Now... you might be thinking "Wait, isn't Hunger capped at 20?" Well... normally, yes. However...

https://www.curseforge.com/minecraft/mc-mods/scaling-feast

This mod here allows you to increase your max hunger beyond 20 by eating Hearty Shanks or if you have certain other mods installed, such as Spice of Life: Carrot Edition which allows you to increase max hunger after eating a certain number of food types. There's also attributes for increasing or lowering max hunger.

I was wondering if it would be possible for a way for the Hunger Threshold to hook into Scaling Feast, like if you had the config set at 0.2 for the Hunger Thershold you'll hear the sound effect at 4/20, 8/40, 20/100 Hunger, etc.