An update to the Teams Windows and Mac clients introduces automatic noise suppression for Teams meetings. You can tune suppression up or down to reflect your environment. The feature works by analyzing the audio feed from the microphone used in a meeting and removing unwanted noise. The more suppression is done, the more resources are used, so this is something to keep an eye on.
You can now enable noise suppression for Stream videos during the original upload or afterwards. Speech is isolated from background sounds to make it clearer and more distinct. You can apply noise suppression to lots of different videos, but you can’t to Teams meeting recordings because noise suppression is already done for those videos.