When closing a document window that hasn't been saved, ClarisWorks 3.0 displays the usual alert, but does not beep.
Exact steps to reproduce:
1) Open any ClarisWorks 3.0 document or new document.
2) Add some text, drawing or table.
3) Click the close box in the upper left corner of doc window.
4) You will get a dialog box asking you to save changes but there will be no audible warning tone.