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Biology subjects

Diaz-Andreu, M.

Publications and source records attributed to Diaz-Andreu, M..

2 recordsLinked to original sources

Psychoacoustic Study of the Rock Art Sites of Cuevas de la Arana (Bicorp, Spain)

Acoustics play a crucial role in shaping our perception of sound and its emotional impact. The rock art site of Cuevas de la Arana in Bicorp, Spain, is an archaeological site where pre-historic communities gathered for social and ritual activities. Cuevas de la Arana exhibits acoustical characteristics that could have enhanced the sensory and emotional impact during ceremonies performed with music. In the present study, a listening test was conducted to assess how the acoustics of Cuevas de la Arana and other rock art sites influence modern-day listeners perception of sound. Listeners were asked to describe, using their own vocabulary, a series of auralizations created with the impulse responses collected in Cuevas de la Arana and other neighboring sites with and without rock art. The words written by participants underwent categorization through a hierarchical clustering approach. Significant results emerged indicating that listeners perceived auralizations from rock art sites as larger, wider, less direct, farther and more reverberant than the auralizations from sites lacking rock art. Notably, the most prominent disparities were observed in the categories of size, distance, and reverberation when contrasting the auralizations from Cuevas de la Arana with those of non-painted sites. These findings align with the outcomes documented in prior literature that investigated the acoustic characteristics of the sites and offer valuable insights into the auditory experiences at rock art sites, shedding light on their unique acoustic properties.

animal behavior and cognition↗

Assessing the relationship between neural entrainment and altered states of consciousness induced by electronic music

In electronic music events, the driving four-on-the-floor music appears pivotal for inducing altered states of consciousness (ASCs). While various physiological mechanisms link repetitive auditory stimuli to ASCs, entrainment--a brainwave synchronization through periodic external stimuli-- has garnered primary focus. However, there are no studies systematically exploring the relationship between entrainment and ASCs. In the present study, we depart from the finding that entrainment to auditory stimuli peaks for stimulation rates around 2 Hz compared to others. Twenty participants listened to six one-minute electronic music excerpts at different tempos (1.65 Hz, 2.25 Hz, and 2.85 Hz). For each excerpt, they performed cognitive tasks and reported phenomenological experiences related to ASCs through questionnaires. Brain activity was recorded with electroencephalography to assess whether a modulation in entrainment by the beat of electronic music affected objective and subjective proxies of ASCs. Our results revealed a tempo-driven entrainment modulation, peaking at 1.65 Hz. Similarly, participants experience of unity during listening to the music was higher for the excerpts at 1.65 Hz, yet no relationship with entrainment was found. Critically, a correlation was found between entrainment and participants reaction time. Further studies are granted to explore how individual traits, such as musical training, modulate the relationship.

neuroscience↗