I just upgraded to SSMS 18.4 and now when I'm tabbing in my table columns, every time I get a Windows "ding" sound.

A few people have this issue, please see here:
https://www.reddit.com/r/SQLServer/comments/e6pfb7/tabbing_in_ssms_dings/

Every time you are in the table designer and hit "tab", you get a windows "ding" sound, even if you do not change anything.  really annoying!