I have been to Chicago.

The Paleogene period was a very important time in the history of the Earth.

He is an expert in paleography, and he is good at deciphering ancient handwritten documents.

I am learning Modern Greek.

By learning Pinyin, you can accurately understand the pronunciation of Chinese.

Velar sounds occur when the back of the tongue contacts the soft palate.

A lingual sound is a sound that uses the tongue when pronouncing.

Plosive sounds play an important role in linguistics.

This noise is interfering with my studies.

In phonetics, an obstruent is a sound that obstructs the airflow.