Before Words, There Is Rhythm

The Rhythm of Communication: From Crickets to Humans

Guy Amichay, a researcher at Northwestern University, travelled to Thailand to study the synchronisation of fireflies. Watching the insects flicker in the dark, he noticed something unexpected: in the distance, crickets chirped in the same rhythm. These two species, separated by vast evolutionary distance, had settled on the same pace of communication—about two signals per second.

Amichay and his team analysed studies of communication across more than 200 species, from fish and frogs to birds and mammals. The result was strikingly consistent. Across the animal kingdom, communication unfolds within a narrow frequency range of 0.5 to 4 hertz, most often clustering around 2 hertz—two signals per second. A firefly and a sea lion, though worlds apart, “speak” at the same tempo.

It Is Not Only About Animals

The researchers make it clear that this discovery extends beyond the animal world. It may help explain how humans perceive rhythm. A tempo of roughly two beats per second appears in popular music. It also defines the natural pace of speech—the speed at which we talk, listen, and register pauses between words. The human brain, much like that of a firefly, seems optimised to process signals at this tempo.

The implications are practical. If the brain most effectively registers information at around 2 hertz, this insight can inform the design of interfaces, warning systems, and even educational tools. A speaker who talks too quickly or too slowly loses the listener’s attention—not because the content lacks interest, but because the tempo falls outside the optimal perceptual range.

Rhythm as a Precondition of Meaning

Daniel Abrams, a co-author of the study, points to the underlying mechanism. A tempo of about two signals per second does not carry specific information on its own. It functions as a carrier—a rhythmic substrate that captures attention. Only against this background can meaningful content emerge. Before meaning can be transmitted, synchronisation at the level of basic rhythm must occur.

What This Means in Practice

To be understood, it is not enough to be right or to say something important. One must first attune to the listener’s tempo. Someone who speaks too quickly will not be heard—not because their arguments are weak, but because their brain and the listener’s brain fail to synchronise. Someone who speaks too slowly invites fatigue and distraction. This is not a matter of style. It is a matter of neurobiology.

The same applies in reverse. To understand another person, it does not suffice to analyse the content of their words. One must first sense their rhythm. This is why conversation with some people feels immediate and effortless—even when we disagree—while with others it becomes strained, even when we share their views. The difference often lies not in content, but in tempo.

Before communication acquires meaning, synchronisation must take place. Without it, even the strongest arguments, the most sincere emotions, and the most important facts may fail to reach the listener. The rhythm of communication reminds us that the fundamental challenge of conversation lies not only in what we say, but in whether we are able to hear one another at all.

Read this article in Polish: Natura ma swój rytm. I to on decyduje, czy się rozumiemy