Call me a grump, but whenever I hear AOL's chirpy "You've got mail," I feel a migraine coming on. If I want to check my mail, I can do it without AOL's prompting, thank you very much.
Good thing there's an easy way to tell it to pipe down. Log onto AOL, and on the AOL toolbar, select Settings → Preferences and click Toolbar & Sound. At the bottom of the dialog box, uncheck the line "Enable AOL sounds such as the Welcome greeting and Instant Message chimes" box. Click Save, and the next time you check your mail, you can do so in blessed silence.