Or just turn off sound notifications for emails in settings.
Does it really make sense that it takes so much effort? These are otherwise such effortless machines; it just seems weird that I can't make this part of using them easier.
You solved your "problem" in a Google search, but used this article as a trojan horse to soap box about two unrelated tangents. My note was for everyone here who was wondering how to fix it, but weren't willing to look in the second lines of the sixth paragraph.