Your Voice Is Part of Your Nervous System

By Isaac Koren, Thorald Koren, and Eileen McKusick

Most people don’t like the sound of their own voice. We think that’s important information.

Somewhere along the way, it became normal for people to cringe when hearing themselves speak or sing. People apologize for their voices all the time. They say they are tone deaf, that they can’t sing, that they should probably stay quiet. But the truth is that the voice is not just a performance instrument, it is part of the human regulatory system, and when people disconnect from it, they often disconnect from themselves.

We each arrived at this understanding from very different directions.

Eileen McKusick spent decades researching the relationship between sound, the nervous system, the human biofield, and health after becoming fascinated by what sound was actually doing inside the body. Ironically, she had been told repeatedly as a young person that she was tone deaf. Instead of trying harder to become a singer, she became more interested in listening—listening to how the sounds of tuning forks and voices changed under stress, grief, fear, exhaustion, confidence, and healing.

Meanwhile, Isaac Koren and Thorald Koren spent decades immersed in singing, harmony, improvisation, songwriting, vocal coaching, and the emotional power of song.

Over time, the brothers focus shifted away from performance and toward something much more interesting: helping others to discover what happens when they stop trying to sound good and start using the voice as a way to reconnect with the body, the breath, emotion, and each other.

Different paths, same realization: the voice belongs to everyone.

One of the first things people notice when they begin working this way is that the voice reflects their internal state almost instantly. Under stress, the voice tightens. It rises in pitch, loses resonance, becomes thin, shaky, or disappears altogether. Many people unconsciously disconnect from the lower parts of their range when they are frightened, overwhelmed, ashamed, or trying to hold themselves together emotionally.

The opposite is true too. When people relax, soften, feel safe, or become more fully present, the voice changes immediately. It deepens. Opens. Gains warmth and flexibility. The body broadcasts its condition constantly through the voice.

This makes sense physiologically. The vagus nerve, one of the primary regulators of the parasympathetic nervous system, interfaces directly with the larynx and vocal apparatus. Humming, toning, chanting, sighing, and singing all stimulate the nervous system through vibration and breath. Research on group singing has shown measurable effects on stress hormones, immune markers, emotional regulation, and social bonding, but honestly, most people recognize the effect directly. A room full of people singing together simply feels different. Something reorganizes.

A central understanding within our work is that the body is not merely chemical. It is electrical and electromagnetic. Fascia, collagen, bone, and connective tissue are piezoelectric, meaning they generate electrical charge when mechanically vibrated or stressed. Sound is mechanical vibration, so when the voice moves through the body, it is not “just auditory,” It is interacting with an electrically conductive system.

When we say Singing the Body Electric, we mean that literally.

The voice changes breathing, stimulates tissue, affects circulation, shifts nervous system state, and influences emotion. In Eileen’s work mapping the human biofield, unresolved stress patterns consistently appeared to organize themselves spatially in the field surrounding the body. Again and again, sound reached places that conversation alone could not. People would hum or tone and immediately begin laughing, crying, trembling, remembering, softening, or feeling energy move.

The body recognizes sound as information.

One of the misconceptions we often encounter is the idea that healing means becoming tension-free. Healthy systems actually require tension. The vocal cords themselves depend on tension in order to create sound. Muscles require tone. Fascia relies upon balanced tensile relationships throughout the body. The issue is not tension itself, but chronic, unconscious tension that loses flexibility and adaptability.

Healthy systems pulse. They contract and release, activate and recover, expand and return. Every time we tone consciously, we are practicing that relationship. Not rigidity, but responsiveness. That adaptability is deeply connected to vitality.

Over many years of exploration, we began recognizing consistent relationships between certain tones and certain regions of the body and biofield. What emerged became the Sonic Anatomy: 42 tones and demitones corresponding to different zones and chambers within the body. The system did not arise because we sat down and tried to invent it. It emerged gradually through curiosity, experimentation, listening, and play. The same is true for the Tone-ics: combinations of sound, breath, awareness, and intention that help people access different physiological and emotional states.

None of this came through force; it came through participation.

Again and again, the deepest healing experiences happened when people stopped trying to “do it right” and simply became curious enough to make sound honestly.

You do not need training to begin. You do not need to perform. You do not even need to sound good.

Take a breath in and softly sigh “ahhh” on the exhale. Hum a low MMM and feel the vibration move through the chest, throat, jaw, and skull. Sing “eye-eee” slowly and notice whether you can feel the sound extending beyond the skin into the space around you.

Simple things. Ancient things. Human things.

Over the years, we have worked with thousands of people who believed they could not sing or had somehow lost access to their voice entirely. Again and again, we have watched those same people reconnect with confidence, vitality, emotional expression, joy, grief, playfulness, power, and genuine connection through something as simple as making sound together.

The voice does not need to be perfected before it becomes useful. It is already a feedback system, a regulator, a vibrational instrument, and one of the most immediate pathways back into relationship with yourself.

And you were born with it.