An oral learner or oral communicator is:

 

Oral communicator: A person who learns or processes information by spoken rather than literate means. Some oral communicators are so out of necessity because they cannot read or read with understanding. Other oral communicators can read with understanding and write, but they prefer non-print forms of communication.

 

Oral learner: A person whose mental framework is primarily influenced by spoken rather than literate forms of communication and who therefore learns primarily or exclusively by speech, song, etc.