So someone posted a question about drawing an oc, but it got deleted. this is what i drew from memory. the original had a gas mask, a gun, and quite a bit of winter gear. i absolutely tanked the mask, but it was in the name of necessity

The term is called adduction 

Musical notation is a system which is used to  visually represent music  pertaining to the ear  contend  with instruments or sung by the human voice through  the employment  of written, printed, or different symbols.in the western music tradition, the sound is represented in written form through musical notation.in musical notation, the pitch is indicated exclusively by the position of notes on the lines and spaces of the staff.