Parasaurolophus: The Sound Communication Expert of Hadrosaurs

Parasaurolophus is detailed in entry 10; this section highlights the latest research. New CT scans and 3D-printed models confirm the crest's acoustic function. Researchers created precise replicas of the internal crest passages and tested sound production by blowing air through them. Results show Parasaurolophus could generate low-frequency sounds between 50 and 200 Hz, capable of traveling hundreds of meters through dense forests. Crest size varied with age, producing different frequencies, likely allowing group members to identify each other's age and sex by sound.