I am interested in finding out how the phonetic part in Chinese characters affects the pronunciation of these characters. In particular, I am interested in finding possible patterns or rules that relate to (historical) phonemic changes, existing or defunct dialects or other phenomena.
It is well known that the phonetic indicates *approximately* the pronunciation in about 90% of all Chinese characters. Early Western compendia of chinese characters were often arranged by these phonetic parts rather than the radical.
I would be very grateful to the community for any remarks (even concerning adjacent fields), suggestions for sources or any ideas you might have about this question.
EDIT: One first useful point from this discussion is to distinguish between modern and pre-simplification character variants.