Often discussed in relation to comfort and relaxation
Sound, vibration and the science of hertz
Discover what frequency means, how music notes are measured, and the traditions that have grown around particular tones.

What is a frequency?
Frequency describes how often an event repeats in a second. It is measured in hertz (Hz). Sound waves, electrical signals, and some types of electromagnetic fields can all be described using frequency.
Music pitches correspond to different sound frequencies, while Earth’s atmosphere has its own naturally occurring electromagnetic resonances.

The frequencies of music
The pitch of a musical note is related to its frequency. For example, standard concert A above middle C is commonly tuned to 440 Hz. Some musicians explore alternative tunings, such as A = 432 Hz.
The effect of listening to music can be relaxing and meaningful, but specific claims that an individual note heals a disease are not established.
Solfeggio frequencies
These tones have associations in contemporary sound-wellness traditions. The descriptions below are historical or cultural associations, not proven medical outcomes.
A commonly referenced Solfeggio tone
Traditionally associated with releasing fear
Traditionally associated with change
Often called the “love frequency”
Traditionally associated with connection
Traditionally associated with expression
Traditionally associated with intuition
Traditionally associated with contemplation
The Schumann resonance
Lightning-generated electromagnetic activity produces resonant frequencies in the cavity between Earth’s surface and the ionosphere. The fundamental Schumann resonance is approximately 7.83 Hz.
Although this is a genuine geophysical phenomenon, direct health benefits from exposure to 7.83 Hz have not been established.
Approximate fundamental Schumann resonance
Exploring the wider literature
Nogier frequencies
A set of pulse rates referenced by some light-therapy practitioners; condition-specific benefits are not established.
CAFL and Rife lists
Collections of frequencies circulated within alternative wellness communities; they should not be treated as proven disease therapies.
Musical note frequencies
Compare standard pitches and intervals, measured in hertz.
Personal sessions
Use the QBT app to organize frequencies and favorites for your compatible device.
