Sound Therapy with lunar rhythm

The Sea and Life

About 70% of the earth's surface is covered with sea, so when you see the earth from space, it shines blue.One of the reasons why it sparkles is that the sea water is moving.The water level of the sea changes periodically and slowly waving up and down.This phenomenon is caused by the combined force of the gravitational force of the sun and the moon and the centrifugal force of the earth, and the force of the electromagnetic force between the negative charge of the moon and the positively charged ionosphere acting on the sea water. This phenomenon is called tidal.

The state when the tide level is fully raised is "high tide" and the state when the tide level is fully lowered is "low tide".The earth rotates once a day, so many places have high and low tides twice a day.When the sun, the moon, and the earth are aligned, the tidal forces of the sun and the moon overlap, resulting in the largest difference between high and low tides in a day. This is the spring tide.When the moon, the earth and the sun reach 90 degrees, the tidal forces cancel each other out, so the difference in tide level is the smallest. This is called neap tide.

Tides are an example of the cosmic rhythm of the sun, the earth, and the moon.Let's see how this cosmic rhythm affects us.

Sea in the body

It is known that the ecology of organisms living in and around the sea is closely related to the cycle of the rise and fall of the tide, and molts and lays eggs as the water level changes. It is often on the news that sea turtles come up to the beach to lay eggs at the night of the spring tide of the full moon and coral releases eggs all at once at the night of the spring tide of the full moon. In this way, marine organisms live in synchrony with the tides, using their clocks and magnetically responsive functions to measure changes in the tides in the body.

  • Blood

  • Seawater

Components of blood and seawater

The instinct to follow the tides is not only present in aquatic life but also in terrestrial life. There is a case report that fetuses grow in the ocean of the uterus to reproduce the process of evolution, and the number of births increases in the days before and after high tide according to the delivery of natural childbirth. Emotions tend to rise at high tide and calm down at low tide.

The water content in the human body is about 60% to 70%, similar to the ratio of the earth's land to the sea, and the components of blood and amniotic fluid are similar to those of seawater, as shown in the graph.

In the infinite universe, our lives are born in the sea and become the sea.

What is Harmonium

Harmonium is a sound therapy application that penetrates the rhythm of the moon and the sea into your mind and body. The feature reconstructs the periodic waves of the moon and the sea as perceived by sight and hearing, and plays healing sound which goes along with "Rhythm of human and nature".
Harmonium arranges moon and tide astronomy and ocean data into healing sounds in real time and feeds them back to human cells.

Rhythm of human and nature

  • Natural rhythms appear as a continuous stream rising and falling toward the peaks and valleys of the wave.

    Sunrise / sunset, moon phases, tides, seasons, etc.

  • A human's internal rhythm is stable when it is synchronized with the natural rhythm.

    Coordinated regulation of autonomic nerve and sympathetic nerve, such as heart beat, respiration, blood pressure, thermoregulation, sleep and awakening, menstruation, etc.

  • When a human goes against the natural rhythm, the internal rhythm becomes unstable and the sense of happiness is impaired.
  • In order to stabilize the internal rhythm, it is important to synchronize with the natural rhythm.

How Harmonium Works

Harmonium creates healing sounds from the moon's astronomical location(moon phase and distance between the earth and the moon) and weather forecast (atmospheric pressure and tide level).
This healing sounds are composed of the sound of waves striking the seashore, the sound of creatures living around, the weather sound of rain and thunder, and the music played on a piano tuned to 432 hz.

We have also introduced a mechanism called "frequency following response" based on brain science research that says that when a person's brain waves reach the 8 ~ 13 Hz alpha band, the mind and body become calm.
This is a phenomenon in which when sound of different frequencies enters the left and right ears of a person, a vibration wave of the different frequencies is generated in the brain, and the brain wave synchronizes with it. For example, if you have a sound of 100 Hz in your left ear and 108 Hz in your right ear, your brain waves will be tuned to the difference of 8 Hz. The difference between the left and right frequencies is used because the range of hearing in a person's ear is between 20 Hz and 20 kHz, so a 8 ~ 13 Hz sound cannot be heard directly.
Harmonium makes use of two types of "frequency following response" guiding sounds, 432Hz and 528Hz, according to the position of the moon and, while aligning with the tide level in real-time, changes the frequencies of the left and right sounds like the ebb and flow of the tide, guiding the brainwaves to 7.83Hz, a little lower than 8Hz.

From top to bottom, the screen shows the moon phase for 9 days (distance between the earth and the moon), the weather and pressure for 5 days, and the sea level for the day. This represents the natural processes that the rhythm of the universe transmits to the sea through the atmosphere.

Harmonium gives you a sense of natural rhythms.
Please watch yourself floating in the sea of the universe and let yourself be in the waves.
Feel the waxing and waning of the moon and the rise and fall of the tide not in your mood or physical condition but in a sense that you have never noticed before.

Volume adjustment dialog

location information

Displays your current location using the device's GPS capabilities. When you start this application for the first time, please allow the device to use Location Services. Location Services can be turned on / off in "Settings" > "Privacy" > "Location Services" on the iPhone/iPad.

Moon phase

Displays the phase of the moon and the distance between the earth and the moon until 8 days later.
Here we can see the relationship between the sun, the earth and the moon. Because the Moon revolves around the Earth in an elliptical orbit, its distance is variable: it is 363,304 km when closest (perigee), and 405,495 km when farther away (apogee). The difference between apogee and apogee is 50,330 kilometers, which is equivalent to the difference of 4 Earths.

Switch the display

Touch the area showing the month to switch between "display of the distance between the earth and the moon" and "monthly phase cycle display".

5-day weather and barometric pressure

Displays the weather, temperature (Maximum/Minimum Temperature), humidity, and pressure for the next 4 days. The unit of temperature can be changed from Celsius (°C) to Fahrenheit (°F) in "Setup".

Wave animation

Animate the sea conditions of the tide station closest to our current location based on predicted tide level, wind force and wind direction data. The data is not a measurement. It is different from the actual state of the sea.

Today's tide level

The current tide level prediction graph (Vertical Axis: Tide Horizontal Axis: Time) and the location information of the tide level prediction are displayed below it. Numbers in m (Metric) indicate the difference between the current sea level and mean sea level (MSL). The predicted tide level position uses the tide level calculation coordinates closest to the current position. These are generally called tidal stations, and there are 3610 of them around the world. Tide level data are calculated predictions (astronomical tide level) and do not take into account current weather conditions. It is different from the actual observed tide level (actual tide level). Do not use this app for navigation or for life-threatening purposes.


Harmonium has three channels: "Concentration", "Relax", and "Sleep".

Concentration:Only the sound of waves is played for 45 minutes so that you can concentrate on studying and creating. The frequency-following response tone is not played back.

Relax:It adds frequency-following response sound to the sound of waves and leads to a relaxed state. The playback time is 30 minutes. Best to use as background music when you take a break from work or take a nap.

Sleep:Four sounds are used to induce sleep: the sound of waves hitting the coast, environmental sounds such as the voices of living organisms, piano sounds, and frequency-following sounds. The playback time is one hour.

Volume adjustment

Touch the center of the screen to display the volume adjustment dialog. There are 4 volumes that can be controlled individually: "the sound of waves" "environmental sound" "piano sound" "frequency-following response sound". "frequency-following response sound" does not have a strong effect when the volume is increased. Set the volume so that you can hear when you concentrate on the sound.

Trial listening

Harmonium recreates the soundscape by combining 24 field-recorded sound waves, 64 ambient sounds and 37 piano sounds, synchronized with the moon phase and sea level.
You can listen to the samples below. There are six samples, but the actual app reproduces a different soundscape every day, roughly every 29 days, according to the month's age cycle.


Shore sound


Shore sound + FFR induced sound


Shore sound + environmental sounds + Piano sound + FFR induced sound


Shore sound + environmental sounds + Piano sound + FFR induced sound


Shore sound + environmental sounds + Piano sound + FFR induced sound


Shore sound + environmental sounds + Piano sound + FFR induced sound

Download the App

This application has a 3-day free trial period.
Please try to be useful during this period.

In app purchase / Auto-renewable subscriptions

Monthly subscription $0.99 / Month

This amount is from the App Store in the United States.The amount is different in other countries.

This application charges a subscription fee because it uses a weather(Dark Sky: and tide(WorldTides: forecasting information service that charges for usage based on the number of hits.

Auto-renewable subscriptions

Auto-renewable subscriptions will not be executed unless you purchase in-app charge.
If you signed up for a free trial subscription and you don't want to renew it, cancel it at least 24 hours before the trial ends.
If you do not cancel the automatic renewal at least 24 hours before the end of the period after the in-app purchase, the contract period will be automatically renewed.


You can restore subscription updates at any time. Make sure you are signed in to the App Store using the same Apple ID you used when you purchased your iPhone or iPad, then from the Harmonium's "Setup" > "Purchase/Restore", tap the "Restore" button.

Cancel your subscriptions

See Apple's official site.

View, change, or cancel your subscriptions

Safety Precautions

Harmonium uses special sounds known as Frequency Following Response sound(A similar sound is binaural beats).Therefore, please do not use this app in the following cases.

  • If you suffer from epileptic seizures.
  • If you suffer from heart disease.
  • If you use a pacemaker.
  • If you are driving a car or ship,bike,bicycle.
  • If you operating a machine.
  • If you are less than 12 years old.

If you feel physical or mental discomfort, please discontinue use immediately.


  • Harmonium can't play sounds as background music while running other applications.
  • Please turn down the volume of the iPhone/iPad before starting Harmonium.
  • If you use Harmonium for background music while sleeping, connect the iPhone to a power adapter to prevent the battery from running out.
  • Harmonium is not intended for medical treatment. If you feel any physical or mental discomfort, discontinue use immediately.
  • The tide level information is a forecast value(astronomical tide). it differs from the tide level actually observed(measured tide level). Do not use this application for voyage, diving, fishing.

How to use Harmonium

Learn more