Some web pages just automatically play loud, displeasing sounds. If you're the type who prefers browsing the web quietly and would like to shut any noise that will intervene in your work, then the Mute All extension would come in handy for you. 

With this extension installed on your browser, websites will be muted by default. Mute All will automatically block sounds from any tab unless you put the websites' domains on the Chrome Whitelist to permit sounds from these trusted sites. In addition, you don't need to save the whitelisted sites over again, as the extension keeps a record of them.