Title image

Scientific confirmations

Researches of Isabelle Sabrié
founders of the
rhythm-space harmony and its creations

Earth Bioacoustic Regular Pulsation, documentary in English, was entirely conceived and produced by Isabelle Sabrié in 2012, to explain her hypothesis, begin to prove and measure them. Posted on youtube in 2012, these hypothesis received several scienfic confirmations in 2017 and 2019, in articles of the New-York Academy of Sciences, Brain Sciences, Journal of the Royal Society. Publications of Isabelle Sabrié.

 Relative pulsations 72-96: at 28´57
96 measured for the human speech pulsation: at 29´29.


HYPOTHESIS of Isabelle Sabrié, 2012
There is a common pulse (underlying isochrony) in the terrestrial biophony: Earth Bioacoustic Regular Pulsation
“The observed commonality in so many different recordings of communicative interactions suggests an intriguing hypothesis: both human and nonhuman communicative interactions of all kinds may manifest the same, unique kind of hierarchical temporal structure that depends on the particular communicative function, and less so on the species or means of sound production. Such a result, if corroborated, would indicate that speech, music, and animal vocalizations all follow a common pattern of hierarchical temporal structure.»
And: “Vocalizations of many species exhibit temporal structure, but little is known about how these rhythmic structures evolved, are perceived and produced, their biological and developmental bases, and communicative functions. We review the literature on rhythm in speech and animal vocalizations as a first step toward understanding similarities and differences across species. ” (p 79)
Ravignani, A., Dalla Bella, S., Falk, S., Kello, C.T., Noriega, F., Kotz, S.A. 2019. Rhythm in speech and animal vocalizations: a cross-species perspective. Ann. N.Y. Acad. Sci. 1453 (2019) 79–98. p 89

HYPOTHESIS of Isabelle Sabrié, 2012
Theory of relative pulsations, 72bpm and 96bpm, multiples of 24 (2×12): at 28´57 of the documentary
Measure by ear of pulsation 96bpm for the human speech: at 29´29 of the documentary
In the spoken/sung tapping blocks, each participant was presented with 12 each of naturally spoken sentences, regularly spoken sentences, and sung sentences at the original rate (120 bpm), and six sentences in each condition at the slower rate (96 bpm)… …In the demonstration, a different sentence was used for each condition, and each was presented at a different rate (84 bpm or 108 bpm) than the ones used in the experiment.
Lagrois M.-E., Palmer C., Peretz I. 2019.Poor Synchronization to Musical Beat Generalizes to Speech. Brain Sci. 2019;9:157. doi: 10.3390/brainsci9070157. p7
84, 96, 108 et 120 bpm enter the relative pulsations theory, they are all multiples of 12 and use the pulsation 96, the one measured by Isabelle Sabrié in 2012.

HYPOTHESIS of Isabelle Sabrié, 2012
There is a pulsation (underlying isochrony) of the human speech, common to all languages: Earth Bioacoustic Regular Pulsation, at 29´29
« More work is needed to investigate this interpretation, but we can conclude that AF functions captured hierarchical temporal structure common to human speech, regardless of the inventories of phonemes, syllables, words, and sentences being spoken, and regardless of the cultural context.»
Kello, C.T., Dalla Bella, S., Médé, B. & Balasubramaniam, R. 2017. Hierarchical temporal structure in music, speech and animal vocalizations: jazz is like a conversation, humpbacks sing like hermit thrushes. J. R. Soc. Interface 14:20170231. p8