I've recently figured out why listening to kpop helps me to concentrate. Cos I don't know what the words mean at all. hahaha. but I need songs with sounds which my brain can follow as proper sounds, and yet will not feel compelled to figure out the meaning of. in a way, engaging my brain such that it remembers the music and memorizes the words, helps me to concentrate on my tasks at hand. and it has to be familiar music, cos then my brain will settle into a kind of having background-sounds-behind-me kind of mode.