Tag Archives: Rhythm

Drumming cockatoos

 

All human societies have music with a rhythmic beat, typically produced with percussive instruments such as drums. The set of capacities that allows humans to produce and perceive music appears to be deeply rooted in human biology, but an understanding of its evolutionary origins requires cross-taxa comparisons.

Drumming by palm cockatoos (Probosciger aterrimus) shares the key rudiments of human instrumental music, including manufacture of a sound tool, performance in a consistent context, regular beat production, repeated components, and individual styles.

Throughout 131 drumming sequences produced by 18 males, the beats occurred at nonrandom, regular intervals; yet individual males differed significantly in the distribution parameters of their beat patterns, indicating individual drumming styles. Autocorrelation analyses of the longest drumming sequences further showed that they were highly regular and predictable, like human music.

These discoveries provide a rare comparative perspective on the evolution of rhythmicity and instrumental music in our own species, and show that a preference for a regular beat can have other origins before being co-opted into group-based music and dance.

This according to “Tool-assisted rhythmic drumming in palm cockatoos shares key elements of human instrumental music” by Robert Heinsohn, Christina N. Zdenek, et al. (Science advances III/6 [2017]).

Above, a male cockatoo (right) drumming with a stick for a female; below, a video produced by the research team.

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Rhythm and experimental psychology

 

In the laboratories of 19th-century experimental psychologists, new concepts of precision-oriented, mechanically regulated musical time emerged as a positive ideal—one that led to the ubiquity of the metronome in the training and practice regimes of classical musicians and pervasive understandings of “good” and “bad” musical rhythm in the 20th century.

Most notably, Wilhelm Wundt included a metronome in the assembly of clockwork instruments employed in his research into the variables of human perception and action. His experiments helped to shape and define modern concepts of rhythm, radically shifting the concept of musical rhythm from a subjective, internal pulse reference to an objective, unerringly precise phenomenon independent of human agency.

At the turn of the 20th century, other psychologists, such as Carl Seashore, disseminated these scientific ideals to a wider public through important music publications, and by the 1920s such ideals were becoming pervasive among both amateur and professional music practitioners.

This according to “Refashioning rhythm: Hearing, acting and reacting to metronomic sound in experimental psychology and beyond, c. 1875–1920” by Alexander Bonus, an essay included in Cultural histories of noise, sound and listening in Europe, 1300–1918 (Abington: Routledge, 2017, pp. 76–105).

Above, Dr. Wundt (seated) and colleagues in his psychological laboratory, the first of its kind, ca. 1880; below, an abridged version of György Ligeti’s Poème symphonique for 100 metronomes.

BONUS: For the purists, a complete performance of Ligeti’s work.

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Routledge research in music

Routledge inaugurated the series Routledge research in music in July 2011 with Music, science, and the rhythmic brain: Cultural and clinical implications, edited by Jonathan Berger and Gabe Turow.

The collection focuses on the effects of repetitive musical rhythm on the brain and nervous system, integrating diverse fields including ethnomusicology, psychology, neuroscience, anthropology, religious studies, music therapy, and human health. The authors present aspects of musical rhythm and biological rhythms, and in particular rhythmic entrainment, in a way that considers cultural context alongside theoretical research and discussions of potential clinical and therapeutic implications.

Considering the effects of drumming and other rhythmic music on mental and bodily functioning, the authors show how rhythmic music can have a dramatic impact on mental states, sometimes catalyzing profound changes in arousal, mood, and emotional states through the stimulation of changes in physiological functions like the electrical activity in the brain.

Included are discussions of experiments using electroencephalography (EEG), galvanic skin response (GSR), and subjective measures to gain insight into how these mental states are evoked and what their relationship is to the music and the context of the experience, demonstrating that these phenomena occur in a consistent and reproducible fashion and suggesting clinical applications.

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