Continuous Background Noise

Hi Aravinth M,

I understand how frustrating it is when your microphone produces a continuous fan‑like noise in Teams Web, especially during work or class sessions. Since the Teams desktop app sounds normal, it’s reasonable to wonder if the issue lies with the web version. That said, I need to clarify a few points so expectations are clear:

First of all, Microsoft Q&A is a user‑to‑user support forum, with no access to internal or backend documentations. Contributors here do not have the ability to confirm whether this is a known issue, as there are currently no Microsoft or other official articles mentioning this exact problem.

Secondly, one important detail from your testing is that the same noise occurs on mictests.com. This means the issue is more likely to go beyond Teams, relating to how the browser captures microphone audio or how the browser interacts with your local audio driver or device. Here are a few more checks you can try to narrow down the cause:

• Turn off browser graphics acceleration (unlikely but sometimes this can affect audio stream):
  • On Edge > enter to address bar: edge://settings/system/manageSystem
  • Toggle off Use graphics acceleration when available (or on if it's already off)
  • Test the mic sound again and if nothing improves, you can revert this change.
• Test with another browser (e.g. Firefox), since Edge and Chrome are both Chromium‑based.
• Try another meeting app and its web version, such as Zoom, to see if the behavior repeats.
• Use a USB headset / separate microphone (3.5mm jack is not favoured on newer devices)
• Check for audio software (Realtek Console, Lenovo, Waves...) > disable / uninstall to test.
• Change the microphone format:
  • On your Taskbar tray, right-click sound icon > open Sound settings > Input section
  • Choose your microphone > Input settings > Format > try another available format
  • Test the microphone again in Teams Web / mictests.com with each format option.

Teams Web and the desktop app don’t always use the same audio path or processing. The desktop app may be suppressing or filtering the noise, while browser‑based capture still picks it up.

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