How to reduce background noise in a call center
Clearer customer calls come from several small improvements working together: microphone placement, sensible input gain, a quieter workstation, and real-time noise cancellation. This guide explains how to diagnose the noise and improve the complete audio path.
“Background noise” is several different audio problems
Treating every unwanted sound the same leads to disappointing results. Listen to a short recording from the agent’s actual dialer and identify what dominates. A steady ventilation hum behaves differently from a nearby conversation, sharp keyboard clicks, or room echo.
Nearby agents
Human speech is the hardest distraction to remove because it resembles the wanted voice. Microphone direction and distance are especially important here.
Keyboards and desk impacts
These are short, changing sounds. Move the keyboard away from the microphone’s pickup axis and avoid placing the headset cable or microphone against the desk.
Ventilation and equipment hum
Steady noise is usually easier to reduce, but excessive microphone gain can make a quiet fan sound much louder to the customer.
Speaker echo
If the remote caller is played through speakers, their voice may leak back into the mic. A headset removes most of that physical path; echo cancellation is the software fallback.
Reduce call center noise before and after it reaches the microphone
Use a boom headset and position it consistently
Place the boom near the corner of the mouth, not directly in front of the lips where breath noise is strongest. A close wanted voice gives every later processing stage a better signal to work with. Mark or demonstrate the correct position during agent onboarding.
Set microphone gain deliberately
Automatic gain can raise the room whenever the agent pauses. Start with a moderate fixed level where normal speech is clear, then verify quiet and loud voices. Avoid solving a placement problem by simply turning the microphone up.
Improve the workstation and room
Increase spacing where possible, avoid seating agents face-to-face, keep noisy equipment away from microphone booms, and use absorptive partitions or soft surfaces to reduce reflections. Operational changes reduce noise without altering the agent’s voice.
Add real-time noise cancellation
A system-level noise cancellation app cleans the microphone before it reaches the dialer. This is useful when teams use more than one calling platform because the same virtual microphone can be selected across those apps.
Configure one clean audio path from headset to customer
Kleervox runs on the agent’s computer and exposes the cleaned result as a virtual microphone. It does not require a plugin for each calling platform.
- 1
Select the physical headset
In Kleervox, choose the headset microphone—not the laptop mic and never the virtual Kleervox microphone itself.
- 2
Choose a sensible cancellation strength
Begin at the default level. Increase it only after a test call shows that the agent’s voice remains natural during fast speech, interruptions, and short acknowledgements.
- 3
Select “Kleervox Microphone” in the call app
Set it as the input in the dialer, Zoom, Google Meet, Microsoft Teams, Discord, or another application. Keep the agent’s real headset selected as the listening device.
- 4
Avoid unnecessary processing stacks
If the call platform also applies aggressive suppression, compare it on and off. Two strong suppressors in series may remove more noise but can also clip word beginnings or gate quiet speech.
- 5
Record a repeatable quality check
Use the same spoken script and background condition for each headset or setting. Compare intelligibility, voice naturalness, nearby speech, keyboard sounds, and silence between phrases.
Verify the result in a real call, not only in system settings
The final dialer may apply its own gain, codecs, and suppression. A local meter can look healthy while the customer still hears a poor signal, so validate the end-to-end path.
- The boom microphone stays close to the corner of the agent’s mouth
- Input gain is high enough for speech but not unnecessarily high
- The correct physical headset is selected in the cleaning app
- Kleervox Microphone is selected in the dialer or meeting app
- A test call confirms nearby speech and keyboard noise are reduced
- The agent’s words remain natural during double-talk and quick responses
- The same test is repeated after headset or desk changes
Call center background noise FAQ
For a deeper explanation of the processing itself, read how AI noise cancellation works. If your agents run Linux workstations, see noise cancellation for Linux.
How can I reduce background noise in a call center?
Start with a close-positioned boom headset, lower unnecessary microphone gain, separate agents where practical, soften reflective surfaces, and enable real-time noise cancellation. Test the complete path inside the actual calling software before rolling the setup out.
What type of headset is best for a noisy call center?
A wired or wireless headset with a directional boom microphone is usually easier to control than a laptop or webcam microphone. The boom should remain close to the corner of the mouth, and the input gain should be only high enough for clear speech.
Why can customers still hear nearby agents through a noise-cancelling headset?
Nearby voices are difficult because they resemble the agent’s own speech. Headset microphone direction, distance, room layout, and software suppression all matter. No single layer can guarantee complete removal without affecting voice quality.
Should I use both the call app and Kleervox noise cancellation?
Begin with one primary suppression layer. Stacking multiple aggressive noise removers can make speech sound gated or unnatural. Compare a test recording with each setup and keep the combination that preserves the agent’s voice best.
Does echo cancellation help with call center background noise?
Echo cancellation solves a different problem: the remote caller’s voice playing through speakers and returning through the microphone. Headsets usually prevent that acoustic path, while noise cancellation targets keyboards, ventilation, chatter, and other room sounds.
Test noise cancellation with your own microphone
The browser demo lets you combine your microphone with sample background sounds and compare original versus cleaned audio before installing the desktop app.
Try the browser demo