Correct me if I am wrong but I believe sound should be differentiated from other waves as traveling through a physical medium of atoms as opposed to a fundiment

Correct me if I am wrong but I believe sound should be differentiated from other waves as traveling through a physical medium of atoms as opposed to a fundimental field. Under this definition the following sentence quote makes sense. > the speed of sound is dependent on two dimensionless fundamental constants: the fine structure constant and the proton-to-electron mass ratio.