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

That obstacle is delaying our plans.

You cannot hinder his progress.

His speech sound is very attractive.

Phonetics is a part of linguistics that studies the physical, physiological, and psychological aspects of sounds.

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

This audio is very clear.

I am majoring in auditory phonetics at university.

Articulatory phonetics is a study about the production of speech sounds.

Acoustic phonetics is the study of the physical properties of speech.