While Excel 2013 sports a sleeker, cleaner look than its predecessors and features updated Quick Analysis tools, it still shares many characteristics with Excel 2007 and 2010. Among them is audible feedback, an option that makes small dinging noises in response to your actions in the spreadsheet program. To disable audible feedback, you need only take a quick trip to Excel's Options menu, or you can disable all notification sounds at Windows 8's system level.
Access the "File" tab, located on Excel 2013's ribbon, and open the Excel Options menu. When the menu first opens, it presents you with a list of general options, as indicated by the column on the side of the dialog box.
Select "Advanced" from the options in the column -- you'll see it among options such as Formulas, Proofing and Language.
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Scroll to the option "Provide Feedback with Sound" and uncheck the check box next to this option to disable it.
Click the "OK" button to finalize your choice.