The eardrum is read as how sensitive you are to what you hear. A burst eardrum suggests that something said was simply too much to take in.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.