AES Show 2024 NY

This study presents a revised acoustic model of the Parasaurolophus crest, incorporating both the main airway and lateral diverticulum, based on previous anatomical models and recent findings. A physical device, as a simplified model of the crest, was constructed using a coupled piping system, and frequency sweeps were conducted to investigate its resonance behavior. Data were collected using a minimally invasive microphone, with a control group consisting of a simple open pipe for comparison. The results show that the frequency response of the experimental model aligns with that of the control pipe at many frequencies, but notable shifts and peak-splitting behavior were observed, suggesting a more active role of the lateral diverticulum in shaping the acoustic response than previously thought. These findings challenge earlier closed-pipe approaches, indicating that complex interactions between the main airway and lateral diverticulum generate additional resonant frequencies absent in the control pipe. The study provides empirical data that offer new insights into the resonance characteristics of the Parasaurolophus crest and contribute to understanding its auditory range, particularly for low-frequency sounds.