I chose to do "you" and "me" icons because this may depend on whether you are teaching your students to regualte their voice themselves or if you plan to move it up and down yourself.
Also included in this bundle are three flashcards represnting the different levels. I did this to provide a non-verbal prompt to the students when they are being too noisy. I find it unaffective to yell over an already loud student!
If your interested in implementing the visual in your room, you can purchase it HERE.