Korean uses a lot of mimetic words like these and we will be doing some future posts on some of them. These are close related to onomatopoeia so check those out as well. If you want to study even more and improve your Korean, check out our ebooks over at the Dom & Hyo Store.
Some great books to get your started are Korean Made Simple: A beginner's guide to learning the Korean language and Become a Hangeul Master: Learn to Read and Write Korean Characters
Check out our Dom & Hyo ebooks below.