What does Freqium play?

Freqium plays specific sound tones (measured in Hz) intended for sleep, calm, and focus. Different ranges are associated with different states — delta (1-4 Hz) for deep sleep, theta (4-8 Hz) for meditation, alpha (8-14 Hz) for relaxation, and gamma (30-100 Hz) for focus.

Is frequency listening clinically proven?

Brainwave entrainment — the brain synchronizing to external audio stimuli — is documented in auditory neuroscience since the 1970s via EEG studies. The Frequency Following Response (FFR) is consistently replicated. That is not a clinical-proof claim. Each Freqium frequency is labeled Emerging, Traditional, or Speculative.

What frequency is for calm?

432 Hz is the most commonly studied tone we offer for calm. People use it to slow down and feel calmer. Freqium offers a free 432 Hz Find Calm session.

What is the best frequency for sleep?

Delta frequencies (0.5-4 Hz), particularly 1.5 Hz, are associated with deep sleep. The Schumann resonance (7.83 Hz) is often used for grounding. Freqium's Deep Sleep Protocol combines both.

Do I need headphones for Freqium sessions?

Yes, headphones at a low, comfortable volume are recommended. They are required for binaural pairs (one tone per ear), which the iOS app uses for frequencies under 20 Hz and the landing page demos use.

Freqium offers a 15-minute guest session on any of the 27 frequencies, no account needed. Membership removes the limit. Two launch offers until Nov 30, 2026: Monthly at $9/month instead of $29, kept for as long as you stay subscribed (or $69/year instead of $290), and Founding Lifetime at $79 once for the first 100 members. After that, membership is $29/month or $290/year.

What are wellness frequencies?

Wellness frequencies are specific sound tones (measured in Hz) that research suggests can influence brainwave patterns through a process called brainwave entrainment. Different frequencies target different states — delta waves (1-4 Hz) promote deep sleep, theta waves (4-8 Hz) aid meditation, alpha waves (8-14 Hz) enhance relaxation, and gamma waves (30-100 Hz) support focus and cognition.

What is the difference between binaural beats and solfeggio frequencies?

Binaural beats play two slightly different tones in each ear, creating a perceived frequency difference that encourages brainwave entrainment. Solfeggio frequencies are specific single tones (174 Hz, 396 Hz, 432 Hz, 528 Hz, etc.) from an ancient musical scale. On the web, Freqium plays single tones (with an audible harmonic for very low frequencies); the iOS app plays frequencies under 20 Hz as binaural pairs.

Which frequency is best for calm?

432 Hz is the tone people reach for most when they want to feel calmer. Freqium offers a free 432 Hz Find Calm session with guided breathing.

Are frequency sessions free?

Guests can play any of the 27 frequencies for 15 minutes. 15 min free · Headphones recommended. Membership removes the limit. Two launch offers until Nov 30, 2026: Monthly at $9/month instead of $29, kept for as long as you stay subscribed (or $69/year instead of $290), and Founding Lifetime at $79 once for the first 100 members. After that, membership is $29/month or $290/year.

What is 1.5 Hz frequency used for?

The 1.5 Hz frequency (Deep Sleep Delta) is used for sleep quality improvement, relaxation practice, rest days. Ultra-deep delta frequency for restorative sleep, promoting deep rest and overnight recovery

Is 1.5 Hz safe to listen to?

1.5 Hz is generally safe for most adults when used with headphones at moderate volume. Precautions: If you are pregnant, use an implanted device, or a clinician is already caring for you, talk with them before listening. Stop if you feel dizzy or distressed. This is a wellness tool, not a medical device. Consult a healthcare provider if you have medical conditions.

What are the benefits of 1.5 Hz frequency?

People use 1.5 Hz for: support for deeper sleep stages, enhanced sense of overnight rest, improved sleep quality, better morning refreshment, relaxation before bed, support for natural rest. Early studies on 1.5 Hz describe the effects below. They are small and still being repeated, results vary from person to person, and none of this is a medical claim.

Can I listen to 1.5 Hz for free?

Yes. 1.5 Hz Deep Sleep Delta is available on Freqium with 15-minute guest sessions. 15 min free · Headphones recommended.

1.5 Hz60 min recommendedFree

Deep Sleep Delta

Ultra-deep delta frequency for restorative sleep, promoting deep rest and overnight recovery

Ready to try Deep Sleep Delta?

15 min free · Headphones recommended

EmergingDOI · Thoma 2013 DOI · Goldsby 2017 DOI · Nakajima 2016

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What is the 1.5 Hz frequency?

Delta-range frequencies (0.5-4 Hz) are the slow rhythms associated with deep sleep. People use a low 1.5 Hz tone as a backdrop for a bedtime routine. Studies of sound at night are still early, and they are not proof that a tone changes sleep.

Proposed mechanism

Associated with slow-wave sleep states that support deep rest and natural overnight recovery processes

What early studies describe

Early studies on 1.5 Hz describe the effects below. They are small and still being repeated, results vary from person to person, and none of this is a medical claim.

Support for deeper sleep stages

Enhanced sense of overnight rest

Improved sleep quality

Better morning refreshment

Relaxation before bed

Support for natural rest

Who is this for?

People often choose 1.5 Hz for:

Sleep quality improvementRelaxation practiceRest daysSelf-care routinesStress managementEvening wind-down

Experience it yourself

Reading about a frequency is one thing. Feeling it is another.

EmergingDOI · Thoma 2013 DOI · Goldsby 2017 DOI · Nakajima 2016

Start 60-Minute Session

The science behind 1.5 Hz

Brainwave entrainment is the idea that the brain’s electrical activity can fall into step with a steady rhythm you hear. A related response, the Frequency Following Response (FFR), can be measured with EEG.

For 1.5 Hz there are frequency-specific studies, listed below. They are early and mostly small, so read them as a reason to try it, not as proof that it will work for you.

Published Research

[1]Thoma MV, et al. The effect of music on the human stress response. PLoS ONE, 2013; 8(8): e70156. https://doi.org/10.1371/journal.pone.0070156

[2]Goldsby TL, et al. Effects of Singing Bowl Sound Meditation on Mood, Tension, and Well-being. J Evid Based Complementary Altern Med, 2017; 22(3): 401-406. https://doi.org/10.1177/2156587216668109

[3]Nakajima Y, et al. Stress Recovery Effects of High- and Low-Frequency Amplified Music on Heart Rate Variability. Behav Neurol, 2016; 2016: 5965894. https://doi.org/10.1155/2016/5965894

How to use Deep Sleep Delta

Suggested session

45-60 minutes during sleep hours, use with good sleep hygiene practices. Individual experiences may vary

🎧

Use headphones

Over-ear or in-ear, at a low volume. They keep the tone clear without turning it up.

🧘

Find a quiet space

A calm room makes it easier to settle in and notice how you feel.

📅

Be consistent

A short session every day is easier to keep. Notice how you feel and adjust.

Safety information

Listening to frequencies is generally considered safe for most adults. However, certain conditions require caution. Consult a healthcare professional before use if any of the following apply:

⚠If you are pregnant, use an implanted device, or a clinician is already caring for you, talk with them before listening
⚠Stop if you feel dizzy or distressed
⚠This is a wellness tool, not a medical device

This information is for educational purposes only. Freqium is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease.

Connected frequencies

Deep Sleep Deltaworks with these frequencies — here's the science behind each connection.

→

Schumann Earth Resonance7.83 HzSequential

Sleep Protocol: Schumann (7.83 Hz) 1h before bed as a wind-down → delta (1.5 Hz) at bedtime, the rhythm of deep sleep.

Used together in:Deep Sleep Protocol →

∞

Find Calm432 HzComplementary

A busy mind makes sleep harder. Use 432 Hz in the evening to slow down → delta 1.5 Hz at bedtime.

Used together in:Deep Sleep Protocol →

⚡

Solfeggio 528528 HzSynergistic

Delta matches the rhythm of deep sleep; 528 Hz is a soft tone for winding down before it.

The research behind this sound

Tones Timed to Deep Sleep

2013Tübingen, Germany

Dr. Jan Born

Director, Institute of Medical Psychology · University of Tübingen

Study summaryA lab study that played soft tones in time with the slow waves of deep sleep.

At the University of Tübingen, Hong-Viet Ngo, Jan Born and colleagues asked whether sound could interact with deep sleep.

Their system watched sleeping volunteers' brain waves and played a soft click in time with the slow oscillations of deep sleep (around 0.5 to 1 Hz).

In the lab, the timed clicks strengthened those slow oscillations, and volunteers remembered word pairs learned the evening before a little better than after a control night.

This used precisely timed clicks and EEG, which is different from listening to a delta tone at home. We share it as background on why sound and sleep are being studied together.

Slow oscillations

Stronger (lab)

Closed-loop clicks timed to deep-sleep slow waves, in a sleep lab (Neuron, 2013)

Sleep and sound are being studied together, carefully.

Auditory closed-loop stimulation of the sleep slow oscillation enhances memory. Neuron, Vol. 78, Issue 3, pp. 545-553

Now you know the science. Feel it for yourself.

Experience 1.5 Hz

Hear 1.5 Hz for yourself.

You’ve read what is known and what isn’t. Put on headphones and notice how Deep Sleep Delta feels to you.

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15 min free · Headphones recommended

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