Part of having a modern smartphone is the media experience. Today's Android phones rival about any desktop system when it comes to audio and visual cues for the way you interact with them. Case in point -- audible alerts for system UI actions.
Making your Android phone or tablet give you an affirming "tick" when you press a button or unlock your screen is easy. Open your settings, and find the "Sound" entry in the menu list. You'll see something like the above, where you can set the standard ringtone and notification. If you scroll down a bit you'll see where you can enable or disable the audible prompt when doing things like dialing a number, or unlocking your phone. What's really cool is that you can set these sounds individually, so your phone only makes the noises you want it to make.
Once you have things set up the way you like, just press the back button and leave the settings menu. Now you're set!