Where Breath Meets Voice: The Overlap of Myofunctional and Voice Therapy

As a once–tongue-tied singer, one question I return to often is: why did my voice find so much freedom after my tongue-tie release and myofunctional training? There is little formal research on this topic, so what I share here comes from a combination of my training, clinical work, and personal experience.

To be clear, I trained as a vocalist for years before pursuing a tongue-tie release. That training gave me invaluable skills, but eventually I reached a plateau. For that reason, I wouldn’t recommend a release as a first step for voice improvement alone—the research to support that choice isn’t there, and every person’s anatomy and response are unique. Skull structure, fascial connections, and muscle patterns all play a role. Still, for singers or speakers who have worked diligently and still feel “stuck,” release and retraining may be worth exploring.

Insurance and billing systems often separate voice therapy and myofunctional therapy into different specialties—one for sound, the other for oral function. But in practice, the two overlap constantly. The way we breathe, rest the tongue, and move oral muscles can shape how the voice functions—and sometimes whether it thrives or breaks down.

When Oral Function Impacts the Voice

Jaw tension and poor jaw–tongue dissociation are familiar struggles for vocalists. I’ve seen it again and again: when a student relaxes the jaw while activating specific tongue fibers, the sound that emerges often surprises them. Was that really my voice? The ability to move the tongue, jaw, and soft palate independently seems central to vocal freedom and resonance.

When restrictions or learned oral habits cause the tongue and jaw to move as a single unit, that freedom becomes harder to access. With myofunctional disorders, I often see patterns that appear to interfere with vocal ease, such as:

• The tongue tugging on the larynx, jaw, or floor of mouth with every movement
• The tongue sitting too low, reducing healthy back pressure for efficient phonation
• The tongue sitting correctly but only with extra floor-of-mouth tension
• Resonance instability, especially in transition zones, disrupting breath flow and causing fatigue
• A higher or less stable laryngeal position at baseline
• Underactive soft palate and pharyngeal muscles

Over time, I wonder if these imbalances may contribute to vocal fatigue or even phonotraumatic voice disorders such as nodules or chronic hoarseness.

Breath, Resonance, and Vocal Efficiency

The overlap between voice and oral function is especially clear in how the airway and resonance system interact.

Breathing

Poor nasal breathing—or habitual mouth breathing—can dry and fatigue the vocal folds. It also exposes the throat to more irritants, increasing the risk of inflammation. Shallow, rapid breathing often coincides with harsh onsets and a pressed voice.

I generally encourage my singing students to breathe through the nose whenever possible, since nasal breathing filters, warms, and humidifies air before it reaches the larynx. There are moments, of course, when mouth inhalation is beneficial—such as when time between phrases is short or when a singer is learning to shape the pharynx and soft palate for resonance. Once that coordination is established, the same resonance can usually occur with nasal breathing.

Overall, nasal breathing supports long-term vocal health and airway balance. Even outside singing, maintaining nasal breathing throughout daily life helps keep the throat tissues hydrated and resilient.

Resonance

The vocal tract is like the body of a guitar. When shaped well, it amplifies sound with ring and ease. But when the tongue sits too low or pulls against the jaw, resonance slips away—forcing singers and speakers to work harder. Pharyngeal stability matters too: if the larynx pops up and down with tongue movement, it pulls the system out of ideal resonance and destabilizes breath support.

Passaggi—the natural “gear shifts” in the voice—are particularly vulnerable. Without stable resonance, transitions feel like cliffs instead of smooth bridges.

This is why voice therapy often feels incomplete without considering the myofunctional layer—and why myofunctional therapy can fall short without addressing the voice.

Why This Matters for Singers, Teachers, and Everyday Talkers

For professional voice users with a myofunctional disorder—teachers, coaches, singers—consonants can be harder to manage than vowels. When the middle and posterior tongue fibers move freely, consonants can actually support vocal ease—each one becomes a mini semi-occluded vocal tract (SOVT) exercise that reconnects breath and resonance. But this only works when the tongue and soft palate move with freedom and alignment.

When mobility is restricted, each consonant movement may slightly shift resonance, forcing breath pressure to readjust to maintain pitch. My theory is that this creates a kind of micro “disconnect” from breath support, where the singer constantly has to recalibrate. Over time, these small fluctuations may lead to fatigue or pressing.

And it’s not just about sound. The voice carries identity and energy. When oral function limits vocal freedom, it affects how a person expresses themselves and how they feel in their own communication.

Moving Toward Integration

The good news is that habits can change. Myofunctional therapy builds healthier tongue and jaw patterns. Voice therapy refines resonance, breathing, and vocal efficiency—and together, they can restore a sense of coordination and ease that feels transformative.

I’m continually amazed by how freeing it feels to sing now. I can do so much more than I ever thought possible.

This crossover—where breath meets voice—is what excites me most: helping people uncover hidden patterns, restore ease, and rediscover what their voice can do when everything works together.

---

Optional Reading: For the Total Voice/Body Geeks

If you love understanding why things work—or you just geek out on anatomy—this section connects the science with what I observe in practice.

Tongue–Jaw–Larynx Connection

The tongue anchors to the hyoid through multiple muscles, including the genioglossus and hyoglossus (Garg et al.). The hyoid bone is structurally linked to the larynx via the thyrohyoid membrane and the thyrohyoid muscle, forming part of the hyoid–laryngeal complex (Garg et al.). Collectively, these anatomical relationships place the tongue, hyoid, and larynx within a shared structural system.

In my own experience before tongue-tie release, I couldn’t lift the back of my tongue without also engaging the floor of my mouth, which I believed in turn pulled on my hyoid bone and larynx. Since then, I’ve noticed similar patterns in some clients—particularly men with tongue restriction—and I’ve often wondered whether this reflects compensatory tension or deeper fascial and muscular ties associated with a tongue-tie. Based on these observations, I suspect that limited tongue mobility can influence laryngeal height and stability through this anatomical chain, though the specific functional dynamics during singing remain to be systematically studied. It makes me wonder how often these subtle muscular relationships between the tongue, hyoid, and larynx influence vocal stability without our realizing it.

Low Tongue Posture and Back Pressure

Myofunctional disorders are often linked to low tongue posture—when the tongue rests low instead of against the palate (Shah et al.). Semi-occluded vocal tract exercises, such as straw phonation, create gentle back pressure that improves efficiency and resonance (Titze et al., “Vocalization with Semi-Occluded Airways”).

In my experience, when the tongue rests slightly higher, it supports that same back-pressure principle by maintaining steadier intraoral impedance—almost like an internal version of SOVT.

Resonance Instability (My Theory)

This next part is entirely my own theory, drawn from what I know about voice science and what I’ve observed in singers and clients. The voice depends on a stable resonance system for ease and freedom, and resonance itself is shaped by the configuration of the vocal tract. It seems reasonable, then, that if the larynx moves every time the tongue moves, the vocal tract shape would shift too—potentially creating what I think of as resonance instability.

I’ve noticed that when resonance slips in and out of alignment, it also seems to disconnect the singer from steady breath support, because it takes a different amount of airflow and pressure to sustain a note on resonance versus off. To my knowledge, no research has examined this specific relationship, but it’s something I continue to observe and explore in practice.

Laryngeal Position and Imaging

The vocal tract functions as an acoustic filter whose resonances shape the spectral envelope of the voice. Changes in vocal tract configuration—including movements of the tongue, lips, jaw, and soft palate—modify these resonance frequencies, thereby influencing vocal timbre and acoustic output (Wolfe, Garnier, & Smith, 2009).

During pitch transitions such as the passaggio, singers rely on these biomechanical adjustments to keep the sound stable and connected. By modifying vowel space—that is, the shape and configuration of the vocal tract—singers can influence vocal tract resonances in ways that support the maintenance of a desired timbre across changes in pitch (Titze, Maxfield, & Walker, 2017).

Lowering the larynx changes how sound resonates in the vocal tract. In classical male singing, a lower larynx is paired with a wider space just above it (the hypopharynx). Together, these changes shift the voice’s resonance, especially affecting higher resonances linked to vocal ring (Mainka et al., 2015).

While the study examined only laryngeal lowering, basic acoustic principles tell us that shortening the vocal tract—such as would occur with laryngeal elevation—raises formant frequencies. Coordinating laryngeal position with tongue shape, pharyngeal space, and oral posture helps singers manage the acoustic shifts that naturally occur across their range.

To understand formants, a little background in the physics of sound is helpful. I tell my voice students that when we produce sound, we almost never generate just one pitch. For example, if a student sings the A at 220 Hz, the vocal folds vibrate 220 times per second—but additional vibrations occur simultaneously at multiples of that frequency (called harmonics), such as 440, 660, and 880 Hz. Formants are the frequency regions that the vocal tract naturally amplifies based on its shape.

Have you ever felt like you needed to “push” your voice to be heard? Instead of using force, you can often adjust the shape of your vocal tract—tongue and oral posture, pharyngeal space, laryngeal position—to make your voice louder with far less effort. That’s what formants do: they create resonant spaces where sound waves bounce and reinforce each other. These same resonant spaces also create beneficial back pressure, which helps stabilize airflow and laryngeal position.

When people first experience “singing into” their formants, they’re often surprised by how effortless the sound feels. Once you fall out of those resonant alignments, suddenly it takes much more breath and effort to produce the same pitch.

Now imagine that movements of the tongue are tied to laryngeal movements. Might they destabilize resonance? Might this create a sense of “falling over the tracks” or “losing the core of the voice” as a singer moves the tongue to articulate? And might this effect be intensified when singing through a vocal passaggio where resonant formants are already somewhat less stable? These are the questions I think about when I compare the stability of my voice now to before I got my tongue-tie released and began retraining the muscular patterns linked to my tongue-tie.

In smaller vocal tracts, like those often found in women, I suspect these shifts in laryngeal position that may be connected to tongue movements may have amplified acoustic effects—a personal theory based on observation rather than data, but one I find compelling.

Soft Palate and Pharyngeal Muscle Coordination

In my clinical work with myofunctional disorders, I often observe that the muscles in the back of the throat—including the soft palate and pharyngeal walls—appear to lack strength or coordination. Research on obstructive sleep apnea has identified “poor pharyngeal muscle responsiveness” as a key factor in airway collapse during sleep (Koka et al., 2021).

Myofunctional therapy uses “isotonic and isometric exercises targeted to oral and oropharyngeal structures, with the aim of increasing muscle tone, endurance, and coordinated movements of pharyngeal and peripharyngeal muscles” (Koka et al., 2021).

In other words, myofunctional therapy exercises the muscles in the back of the throat that help keep our airway open at night. Studies have shown that this approach reduces sleep apnea symptoms and improves airway function during sleep (Camacho et al., 2015).

references:

Camacho, M., et al. "Myofunctional Therapy to Treat Obstructive Sleep Apnea: A Systematic Review and Meta-analysis." Sleep, vol. 38, no. 5, 2015, pp. 669-675.

Garg, Rohin, et al. "Anatomy, Head and Neck: Hyoid Bone." StatPearls, StatPearls Publishing, 2025, https://www.ncbi.nlm.nih.gov/books/NBK539726/.

Koka, V., et al. "Orofacial Myofunctional Therapy in Obstructive Sleep Apnea Syndrome: A Pathophysiological Perspective." Medicina, vol. 57, no. 4, 2021, https://doi.org/10.3390/medicina57040323.

Mainka, Alexander et al. “Lower Vocal Tract Morphologic Adjustments Are Relevant for Voice Timbre in Singing.” PloS one vol. 10,7 e0132241. 17 Jul. 2015, doi:10.1371/journal.pone.0132241

Shah, Sejal S et al. “Orofacial Myofunctional Therapy in Tongue Thrust Habit: A Narrative Review.” International journal of clinical pediatric dentistry vol. 14,2 (2021): 298-303. doi:10.5005/jp-journals-10005-1926

Titze, Ingo R., Karen Maxfield, and Bennett Walker. “A Formant Range Profile for Singers.” Journal of Voice, vol. 31, no. 3, 2017, pp. 336.e1–336.e12. PubMed Central, https://pmc.ncbi.nlm.nih.gov/articles/PMC5409887/.

Titze, Ingo R., et al. "Vocalization with Semi-Occluded Airways Is Favorable for Optimizing Sound Production." PLOS Computational Biology, vol. 17, no. 3, 2021, e1008744, https://doi.org/10.1371/journal.pcbi.1008744.

Wolfe, Joe, Maëva Garnier, and John Smith. “Vocal Tract Resonances in Speech, Singing, and Playing Musical Wind Instruments.” HFSP Journal, vol. 3, no. 1, 2009, pp. 6–23. DOI: 10.2976/1.2998482.