How is the function of the crest in sound generation often compared?

Answer

A trombone player possessing an extremely long, curved slide

The crest is compared to a trombone slide because the air from the respiratory system is channeled through a much longer route inside the crest, modifying the sound produced.

How is the function of the crest in sound generation often compared?
paleontologydinosaurParasaurolophusCresthadrosaur