Psychoacoustic and archeoacoustic nature of ancient Aztec skull whistles

The study investigates the psychoacoustic and archeoacoustic characteristics of ancient Aztec skull whistles, which were used in social and ritual contexts. These unique instruments, crafted from clay and resembling human skulls, produce a range of sounds, from soft hisses to piercing screams. The research reveals that these sounds are predominantly perceived as aversive and frightening, mimicking natural and technological noises that capture human attention. Neuroimaging studies indicate that the auditory processing of these sounds activates specific brain regions associated with emotional significance and cognitive evaluation. The study explores three hypotheses regarding the cultural significance of skull whistles: their potential use in warfare to intimidate enemies, their association with Aztec deities, and their role in ritualistic practices linked to the underworld. The findings suggest that skull whistles were not only unique sound tools but also served specific psycho-affective functions within Aztec communities, possibly enhancing the atmosphere during rituals and evoking fear through their scream-like qualities.

- Aztec skull whistles produce sounds perceived as aversive and scary, attracting mental attention.

- The study employs psychoacoustic experiments and neuroimaging to assess listener responses to these sounds.

- Three hypotheses are proposed regarding the cultural significance of skull whistles: warfare, deity symbolism, and ritual practices.

- Skull whistles may have been used to create specific atmospheres in rituals and to intimidate adversaries.

- The research highlights the unique acoustic properties and historical importance of these ancient instruments.