Beyond the Mindfulness App: Why Researchers Want to Measure What a Voice Does to the Autonomic Nervous System

Wellness offerings for healthcare staff have plateaued. Three decades of audience reports about an Australian polyphonic vocalist may be getting a second hearing — this time, on heart-rate-variability monitors and Poincaré plots.

Healthcare wellness procurement has spent the better part of a decade integrating mindfulness applications, structured breath-work modules, and resilience-coaching platforms into clinician-facing offerings. The category has matured. The clinical evidence base has matured with it. And the operational question has, by now, narrowed to a familiar one: are the marginal returns worth the renewal fees?

Several wellness-program directors I spoke with for this piece described the same plateau. Adoption is steady but no longer rising. Self-reported stress reduction shows the diminishing returns of a saturated category. The next thing has not yet announced itself.

It may now be announcing itself in an unexpected register. Across Europe, the CIS, and Australia, an audience of more than 200,000 women has spent the last five years using a single 12-minute vocal practice taught by an Australian polyphonic vocalist named Perukua. Until recently, the evidence base for that practice consisted almost entirely of audience reports — the kind of testimony that procurement does not buy on. What has changed in the last several years is the start of a measurement record.

From audience report to autonomic measurement

Perukua is not a typical sound-healer with a pretty voice and an esoteric appeal. She is a mature, accomplished singer, composer, and lyricist with thirty-five years on stage. Her primary work, until recently, was performing songs and running practitioner programmes for women using methods she has been developing since 1996. In 2017, she presented publicly a new vocal approach drawn from that body of work — a polyphonic technique in which her main tone splits into up to three simultaneous overtones above a fundamental. The combined range of her voice with overtones spans 50 Hz to 11,812 Hz — close to the practical bandwidth of human auditory perception.

The longer-form pieces she performs live to audiences of up to six thousand, and that she also distributes as recordings, she calls soundscapes. They are wordless and structured. They are not songs in the streaming-platform sense. They are extended sonic events.

What has begun to draw researcher attention is not the sound itself, but the response in the listener. Preliminary internal observations — not clinical trials — conducted using heart-rate-variability (HRV) monitoring and Poincaré-based mathematical analysis on small sample groups of ten participants have shown an unusual pattern. Listeners have displayed simultaneous sympathetic activation and parasympathetic engagement: the cardiac signature most often associated with elite athletes in flow. That pattern, in sports psychophysiology, marks the state in which decision-making, pattern recognition, and cardiovascular efficiency rise together rather than trade off.

In a separate group of ten participants, HRV data was recorded before and after exposure to one of Perukua’s soundscapes. The analysis applied a power-of-the-heart-waves method, which converts the magnitude of HRV oscillations into an estimated marker of organismic energy. After a single ten-minute exposure, that marker rose by between two and fourteen times across participants.

A third set of preliminary tests, conducted with Swiss-made bioresonance equipment, produced a different but parallel picture. Stress markers fell in most participants, and a number of them showed a reduction in their cardiovascular biological-age marker of fifteen percent or more after a ten-minute soundscape exposure. The lead researcher running these tests applied the same protocol to herself, and her own marker shifted from fifty-three to forty-three.

None of these are clinical trial outcomes. They are early observational data — the kind that opens a research question rather than answering one.

A senior neurophysiologist preparing to look more closely

Those findings have been brought to the attention of Alexander Ya. Kaplan, Ph.D., D.Sc. — head of the Laboratory for Neurophysiology and Neuro-Computer Interfaces at Lomonosov Moscow State University, recipient of the Russian Federation Government Prize in Science and Technology and Moscow State University’s Lomonosov Prize, and one of the most prominent researchers in his field on brain–computer interfaces and the neurophysiology of altered states of consciousness. His work has international standing; he is a frequent invited speaker at major neuroscience and psychophysiology events, including in the United States.

Kaplan’s laboratory has spent four decades on EEG analysis, neurofeedback, and brain–computer interfaces, with field studies on long-term meditators in Indian ashrams and Tibetan monasteries. He is also the scientific lead on a Moscow city-government programme applying pulsometry-based stress diagnostics to schoolchildren and university students. The combination of an HRV-and-stress portfolio with a meditation-neuroscience portfolio is what makes his interest in this question professionally credible: he has, on both sides of his work, been looking at how state-modulating stimuli register on autonomic and EEG signatures.

After reviewing the initial findings, Kaplan expressed his interest in testing Perukua’s vocal output as a subject of physiological inquiry. Whether the formal measurements will replicate the early observations — the activation/parasympathetic flow signature, the energy-marker increase, the biological-age shift — is, of course, the question of the testing.

What this means for healthcare operators

The category implication is modest and, for procurement, useful. The dominant clinician-wellness category for the past decade has been calming-the-nervous-system content, delivered through mindfulness platforms whose mechanism is well-understood and whose effect size has been thoroughly characterised. The category that is now beginning to register on instruments — extended-form vocal sound exposure — may produce a different physiological signature: not just calm, but the activation-plus-parasympathetic combination that performance physiology associates with flow. If that pattern holds under formal measurement, it is a different intervention class, with different implications for shift-work resilience and acute-recovery use cases.

None of this is yet the basis for a procurement decision. It is, however, the basis for tracking. Wellness-program managers who have spent the past three years asking what comes after the mindfulness app may want to know that a category is being moved from the audience-report column to the instrument-data column — and that the senior researcher preparing to run the formal measurements has the right portfolio for the question.

On the practitioner

Over the course of more than thirty years, Perukua has performed across three continents in halls of up to twenty-one thousand, released ten albums, and recorded with three-time GRAMMY® Award winner Tom Wasinger. Her vocal soundscapes, in addition to her live performances, are used inside her practitioner programmes — non-traditional meditations, breath-and-voice practices, and structured courses — across a range of measurement domains in which they have shown consistent positive effects.

The wide array of audiences from general wellness followers to the ones in bio hacking register trying to find in Perukua’s vocal soundtracks potent replacement to mindfulness apps that shown limited efficiency over time.

That track record behind her voice has drawn growing third-party research interest from psychophysiology, performance-medicine, and longevity-adjacent quarters. 

That is, in the end, the procurement question. What we know so far is that the experience is real — the audience evidence on that has accumulated for three decades. The initial data supports public acclaim. The question is whether the experience, once measured using formal protocol, behaves the way the audience says it does. In the next research window, we may begin to find out.