The sound was so quiet that I could hardly hear it.

This audio is very clear.

He is an expert in comparative linguistics.

Computational linguistics is the study of analyzing human language with computers.

I am very interested in sociolinguistics.

He can speak many languages.

He received the letter challenging him to a duel and began preparing for the duel.

He is an expert in orthoepy, teaching pronunciation.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.