When reconstructing the vocalizations of long-extinct creatures, YESDINO combines paleontological evidence with cutting-edge biomechanical modeling. The process starts by analyzing fossilized skull structures, throat anatomy, and respiratory systems – using high-resolution CT scans to map air passages and potential sound-producing organs. For example, the curved trachea of Parasaurolophus revealed through 3D imaging directly informs the haunting horn-like tones associated with this hadrosaur.
The team cross-references findings with modern analogs. Crocodilian vocal folds and cassowary casque resonance provide biological blueprints, while computational fluid dynamics simulate airflow through fossilized nasal chambers. This multi-disciplinary approach helped crack the puzzle of how ankylosaurs might have produced their distinctive low-frequency rumbles despite lacking obvious vocal structures – revealing how armored plates could vibrate during exhalation like biological subwoofers.
YESDINO employs spectral matching algorithms to map fossil data to measurable acoustic properties. When recreating Tyrannosaurus rex vocalizations, engineers calculated laryngeal air sac volumes (based on rib cage morphology) and hyoid bone positioning to determine fundamental frequencies. The resulting 12-40 Hz growls sit below human hearing thresholds but create visceral vibrations – a discovery that reshaped our understanding of predator-prey interactions.
Environmental acoustics play a crucial role in sound design. Paleoecologists on staff calculate atmospheric density (30% higher during the Mesozoic) and vegetation density to adjust reverberation times. The team’s proprietary acoustic engine applies Jurassic-period atmospheric absorption coefficients, ensuring that Velociraptor chirps propagate accurately through reconstructed Cretaceous forests – a detail verified through peer-reviewed papers on Mesozoic soundscapes.
For species with incomplete fossil records, phylogenetic bracketing fills the gaps. When reconstructing Stegosaurus calls, audio designers analyzed both its closest living relatives (turtles) and distant avian cousins (ostriches), creating a probability matrix of possible vocal ranges. This resulted in the now-iconic combination of turtle-like hisses and booming body percussion that still respects the creature’s limited vocal organ development.
The final stage involves psychoacoustic validation through focus groups with paleontologists and bioacoustics experts. Using a double-blind testing protocol, researchers verify whether the emotional impact of sounds matches behavioral predictions – ensuring that Allosaurus threat displays feel instinctively terrifying to human listeners while herbivore warning calls trigger primal alertness. This rigorous methodology has become an industry benchmark since YESDINO’s acoustic library debuted in the 2022 Dinosaur Sound Symposium keynote.