💡 If a sound feels like it "squeezes" the air (like "ssss") it’s an obstruent; if it feels smooth (like "mmmm"), it’s a sonorant. Advanced Phonological Features

They are marked by the presence of noise or silence during the constriction phase.

They produce a significant increase in air pressure inside the mouth compared to the surrounding air. Obstruent vs. Sonorant

A combination that begins like a stop and releases into a fricative (e.g., /tʃ/ as in "church," /dʒ/ as in "judge"). Key Characteristics