paleontologist Dr. Julia Clarke of the University of Texas explained that instead of open-mouthed roars, scientists theorize that many dinosaurs may have produced closed-mouth vocalizations.

It’s also possible that dinosaurs sounded like a mash-up between birds and crocodilians. Habib says they might have been able to make open-mouth sounds like birds and closed-mouth crocodilian ...

Collectively, these studies point to the same conclusion: that theropod mouth anatomy ... in their open mouths. Combined with scaly lips, our findings suggest that predatory dinosaurs may have ...

One part that forms the base of the ankylosaur’s larynx was very large compared to those of other animals, suggesting that this dinosaur could open its ... from the mouth and nose to possibly ...

paleontologist Dr. Julia Clarke of the University of Texas explained that instead of open-mouthed roars, scientists theorize that many dinosaurs may have produced closed-mouth vocalizations.