How To Turn Off Facebook Notification Sounds?

Facebook have a feature that plays a sound everytime you receive a notification. Sometime, this is so annoyed. Fortunately, there is an easy way to turn off it.
Facebook Messenger already makes a sound whenever you receive a message (you can turn off chat sounds) but this feature makes a sound when you receive any notification. Here is how to turn that feature off, please do step by step:

First, you have to log in Facebook, please click here and log in:

Seconds, click here and go to Facebook Notifications Settings:

Finally, SOUNDS ~> Play a sound when each new notification is received ~> On ~> Off