The sound of the Sun: how to hear the five-minute oscillation
Session · The Sound of the Universe · The Sun's Pulse · 10 min
Why does the Sun vibrate?
Hot gas constantly churns in the Sun's outer layer. This turbulence produces sound waves inside the Sun; the waves bounce around inside and gently move the surface up and down. Astronomers see this motion by measuring the surface's speed through the Doppler shift of light.
The method is called helioseismology: just as earthquake waves reveal the inside of the Earth, the Sun's vibrations reveal its interior.
The five-minute oscillation
In Noyes's 1963 observations the velocity field on the Sun's surface oscillates with a mean period of about 300 seconds; a single oscillation lasts about 400 seconds on average. That is why it is called 'the Sun's five-minute oscillation'.
A 300-second period has a frequency of about 3.3 millihertz. That is about three hundredths of one vibration per second.
Sound from SOHO data
NASA's 2018 'Sounds of the Sun' work used 40 days of disc-averaged velocity data from the Doppler imager on the SOHO observatory. To select clean sound waves the data were filtered around 3 millihertz and sped up 42,000 times to bring them into the range of human hearing.
Speeding up raises the frequency by the same factor: 3 millihertz becomes about 126 Hz at 42,000 times the speed. At that rate the forty-day record lasts a little under a minute and a half.
Listening in Frekans Studio
The Sun's Pulse takes another route: it keeps the oscillation's rhythm at real speed and moves only the pitch. The sound slowly swells once every five minutes; the tone itself is 16 octaves, or 65,536 times, above the oscillation (about 218 Hz).
A Solar Flare is not about vibration: it compresses the GOES-16 satellite's X-ray record of the X9-class flare of 3 October 2024 from four hours into eight minutes.
What does the evidence say?
Context · not a claim
The velocity field on the Sun's surface oscillates with a mean period of about 300 seconds.
NASA's 'Sounds of the Sun' work filtered 40 days of SOHO Doppler data at about 3 mHz and sped it up 42,000 times.
In the flare of 3 October 2024 the X-ray flux measured by GOES-16 reached class X9 at 12:18 UTC.
Evidence levels and sources come from the database; the article adds no new claims. Evidence methodology
Frequently asked questions
- Can the Sun's sound be heard from Earth?
- No. The space between the Sun and the Earth is not a medium that can carry sound. The vibrations are measured through the Doppler shift of light and turned into sound afterwards.
- What note is the sound of the Sun?
- There is no single note: the Sun vibrates in many modes at once, gathered around 3 millihertz on average. The pitch you hear depends on the speed-up or octave shift chosen.
- Is NASA's Sun sound a recording?
- It is not a microphone recording. The satellite measures the surface's speed; this series of measurements is sped up and played as an audio file. The vibration is real; making it audible is a process.
Listen and try
The Sound of the Universe · The Sun's Pulse
Method
- Sources
- This article is not linked to a claim in the evidence database; it explains the technique and its use.
- How this article was prepared
- The first draft was prepared by an AI model (Claude); the article adds no new figures, citations or claims, and the evidence summary comes from the database. Frekans Studio approved publication. Evidence methodology
- Limitations
- This article is for information only; it is not medical advice. Evidence levels are per claim; a session's level is the weakest of its linked claims.
- Updates
- Last updated: 18/10/2026
- Cite as
- Frekans Studio. “The sound of the Sun: how to hear the five-minute oscillation”. Last updated: 18/10/2026. https://frekans.studio/en/guide/sound-of-the-sun