Fyi this Jam prohibits any use of voice, talking even any type of text which may be displayed inside the game
It says spoken language so effort sounds surely wouldn't count under that.
Oh shoot, my mistake sorry, I can't believe I completely missed that when looking through the event page. After rereading it, I now see that. Thanks for informing me.
You can definitely do grunts, "Simlish" type stuff, or... or... or... beatboxing?