Which of the following does "phon/o" refer to in the context of medical terminology?

In medical terminology, "phon/o" is the combining form that specifically refers to sound. This stems from the Greek word "phony," which means voice or sound. It is used in various medical terms that relate to audible phenomena or the voice itself. For example, terms like "phonation" refer to the process of producing sound or voice. Understanding this root can help in deciphering many other medical terms that contain it, as it is commonly used in fields such as audiology and speech therapy, where sound is a critical component of study and practice.