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  • About Us
  • Book Session
  • In Person Session
  • Why In Person Sessions?
  • Lullaby Speaker
  • The Science of Our Method
  • Meet the Founder
  • Contact Us
  • Research/Ref
  • More
    • Home
    • About Us
    • Book Session
    • In Person Session
    • Why In Person Sessions?
    • Lullaby Speaker
    • The Science of Our Method
    • Meet the Founder
    • Contact Us
    • Research/Ref
  • Home
  • About Us
  • Book Session
  • In Person Session
  • Why In Person Sessions?
  • Lullaby Speaker
  • The Science of Our Method
  • Meet the Founder
  • Contact Us
  • Research/Ref

Book Your Session Today!

Call or email us to schedule your session

sd@heartbeattranquility.com 360-739-2401

Hours

Open today

10:00 am – 05:00 pm

About Us

Heartbeat Tranquility provides a personalized heartbeat lullaby recording of the mother as a sleep aid solution for newborns, and a tranquil peace of mind for the parents. The product is a portable speaker that plays the mothers heartbeat and voice singing her personalized lullaby. Let your newborn sleep easy, listening to the sentimental sounds they love. The mothers heartbeat and voice.

Price for Service and Product: $299.99

Our Unique, One of a Kind, 2 Hour in Person Session

Relaxation/Heartbeat Recording

Song Writing/Personalized Lullaby

Song Writing/Personalized Lullaby

We begin with a guided muscle relaxation session to naturally lower the mother's heart rate into a relaxed state.

Next, we use studio-grade equipment to capture and preserve the beautiful, natural rhythm of the mother's heartbeat.

Song Writing/Personalized Lullaby

Song Writing/Personalized Lullaby

Song Writing/Personalized Lullaby

We then guide and support the mother in crafting a personal, custom lullaby written especially for her newborn.


Song writing experience or musical experience is not needed, we have skilled professionals to help those who have no background in music feel comfortable and capable.  This is not about musicianship, it is about capturing your love for your newborn.

Lullaby Recording

Song Writing/Personalized Lullaby

Lullaby Recording

We then use studio-grade recording equipment to record the mother singing the lullaby to ensure high quality. When She is singing, it is to the rhythm of her recorded heartbeat. The final recording is Mom singing the lullaby (a capella) in rhythm with her heartbeat.

Why We Do In Person Sessions?

Ensure a unique experience

Ensure a thoughtful and sentimental approach

Ensure high quality recording

Having a baby is a truly unique experience, and we aim to provide an extension of that wonderful moment in time. The love for your baby is unique, and we make sure to capture that love in a way that can be heard at the push of a button. We use a clinical approach in our sessions to ensure the mother is comfortable, relaxed, and present in the moment. It is an experience you cant buy off the shelf or online.

Ensure high quality recording

Ensure a thoughtful and sentimental approach

Ensure high quality recording

Standard baby products that feature short, quick voice recordings often suffer from low audio quality. This can confuse a newborn; the playback sounds familiar, but the distorted frequency does not match how a mother sounds in real life—much like a baby hearing a parent over a poor phone connection for the first time. We eliminate this friction. By utilizing professional, studio-grade recording equipment, we capture the pure, authentic depth of your voice. The result is flawless clarity, ensuring that mom sounds exactly like mom.

Ensure a thoughtful and sentimental approach

Ensure a thoughtful and sentimental approach

Ensure a thoughtful and sentimental approach

Expecting mothers have incredibly full schedules, balancing work, family, and preparing the home for a new arrival. When using standard recordable products, the rushed process often compromises the emotional depth of the message simply because there isn't time to pause and reflect. Our curated sessions intentionally remove the rush. We provide a peaceful, distraction-free sanctuary where mothers can step away from their busy routines, fully immerse themselves in the love for their newborn, and capture a deeply meaningful, lifelong keepsake.

The Portable Speaker and Sheet Music Print of Your Lullaby (included with the in person session)

    The Science Behind Our Methodology

    We use the scientific Method!

    The methodology behind our in person service and product was developed using the scientific method in which we made observations, formed a hypothesis, and conducted an experiment to test the validity of results.


    Grounded in Care, Proven by Science


    Our unique, in-person service was built from the ground up using a rigorous, data-driven approach. By combining careful observation with structured testing, we developed a process designed to perfectly support a mother's well-being. Every element of our experience has been carefully refined to ensure its validity, safety, and ultimate effectiveness.


    Our Ongoing Commitment to Quality


    At Heartbeat Tranquility, our scientific journey never stops. As our community grows, we continue to rely on data-driven methodologies and direct client feedback. This allows us to proactively anticipate variables, continuously enhance our service, and ensure we are always meeting the unique emotional and physiological needs of the families we serve.

    Research and References

    Click Below for a research article as well as numerous references supporting our Methodology.

    Click Here

    Meet The Founder

    Spencer Dahl - Founder and Visionary

    A lifelong musician driven by a passion for using the power of sound to heal and connect people. While studying Music Therapy at Seattle Pacific University, he was awarded a prestigious research grant to conduct a pilot study investigating the physiological benefits of maternal soundscapes for premature infants in the Neonatal Intensive Care Unit (NICU).

    His clinical study focused on developing a precise methodology: recording a mother's heartbeat and voice, then arranging them rhythmically on a continuous loop. This custom soundscape served as a natural sleep aid and a vital shield against the stressful, overstimulating auditory environment of the NICU.

    The Power of Prenatal Connection

    Spencer’s extensive review of medical literature revealed a profound physiological reality: between 24 and 32 weeks of gestation, a developing fetus forms associative memories within the hippocampus. The mother’s heartbeat and voice become deeply wired into the infant's brain as the ultimate signals of safety, comfort, and nurturing.

    Because a newborn already possesses this profound, instinctual connection to their mother before birth, maternal auditory stimulation remains the most effective, natural way to soothe and calm a baby after they are born.

    A Mission to Support Every Family

    Inspired by these powerful scientific findings, Spencer founded Heartbeat Tranquility to bring this clinical-grade, deeply moving experience to expecting mothers everywhere. His work allows families to capture a personalized heartbeat lullaby that serves as a beautiful, scientifically backed sleep aid for their newborns.

    As Heartbeat Tranquility grows, Spencer’s ultimate vision remains rooted in clinical care. A portion of the company’s growth will directly fund further medical research, with the long-term goal of implementing this restorative service in NICU departments worldwide to support the most vulnerable newborns.

    Contact Us

    Contact us if you have any questions or comments

    sd@heartbeattranquility.com 360-739-2401

    Hours

    Open today

    10:00 am – 05:00 pm

    Copyright © 2026 Heartbeat Tranquility - All Rights Reserved.

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