An eardrum (or tympanic membrane) is a thin-shaped membrane that runs the percussion section in the human head. Many people think it is only possible to perforate one's eardum, but it is possible to fracture it too.
Excerpt from P.G. Wodehouse's Stiff Upper Lip, Jeeves" (1962)
"Bertie?"
"Oh, hullo, Aunt Dahlia."
There had been no mistaking that loved voice. As always when we converse on the telephone, it had nearly fractured my eardrum.
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