The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds: Audiobook
According to The Books Insider's catalog data, The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds runs 5.9 hours as an unabridged audiobook, narrated by Solfeggio Sound Research (about 3.9 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 5.9 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 12 days |
| 1 hour / day | 6 days |
| 2 hours / day | 3 days |
| 1 hour / day at 1.5× | 4 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 5.9 hours, it runs longer than 54% of the 10,901 Medicine & Naturopathy audiobooks in our catalog.
About as long, on the Medicine & Naturopathy shelf
936 Medicine & Naturopathy audiobooks in our catalog run within 10% of this length. The most popular on the store:
- Everything Is Tuberculosis: The History and Persistence of Our Deadliest Infection
- The Ruthless Elimination of Hurry: How to Stay Emotionally Healthy and Spiritually Alive in the Chaos of the Modern World
- Chariots of the Gods
- Silva Mind Control Method: The Revolutionary Program by the Founder of the World's Most Famous Mind Control Course
- The Checklist Manifesto: How to Get Things Right
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds is an audiobook by Solfeggio Sound Research: a 5.9-hour unabridged recording, read by Solfeggio Sound Research, released June 22, 2025, on the Medicine & Naturopathy and Disorders & Diseases shelves.
The listen at a glance
- Length
- 5.9 hrs
- Narrated by
- Solfeggio Sound Research
- Released
- June 22, 2025
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Medicine & Naturopathy, Disorders & Diseases
- ISBN
- 9783689806286
How to listen to The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds free
New members at audiobooks.com get three free audiobooks with the trial.
Separately, the store's catalog carries more than 10,000 audiobooks that are always free to stream.
Start listening freeQuestions listeners ask
How long is The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds as an audiobook?
The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds runs 5.9 hours unabridged. At 1.5× speed that drops to roughly 3.9 hours.
Is The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds?
The Happiness Frequency | Serotonin | Dopamine: Endorphin Release Music | Mixed With Natural Sounds is narrated by Solfeggio Sound Research.