Which type of sound is classified as a Glide sound?

A glide sound is characterized by minimal obstruction in the vocal tract as it is articulated. In phonetics, glide sounds, such as /w/ and /j/, are considered semi-vowels and are produced with the mouth in a more open position compared to other consonants. This semi-vowel quality allows for smooth transitions between sounds, contributing to the fluidity of speech.

In contrast, the other types of sounds involve either significant obstruction or specific vocal qualities. Sounds that require significant airflow might include fricatives or voiceless consonants where airflow is more intensely restricted. Additionally, sounds that are classified as voiced involve the vibration of the vocal cords, but this does not specifically correlate with the glide classification. Finally, sounds produced with obstruction might refer to stops or other consonants that involve a complete blockage of airflow, which is the opposite of the glide category.