Cat
Head of the Swing Shift
Putting a word to describe a sound is called:Posted by propeller:
I'd say, you can't really put words on animal sounds... and... err...
Basically it was probably invented by someone saying, "oh! I need some way to describe what noise a pig makes!"Onomatopoeia
The formation or use of words such as buzz or murmur that imitate the sounds associated with the objects or actions they refer to.
Thus, came about such words as oink and nöff.