According to your description, I have the following questions to confirm with you:
- Do all attendees or specific users have such a problem?
- Does the web client have the same problem?
- Will there still be noise when you try to mute the system?
Audio quality will be based on the bandwidth of all parties joining the call/meeting, refer to this article to optimize your network:
https://learn.microsoft.com/en-us/microsoftteams/prepare-network#network-optimization
Besides, if your computer is running a lot of applications, you may experience issues with sound quality, like lagging or cutting out. If this happens, closing other applications can help.
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