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How to fix unwanted background noise in your USB headset

  • Updated

Using a USB headset allows you to make professional-quality calls with your phone application. However, electrical interference can sometimes cause an unpleasant background noise (crackling, humming or buzzing). In this article, you will learn how to identify and permanently eliminate this background noise to restore optimal audio quality during your calls. 

 

⚠️ Important : This issue is not caused by a software bug or a faulty driver, but by electrical interference in the audio signal (known as "Ground loop noise" or static noise). It manifests as crackling, a constant hissing or humming in your USB headset. 

 

1. Plug your computer into a grounded power outlet

The electrical connection is the most common cause of ground loops. To discharge these parasitic currents: 

  1. Locate a wall outlet equipped with a metallic ground pin. 
  2. Avoid using low-end extension cords or power strips without grounding. 
  3. Plug your computer charger directly into this grounded wall outlet. 
  4. Check if the noise persists by listening through your headset.

 

2. Use a powered USB hub or a signal isolator 

If you are on the go or if you do not have access to a grounded outlet, you must physically isolate the audio signal: 

  1. Obtain an external USB hub with its own AC power adapter, or a USB noise filter (ground loop isolator). 
  2. Connect the hub or filter to a USB port on your computer. 
  3. Plug your USB headset directly into this powered hub or filter. 
  4. Test the audio to ensure the noise has disappeared. 

 

3. Change USB port or use an adapter 

Internal computer components (motherboard, fan, processor) can generate interference in close proximity to USB ports: 

  1. Unplug your USB headset from the current port. 
  2. Choose a USB port further away from areas of high heat or the device fan. 
  3. Use a USB-C to USB-A adapter if your computer has newer, better-insulated USB-C ports.

  4. Avoid placing your headset cable in close proximity to other power cords.

     

4. Enable software noise reduction

If static persists, you can use software filters to reduce the background noise heard by your callers:

  1. Open the audio settings in your communication application (such as Ringover). 
  2. Locate the option for ambient noise reduction or background noise suppression. 
  3. Enable this option to filter out unwanted frequencies.
  4. Adjust sensitivity if necessary to maintain a clear voice.

 

🛠️ Quick test method to identify the source of the noise 

To confirm that the noise is electrical in origin, perform this simple test: 

  1. Open voice recording software (such as Audacity or Windows Voice Recorder). 
  2. Record your voice under 3 different conditions: 
    • Condition A : Laptop running solely on battery power. 
    • Condition B : Laptop plugged into power with a grounded outlet.
    • Condition C : Laptop plugged into power without a grounded outlet (e.g., an old power strip without a ground pin). 
  3. Listen back to the recordings to compare sound quality. 
  4. If the noise disappears on battery power or with the grounded outlet, the electrical origin is confirmed. 

 

Best practices and long-term prevention

  • Opt for certified professional headsets featuring better shielding against magnetic and electrical interference. 
  • Keep your system drivers up to date (in particular BIOS and USB controllers) to ensure stable system audio processing. 
  • Avoid congested electrical environments by limiting the use of overloaded power strips or poor-quality cabling near your workstation.

 

🎉 You now know how to identify the source of interference and set up your connections to eliminate background noise from your USB headset, guaranteeing clear, disturbance-free professional calls!