Actually, sound could be used to carry out the death penalty. Sounds between 185 decibels and 200 decibels can kill you, either by making air bubbles enter your bloodstream or rupturing your lungs.

https://www.extremetech.com/defense/175996-can-a-loud-enough-sound-kill-you

🙂 Three cheers for knowledge! Let’s keep the cheers below 100 decibels—for safety