The Science of Sound Frequency and Human Performance

The Science of Sound Frequency and Human Performance

Peer-reviewed evidence that targeted sound frequency compositions measurably improve cognitive performance, recovery, sleep, and autonomic regulation — across the five performance domains.

Peer-reviewed evidence that targeted sound frequency compositions measurably improve cognitive performance, recovery, sleep, and autonomic regulation — across the five performance domains.

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The Science Behind

Sleeping Better with Soaak

The Science Behind Sleeping Better with Soaak

A third-party sleep study with 18,531 sleep records analyzed across 552 users with a within-subject design (each user as their own control) found that Soaak’s proprietary sound frequency compositions:

Device Distribution

Increased REM Sleep & Total Sleep Duration
Total Sleep Time
+34.2 min
additional time slept
REM Sleep Duration
+20.5 min
additional REM sleep
Soaak Members Average a
99 %
Sleep Efficiency Score
Longer listening is
associated with
‍better outcomes

One 10-minute Soaak session is equivalent to 25 neurofeedback sessions.

Improvements shown in sleep performance, cognitive function, stress resilience, processing speed, ability to manage worry and stress, memory processing, and executive processing

Before Soaak
Baseline brainwave activity before listening to Soaak.

After Soaak
Changes in brainwave activity after using Soaak for 10 mins.

1. Before Soaak
Baseline brainwave activity before listening to Soaak.

2. After Soaak
Changes in brainwave activity after using Soaak for 10 mins.

Medical Journal Studies

Supported By Medical Journals

528 Hz has an especially strong stress-reducing effect, even following only five minutes of exposure.

Cortisol significantly decreased and oxytocin significantly increased.

Akimoto, K., Hu, A.L., Yamaguchi, T. & Kobayashi, H. (2018). Effect of 528 Hz Music on the Endocrine System and Autonomic Nervous System

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Genetic "responses were observed for sound-activated and inactivated genes after applying 440 Hz."

Kumeta, M., Otani, M., Toyoda, M. et al. (2025). Acoustic modulation of mechanosensitive genes and adipocyte differentiation

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Listening to 432 Hz is a "useful resource for managing anxiety and stress."

Calamassi, D., Li Vigni, M. L., Fumagalli, C., Gheri, F. (2022). DOI

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432 Hz "significantly decreased clinical anxiety levels" and salivary cortisol levels.

Aravena, P. C., Almonacid, C., & Mancilla, M. I. (2020). Effect of music at 432 Hz and 440 Hz on dental anxiety and salivary cortisol levels in patients undergoing tooth extraction: a randomized clinical trial

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What are sound frequencies?

Sound frequency refers to the number of oscillations of audible sound waves per second, measured in hertz (Hz). Specific sound frequencies have different effects on the body, and are used in Soaak's sound frequency compositions to target specific areas to generate outcomes using the body's innate mechanisms.

Sound Frequency Therapy

  • Sound frequency therapy is a non-invasive, pharmacology-free modality clinically validated to support cognitive clarity, stress resilience, and sleep performance.
  • Sound therapy integrates cleanly into human performance optimization programs across the five performance domains.

How is Soaak different?

Soaak’s sound frequency compositions are created by using multiple frequencies in one audio track for specific outcomes. Soaak's sound frequency compositions can be delivered through a variety of methods, including the use of speakers, headphones, and bone-conducting headsets.

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Soaak uses proprietary and clinically proven frequency compositions that enhance psychological, physiological, and cognitive performance metrics.
Unlike binaural beats, Soaak's frequency compositions can be played through any speaker or bone-conducting headset.
Soaak's sound frequency compositions can be used actively or passively and are a non-invasive and pharmacology-free modality.
Use the dual audio feature to passively layer Soaak with any music, audio, or other media for a truly seamless listening experience.
Use proactively or reactively, 24/7, from any connected device.
Enhancing performance and mission readiness for the U.S. Air Force.
Can analyze physiological data from any wearable device (Apple Watch, Garmin, Oura, etc.), but not necessary for standard operation.

The Stress Epidemic

Stress is the #1 limiter of human performance. It isn’t just a feeling, it’s a physiological state that impacts how you think, sleep, and perform. Chronic stress is driving poor sleep, mental fatigue, and decreased resilience—quietly compounding over time. In fact, up to 90% of all doctor visits are linked to stress-related conditions (WebMD).

What the Numbers Reveal
83%
83%
Missed
of adults report suffering from work-related stress
Source
75%
75%
Missed
of adults report feeling moderate to high levels of stress
Source
74%
74%
Missed
of adults report feeling overwhelmed or unable to cope
Source
66%
66%
Missed
of adults experience sleep disruption due to stress
Source

Global Impact

A global dataset demonstrating Soaak's measurable impact on stress regulation, cognitive function, mood, and sleep performance across 190 countries.

+90 Million
+90 Million
Million
Soaak has provided over 90 million minutes of digital health services
190 Countries
190 Countries
Million
Soaak is providing support to individuals globally across 190 countries
97% Satisfaction
97% Satisfaction
Million
97% of members say Soaak has measurably improved their lives in one or more areas

Partnerships

Ōura and Soaak have been partners since 2025 and work synergistically in a closed-loop human performance optimization system.
Soaak won and completed Phase I and Phase II Small Business Innovation Research (SBIR) contracts with the U.S. Air Force.
Whoop and Soaak work synergistically in a closed-loop human performance optimization system.
Garmin Health and Soaak have been partners since 2026 and work synergistically in a closed-loop human performance optimization system.
Soaak pairs frequency compositions with meditations led by world renown experts like Rev. Michael B. Beckwith of the Agape International Spiritual Center.

I listen to the sleep sounds right before bedtime and the calming sounds during the day if I need a boost to relieve stress or anxiety. My mind and body are enriched daily by the Soaak App.

- Stacey S.
(VP, Human Relations)
The science behind this outcome

Mental, Physical, and Emotional Benefits

Cognitive Performance

Enhances focus, memory, and mental clarity; improves stress resilience

Physical Performance

Increases sleep performance, recovery, and parasympathetic activation

Psychological Performance

Promotes emotional regulation and stability in high-stress situations

Readiness & Recovery

Enhances readiness, reduces fatigue, and improves decision-making under pressure

Mental

Enhances focus, memory, and mental clarity; improves stress resilience

Physical

Increases sleep performance,recovery, and parasympathetic activation

Emotional

Promotes emotional regulation and stability in high-stress situations
Enhances readiness,reduces fatigue, and improves decision-making under pressure

Soaak has been a game-changer for my team and me. In a world that is ever changing and driving anxiety for many, it is GREAT to know we have a partner and resource that our associates and their families can rely on.

- Jack B.
(CEO)
The science behind this outcome
our podcast

Want to learn more about the science of sound?

The Science of Sound breaks down the fascinating connection between sound, frequencies, and human performance. Hosted by Aaron Fournier, this podcast explores how bioharmonic resonance, sound therapy, and cutting-edge research are shaping the future of human performance optimization. If you’re curious about the science behind how sound influences the mind and body, this show is for you.
Learn More

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