Blumstein explains that screams from mammals involve overblowing their vocal folds, resulting in high-pitched sounds filled with nonlinear irregularities that signal urgency and distress.
In his studies, Blumstein noted that screams, unlike normal alarm calls, contain unique waveform patterns that are inherently alarming and can capture attention across species.
Research indicates that even animals that do not vocalize, such as skinks and lizards, behave differently in response to the nonlinear sounds of screams.
Screams serve an evolutionary purpose; their alarming nature has likely played a significant role in survival by attracting attention to urgent situations.
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