Volume feedback 'plop' sound missing in Yosemite?

If you have updated to Yosemite recently, you may be wondering where the 'plop..plop...' noise has gone that you used to hear when you pressed the volume up and down keys on the keyboard.
Well, Apple decided to make it an option now and turn it off by default. If you go in to System Preferences and then Sound options you will see a little tick box which needs ticking.
Once you do this you will be happy to know that the feedback noise has returned but with a new Yosemite sound. More of a short 'pop' sound.
See below.