Back to Resonance ArchitectureFrequency
Phase 3 · Frequency ExplorerEducational · Not Medical
Frequency
Explorer.
Frequency → Wavelength → Visual Wave
Move the slider. Watch the wave shorten as pitch rises. Compare 432 Hz and 440 Hz. Read the traditional Solfeggio frequencies and see them next to what physics can and can’t say about them. Everything on this page is labelled by evidence category.
220 Hz
λ ≈ 1.56 m
≈ A3
Frequency20 Hz → 20 kHz · logarithmic
Amplitude · listening levelSafety-capped at −18 dBFS
33%
Wave typeTimbre of the tone
Rhythm · visual pulse0 – 200 BPM · visual only
60 BPMVisual pulse only
Binaural stereo conceptHeadphones only · optional
Δ 7.0 Hz
Nothing plays until you press Play. Volume is safety-capped. Please start at a comfortable low level.
PhysicsWavelength is calculated as speed of sound ÷ frequency. We use 343 m/s — the speed of sound in dry air at 20 °C. The exact value changes with air temperature, humidity, altitude and medium (in water it’s ~1480 m/s), so the displayed λ is approximate.
Tuning · 432 vs 440
Two ways to tune an A.
A = 432 Hz
Alt. tuning- TraditionA = 432 Hz appears in alternative tuning traditions and is used by some contemporary musicians.
- SpiritualSome contemporary writers connect 432 Hz to natural or cosmic ratios; those readings are interpretations, not measurements.
- EmergingA handful of small studies have compared listener response to 432 Hz and 440 Hz; results have been mixed and the effect (if any) is small.
A = 440 Hz
Modern standard- PhysicsA = 440 Hz was adopted as the ISO 16 standard for concert pitch in 1955 and is the default tuning of most modern music.
- TraditionBefore standardisation, tuning drifted widely from country to country and century to century — A ranged from 380 Hz to nearly 500 Hz in different eras.
Solfeggio Traditions
Frequencies with a story.
The nine numbers below come from a 20th-century interpretation of a medieval hymn. They have a rich contemplative tradition. They are not a scientifically-established medicine.
TraditionThe set was popularised in Joseph Puleo & Leonard Horowitz’s Healing Codes for the Biological Apocalypse (1999), drawing on the Latin hymn Ut queant laxis.
SpiritualPractitioners assign each frequency to a theme (liberation, transformation, love, connection, expression, insight, unity). These are interpretations, not medical claims.
EmergingSmall trials have tested individual Solfeggio frequencies for stress and anxiety with mixed results. The strongest current signal is for slow paced listening in general — not for any particular Hz.
Binaural Beats · Concept
Two ears, two frequencies, one perceived pulse.
PhysicsSend 200 Hz to the left ear and 210 Hz to the right ear over headphones and most listeners hear a slow 10 Hz "beat" — the difference between the two frequencies.
PhysicsThe beat only appears with dichotic (headphones) listening. It disappears the moment the two ears share the same signal.
EmergingStudies on binaural beats and states like relaxation, focus and sleep are mixed. Some show small effects; systematic reviews are cautious.
ExperimentalToggle the console’s binaural switch above to feel it. Use headphones and keep the volume low.
Nature & Broadband
Not one pitch — a landscape.
PhysicsRain, wind, leaves and running water are broadband sounds — they contain energy across a very wide range of frequencies at once, roughly following a "pink noise" distribution.
EmergingStudies of nature-sound exposure and green-space listening find modest stress-reduction effects. Mechanisms are still being explored.
TraditionCultures worldwide have long used natural sound (rain drums, ocean shells, wind chimes) as an aid to focus, rest and ritual.
Cymatics · Demonstration Frequencies
Frequencies people bring to the plate.
PhysicsThese are the ballpark frequencies most commonly used in classroom Chladni demonstrations. The actual pattern also depends on the plate’s shape, thickness, material and clamping — not on frequency alone.
TraditionErnst Chladni first demonstrated these figures publicly in the 1780s; Napoleon funded the wave-equation prize that led to their mathematical description.
Room Resonance · Intro
Every room has a voice.
PhysicsAny enclosed space has natural resonances — "room modes" — determined by its length, width, height, and the speed of sound. The lowest mode along an L-metre wall is roughly c / (2L).
PhysicsExample: a 4 m long room has a fundamental mode near 343 / 8 ≈ 43 Hz. Tones near a room mode sound louder; tones between them sound quieter. That’s why bass response varies wildly across a room.
ExperimentalA full room-mode calculator with your actual dimensions and materials is coming in Phase 4 · Build Your Resonance Space.
Keep going
What’s next in Resonance Architecture.
Phase 4 will let you enter your real room dimensions and see room-mode maps and wavelength-vs-room visualisations. Phase 5 opens the Cymatics Experience with a slider that scrubs through frequencies and shows representative cymatic patterns.
Living Balance explores the relationships between sound, space, perception, geometry and wellbeing. Resonance experiences are educational and experimental and are not medical treatments. Research varies by technique and application. Always use comfortable listening levels.