Start by measuring your noise floor
Before you change anything, find out how loud your background actually is. Sit in your normal spot, stop talking, and look at the level your mic picks up in silence. That reading is your noise floor, and it is the number every fix below is trying to push down. If you do not have a meter handy, run a quick mic test in your browser to see and hear exactly what your microphone is sending when nobody is speaking.
Measuring first matters because it tells you what kind of noise you have. A steady hiss or hum (a fan, an air conditioner, a computer) is constant and lives underneath your voice. A sudden clatter (a keyboard, a mouse click, a dog) is intermittent and happens in the gaps. Those two problems need two different tools, and mixing them up is why a lot of people never quite get clean audio.
Fix the room and the mic first
Software cannot fully undo noise that never had to reach the mic. Spend five minutes on the physical side before you touch a single effect:
- Get closer. Moving your mouth nearer the mic lets you turn the input gain down, which drops the whole background with it. Proximity is the single most effective noise fix there is.
- Point away from noise sources. A directional mic rejects sound from behind it. Aim the back of the mic at the fan, the window, or the PC tower, not at your mouth.
- Turn off what you can. A desk fan, a mechanical keyboard, a rattling case fan: silence the obvious offenders instead of asking software to erase them.
- Soften the room. Hard walls bounce sound around and add a hollow tone. Curtains, a rug, or anything soft nearby calms that down and reduces the echo that often rides in with noise.
If what you are hearing is your own voice bouncing back rather than steady room noise, that is a separate problem: see how to fix mic echo.
Noise gate vs noise suppression: the real difference
These two get confused constantly, and they do opposite jobs. Getting the distinction right is most of the battle.
A noise gate is a switch. When the incoming sound drops below a threshold you set, the gate closes and mutes the channel completely; when you speak above that threshold, it opens again. A gate is perfect for the gaps: between sentences, when you are not talking, it delivers dead silence instead of a low background hum. What a gate cannot do is clean up the noise while you speak, because the moment the gate is open, everything under your voice comes through with it. Set the threshold too high and it chops the quiet ends of your words; too low and it never closes.
Noise suppression is smarter. Instead of switching the whole channel on and off, it separates the noise from the voice and turns the noise far down continuously, even while you are talking. Steady hiss and fan hum get pulled down and your voice stays. This is the tool that keeps you clean mid-sentence, exactly where a gate is useless.
In practice you use both together: suppression to turn the constant noise far down under your voice, and a gate to guarantee true silence in the pauses. They stack, they do not compete, and which one you put first is a judgment call rather than a rule.
Cut the low rumble with a high-pass filter
A lot of what makes a mic sound muddy lives below your voice: desk thumps, footsteps, HVAC rumble, the low hum of a room. A high-pass filter (sometimes called a low-cut) lets everything above a chosen frequency pass and rolls off everything below it. Set it somewhere around 80 to 120 Hz and you throw away rumble your voice does not need, without thinning out how you sound. It is a set-and-forget cleanup that makes both the gate and the suppression work better, because they no longer have to fight the low-end junk.
How Patchd handles it, free on every input channel
Patchd is a virtual audio mixer for Windows, and every input channel carries its own effects rack, a stack of processing tools you build up from a + Add Node menu. The three tools above are all in the free tier, in every one of those racks, running in real time as you talk.
- Noise Suppression, the AI cleanup node, turns steady background noise far down while you keep speaking. It has one honest Mix control: blend from none to full so you can dial in exactly as much as you need instead of over-processing your voice into something robotic.
- Gate closes the channel in the pauses, so the quiet moments are actually quiet.
- High-pass rolls off the low rumble before it ever hits the rest of the chain. It is a node of its own, the first one in the rack above, and the parametric EQ, a tool that turns chosen frequencies up or down, can do the same job: a new EQ starts with a High Pass band at 80 Hz.
Because it is a rack, order matters and you control it: high-pass first to remove rumble, suppression next to turn the steady noise far down, then the gate to close in the pauses. A compressor after them, as in the rack above, evens out your loud and quiet parts. It all runs live, so you hear the cleaned-up result in real time rather than recording blind and hoping.
Send the clean signal wherever it needs to go
Once your mic channel is clean, Patchd sends that processed sound to any destination with a single click on a colored pill: your headphones so you can hear it, and a bus, a virtual output that other apps see as a microphone. Pick the Patchd bus as your microphone in Discord or OBS and everyone on the other end hears the cleaned-up version, not the raw fan-and-keyboard mix your microphone started with. If you want a walk-through of that routing, see how to route audio per app.
A quick order of operations
- Measure your noise floor with a mic test so you know what you are fighting.
- Fix the physical stuff: get closer, turn the gain down, silence the obvious sources.
- High-pass to remove low rumble.
- Noise suppression to clean the steady noise while you talk.
- Noise gate to keep the pauses silent. Running it after suppression hands it a quieter floor to judge; running it first means suppression only ever works on your voice. Either way round is defensible, so set the threshold against the meter and listen to the quiet ends of your words.
Do those in order and most microphones end up sounding dramatically cleaner, no expensive gear required. Patchd puts all three effects on every input channel for free, and it is in development now. You can try it now in the open beta.