Loud emergency whistle

I measured 117db on my watch with this whistle, maybe you can get it to go louder? No AMS, No supports needed. Best to print with .16 layer walls but .20 works decent too.  Key ring needs a little jig to get it on, but I wanted the keyhole to be supportive enough so it won't break off - it will go on though! Can also be used as a necklace as well.