You can make noiseless voice chats using Krisp with Steam.
After you download and install Krisp, configuring with Steam is super simple.
1. Select Krisp as a microphone and speaker
Open Voice tab in Steam friends list settings and select Krisp microphone and speaker.
2. Mute the Noise
Choose the correct microphone in Krisp menu. Make sure that Mute Noise toggle is turned on in Krisp UI.
The "in use" indicator will be On if there is an ongoing voice chat.
3. Start a voice chat
Start and enjoy your noiseless voice chats with Steam.
Here's a quick video tutorial to help you along the way
Krisp with Steam on Mac
Krisp with Steam on Windows