Why Ctrl+num2 makes explosion sound on Alienware 17 R4?

Why Ctrl+num2 makes explosion sound on Alienware 17 R4 (win10)? It doesn't matter in which app i use this keys - in Illustrator (where i use them pretty often to lock elements), or just on Desktop - it still makes this loud sound of explosion, and i don't even get why. It doesn't seem that it makes something to anything, I tried to search in alienware soft stuff, but nothing - just color schemes for keyboard and macrokeys stuff.

Does anyone know how to turn it off and what it is?