I'll be honest, it's like nails on the chalkboard to me, the Facebook notification sounds. Make it stop, is what my brain shouted, so I found out how.
Recently, Facebook started rolling out a new "feature" that plays a sound every time you receive a notification. Luckily, there's an easy way to turn it off.
Facebook Chat already makes a sound whenever you receive a message, but this feature makes a sound when you receive any notification. Here's how to turn that feature off:
This has been rolling out since November, and not everyone has the feature yet. However, this setting affects Facebook Chat's notifications too, so everyone should have it. If you haven't gotten the new "feature," you can still head into the settings now and turn it off before it rolls out to you.