What was the function of the parasaurolophus's tubular crest?

Parasaurolophus is famous for its distinctive tubular crest, a hollow bony structure extending from the skull that can reach up to 1.8 meters in length. For a long time, the purpose of this unique feature remained a mystery. Recent studies using CT scans and computer modeling have revealed the internal structure of the crest. The research shows that the crest contains complex air passages capable of producing sound, similar to modern wind instruments. Computer simulations indicate that Parasaurolophus could generate low-frequency rumbles, which traveled great distances through dense forests, enabling long-range communication among group members.