My youngest child produces silly amounts of wax and as Dude says it effects her hearing. I think she was 12-14 months when I became worried about her declining diction. She's been having the ENT dig massive hunks of wax out of her ears every time her speech starts to devolve since that time.
My eldest has CAPD, so I guess I was hyper vigilant about early hearing issues, though my eldest had no signs, not a single ear infection and has exceptional hearing, especially in lower registers (which may be the cause of her CAPD, she hears more than other people, especially low rumble, and has trouble picking what to listen to).
