What type of sounds were hypothesized to be created when air was forcefully exhaled through the crest's internal tubing?

Answer

Deep, resonating, low-frequency sounds

When air rushes through the channeled nasal passages, it is hypothesized to create deep, resonating, low-frequency sounds capable of traveling significant distances.

What type of sounds were hypothesized to be created when air was forcefully exhaled through the crest's internal tubing?
paleontologydinosaurParasaurolophusCresthadrosaur