can mask or distort the true source of a problem.

Common problems and fixes

Voice sounds robotic, choppy, or cuts out during quiet parts
Lower the noise suppression level, or disable it at whichever layer (OS or app) is set higher, since this is a classic sign of over-aggressive processing.
Background noise is still audible despite suppression being enabled
Confirm suppression is enabled at the layer actually being used for that call (OS setting won't help if the app has its own separate toggle set to off), and increase the level incrementally.

Tips and tricks

  • If persistent background noise remains a problem after trying suppression settings, a simple physical fix — closing a door, turning a fan away from the mic, or adding soft furnishings behind you — often outperforms further software processing.

Frequently asked questions

Does noise suppression reduce audio quality for my voice too?

At moderate settings, most modern noise suppression preserves voice clarity well; pushed to maximum, it can introduce a slightly compressed or synthetic quality, especially on louder or more dynamic speech.