To disable an output device on Windows 11, use these steps:

• Open Settings.
• Click on System.
• Click the Sound page on the right side.

• Under the "Output" section, click the Speakers setting.

• Under the "General" section, click the Don't allow button for the "Audio" setting.

• Click the Don't allow button again.

Once you complete the steps, Windows 11 will no longer play sounds on that specific set of speakers, headsets, or headphones.