intropi

Glossary

Tone

A tone is any sound in Intropi's 59-item tones catalogue.

The catalogue presents 13 frequency tones - 5 binaural, 2 isochronic, and 6 solfeggio - alongside 46 ambient beds: 30 soundscapes, 6 noise tracks, 5 singing bowls, and 5 nature sounds.

All are tones you can play alone or layer under narration.

Also called frequency tone.

Tonegentledirect

In a session

You can choose one of the 59 catalogue sounds beneath the narration or listen to it alone. A rain soundscape may give the room a steady wash. Pink or brown noise can form a broad, texture-like bed.

A bowl track has a clearer pitch and decay. A binaural entry sends different steady tones to the left and right channels, so stereo headphones are needed to hear the intended beat.

Isochronic entries pulse a single signal in a regular rhythm. You may find a sound settling, neutral, or distracting.

Keep the volume comfortable and low enough that the voice and your surroundings remain usable. A frequency label is not a promise that you will enter a named mental state.

You can switch tracks, remove the layer, or continue in silence whenever the sound competes with the session.

In more detail

The tones catalogue contains 59 rows under one ToneType family, with seven type values represented in the data. Five are binaural.

Each sends one steady pitch to each ear, and the named beat rate is the difference your auditory system perceives between them. Stereo separation is essential for that construction.

Two rows are isochronic. They pulse one signal on and off at a regular rate, so the rhythm exists in the sound itself rather than between ears.

Six solfeggio rows are built around named audible frequencies. Their numbers are pitches, not left-right beat rates.

Claims that particular solfeggio frequencies carry ancient or therapeutic meanings come from modern folk tradition and should not be treated as established science.

The catalogue also includes six coloured-noise rows.

White, pink, brown, blue, violet, and grey noise differ in how energy is distributed across frequencies, which changes the perceived balance from bright to deep or even.

Five bowl rows use sustained pitched sounds. Five nature rows use familiar environmental textures such as rain, ocean, stream, wind, and fire.

Thirty soundscape rows are file-based ambient scenes, including several kinds of rain and other places.

These rows share the product role of a selectable listening layer even though their acoustics are not the same.

That is why the catalogue's single product word should not be mistaken for one signal-generation method.

Brainwave entrainment is the theory that repeated auditory stimulation can influence ongoing neural rhythms.

A catalogue label can describe the intended stimulation rate, but it cannot guarantee that your brain follows it or that a desired feeling results.

Personal preference, volume, stereo setup, masking by narration, and the surrounding environment all change what you actually hear. The practical choice is therefore based on comfort and attention.

Binaural entries require headphones for their defining effect; other types do not share that requirement. Any tone can be left off when silence serves the session better.

What research says

The Binaural beats section of Wikipedia explains the basic acoustic effect: when separate frequencies reach the two ears, you may perceive a beat at the difference between them.

That supports the headphone requirement, not a wellbeing claim.

Ingendoh, Posny, and Heine (2023) systematically reviewed studies that used brain recordings to test whether binaural beats entrain neural oscillations.

Results were inconsistent, and studies varied widely in stimulation, design, measurement, and analysis.

The review was limited to passive stimulation research in healthy, normal-hearing adults, so it cannot establish effects for narrated sessions or clinical outcomes.

Orozco Perez, Dumas, and Lehmann (2020) compared binaural and monaural beats in a controlled laboratory study. Both produced cortical responses, while monaural beats showed stronger entrainment.

Binaural stimulation produced a distinct connectivity pattern, but its meaning was unresolved, and neither condition changed measured mood.

One laboratory study cannot settle cognitive or wellbeing effects.

Together, these sources support an audible phenomenon and active scientific questions, not a reliable promise that a named frequency forces a brain state.

They also do not test Intropi's noise, bowl, nature, soundscape, or solfeggio rows. Those catalogue types should be chosen as sounds, not treated as established treatments.

The common misconception

Myth one: frequency tones and ambient beds are two different product catalogues. Intropi stores all 59 entries together as tones.

The rows use seven represented types: binaural, isochronic, solfeggio, noise, bowl, nature, and soundscape. Myth two: a frequency name guarantees brainwave entrainment, healing, or a specific state.

Binaural and isochronic labels describe how a signal is produced. Solfeggio meanings belong to modern folk tradition, not established medical science.

A sound may be pleasant or useful as a listening preference without proving the advertised theory behind its number for you in everyday practice.

Comfort, volume, stereo requirements, and whether the track distracts you are more practical guides than a promised effect.

Examples

  • Sleep - Delta 2 Hz
    Deep delta-band binaural beat for sleep onset and deep sleep maintenance.
  • Deep Meditation - Theta 6 Hz
    Theta-band binaural for meditation and hypnotic depth.
  • Calm Focus - Alpha 10 Hz
    Alpha-band relaxed alertness. Good for reading, light work, recovery.
  • Active Focus - Beta 14 Hz
    Beta-band alertness for focused work.

Browse every tone — 59 in the library.

Where to go next

Related terms

Sources