Study identifies six psycho-acoustically distinct types of screams, relaying emotions such as pain, anger, fear, joy, sadness, and pleasure. Non-alarming screams, such as expressions of joy and pleasure, are perceived and processed by the brain more effectively than screams of alarm.
When people hear screams of excited happiness, they tend to confuse the emotion with fear. Researchers say the bias toward categorizing excited and joyfully screams as fear has evolutionary roots.
Listeners can correctly identify whether pairs of screams originate from the same person or two different people. Findings suggest human screams convey a level of individual identity and shed new light on their evolutionary origin.
While screams contain certain shared acoustic factors, such as pitch and roughness, they differ in terms of emotional context.
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According to researchers, screams possess unique acoustic properties, making them a specific type of vocal expression only used in times of stress or dangerous situations.