No study shows that tuning forks directly stimulate the vagus nerve. What a fork can do is give you a steady sound and a gentle vibration to focus on while you breathe slowly, and slow breathing is the part with real research behind it. Used that way, a weighted 128 Hz fork or the Harmony Set can be a calming, low-risk addition to a relaxation routine.
If you've seen claims online that a tuning fork "resets" the vagus nerve in seconds, this guide is the grounded version. It covers what the vagus nerve is, what research does and doesn't say about vibration, how to use forks safely, and which frequencies people choose.
What is the Vagus Nerve?
The vagus nerve is the tenth cranial nerve and the longest in your body. It starts in the brainstem and travels down through the neck, chest and abdomen, connecting the brain with organs such as the heart, lungs and gut. It plays a big part in the body's "rest and digest" side, which slows the heart, supports digestion and helps you recover after stress.
Researchers often use heart rate variability (HRV), the small beat-to-beat changes in your heartbeat, as an indirect measure of how active this system is. Higher vagal activity is generally associated with better recovery from stress, though HRV is a rough proxy, not a direct reading of the nerve.
A couple of anatomy points are worth clearing up, because they're often misstated. First, the vagus runs deep in the neck, not just under the skin, so a fork resting on your chest or neck isn't "touching" it. Second, its small auricular branch does supply part of the ear. Cadaver studies describe it reaching the wall of the ear canal, but whether it supplies the tragus (the small flap at the front of the ear) is disputed, and some researchers argue the evidence for that is still premature.
Signs Your Body May Be in a High-alert State
Everyone's stress response looks a little different. Common signs include:
- Racing thoughts or a feeling of being "on edge"
- Rapid or shallow breathing
- A faster heartbeat
- Tension in the neck, shoulders, chest or jaw
- Trouble switching off or falling asleep
- Being easily startled, restless or irritable
- Difficulty concentrating
These signs have many possible causes, including stress, poor sleep, caffeine, medical conditions and anxiety. If they're frequent, intense or getting in the way of daily life, it's worth talking to a doctor. For some people, stress can also make tinnitus feel louder.
Do Tuning Forks Really Stimulate the Vagus Nerve?
Let's look at what's actually been tested.
Medical Vagus Nerve Stimulation (VNS) is a Different Thing
According to the Mayo Clinic, it involves using a device to send electrical impulses to the vagus nerve, and the FDA has approved devices for conditions including epilepsy, depression, stroke rehabilitation and, with a noninvasive device, cluster headaches and migraine. Those are prescribed medical treatments, and a tuning fork is not one.
Vibration of the Ear Has Been Studied, But At Much Lower Frequencies
A small pilot study in seven patients with epilepsy tested vibration of the outer ear at 2, 6, 12, 20 and 40 Hz, and found it induced significant low-frequency coherence increases involving several limbic system structures. That's an early, interesting signal, but those frequencies are far below a 128 Hz or 256 Hz fork, and it was a device, not a fork.
Low-frequency Vibration Sessions Have Shown Small Effects on Vagal Markers
A 2025 study had healthy, regularly active men lie in front of bass speakers for a standardized 40-minute low-frequency sound session, and reported that vagal tone was improved 30 minutes after the session. That's a speaker-based, 40-minute whole-body session in a small group, which is very different from a few seconds of a hand-held fork.
For the full comparison, see our guide to vibroacoustic therapy vs. tuning forks.
Tuning Forks Themselves Haven't Been Tested For This
As far as we can find, no trial has measured whether hand-held forks change vagal activity. The closest fork-based research is a small 2023 study of "Biofield Tuning," a one-group feasibility study of 15 people that reported reductions in anxiety, negative affect and perceived stress. It's promising, but it had no control group and it didn't measure the vagus nerve.
So where does that leave us? Plausible, but unproven. If anyone tells you a fork "activates" or "resets" your vagus nerve, they're ahead of the evidence. We'd rather you know that and still choose forks for what they can offer.
Why Sound and Vibration May Help You Relax
The better question is not "does it hit the nerve?" but "does it help me settle?" For many people, a fork does, and there are sensible reasons:
- It gives your attention an anchor: A single clear tone, or a hum you can feel, is easy to follow, which can quiet looping thoughts
- It gives your body something to feel: Gentle vibration against the chest, shoulders or jaw draws your attention to where you hold tension
- It pairs well with slow breathing: A fork ringing for 20 to 60 seconds is a natural timer for a long, slow breath
- It creates a ritual: A few quiet minutes with a familiar routine tells your body it's time to slow down
The breathing part has the strongest evidence. A 2022 systematic review and meta-analysis by Laborde and colleagues looked at 223 studies and found increases in vagally mediated heart rate variability with voluntary slow breathing, during the session, immediately after it, and after multi-session programs. The authors suggest slow breathing could be advised as a low-tech and low-cost technique, with few adverse effects expected.
In other words, a fork may help you do the thing that works, which is to slow down and breathe, and that's a perfectly good reason to use one. For a neutral overview of how vibration is used more broadly, Healthline's guide to vibration therapy notes that more research is needed on the potential health benefits and risks.
Which Tuning Fork Frequencies Do People Use For Relaxation?
There's no proven "vagus frequency." People choose by feel: a deeper vibration or a clearer tone. Here are the ones most often used.
- 128 Hz: a grounding vibration for the body. The 128 Hz "Muscle & Joint Reset" Fork is a low-pitched, weighted fork whose vibration is easy to feel. Clinicians also use a 128 Hz fork to test vibration sense in neurological exams. For relaxation, people rest it lightly on the upper back, shoulders or chest, and use the steady sensation as a focus during slow breathing.
- 256 Hz: a clear tone for focused listening. The 256 Hz "Mental Clarity" Fork is an unweighted fork with a higher, clearer tone. Held near the ears, it gives you a sound to follow as it begins, rings and fades, which can help redirect attention from racing thoughts.
- 432 Hz: a softer tone for winding down. The 432 Hz "Natural Tuning" Fork has a mellow tone that many people like in an evening routine. There's no good evidence that 432 Hz does anything other frequencies don't, so choose it if you like the sound.
- 136.1 Hz: a low, steady "OM" tone. The 136.1 Hz "Earth OM" Fork is a weighted fork often used for grounding and slow breathing. Its link to the "Earth year" is part of its traditional use, not evidence of an effect on the vagus nerve. Check out the benefits of 136.1 Hz frequency.
- The Harmony Set: If you'd like to try several tones, the Harmony Set combines 128, 136.1, 256 and 384 Hz, so you can explore both felt vibration and listening tones in one routine. Start with one fork at a time, notice which tone and sensation help you settle, and build from there.
Safety First: Read This Before the Routines
- Neck: Major blood vessels and nerves run through the front and sides of the neck. Keep contact light, avoid pressure on the front and sides, and never place a fork on the throat.
- Implanted devices (pacemaker, defibrillator, insulin pump, spinal stimulator or similar): avoid the chest, and avoid placing a fork directly over or near a device or its implant site, without medical guidance. Implants differ, so ask your clinician about yours.
- Heart conditions or a history of fainting: check with your doctor first.
- Pregnancy: avoid placing a weighted fork on the abdomen, especially in the first trimester, and ask your clinician about other placements.
- Never insert a fork into the ear canal, and keep the tone comfortable near your ears.
- Stop if you feel lightheaded, uncomfortable or notice any unwanted symptom.
Simple Routines to Pair with Slow Breathing
You don't need complicated protocols. Strike the fork gently on the rubber activator or your knee, keep contact light, and breathe slowly and comfortably without forcing deep breaths. Most people start with sessions of 5 to 10 minutes, and try them every other day at first.
A 5-minute Reset
- 128 Hz on the sternum or upper chest (60 to 90 seconds). Skip this step if you have a pacemaker or other implanted device unless your clinician has cleared it.
- 128 Hz on the upper back or the muscle between the neck and shoulder (about 60 seconds). Keep the pressure light, and avoid the front and sides of the neck.
- 256 Hz near each ear (30 to 45 seconds per side). Hold the fork about 2 to 4 inches (5 to 10 cm) away, never in the ear canal.
- Breathe slowly while each fork rings, and notice whether your shoulders, jaw or breathing soften.
A Before-sleep Routine
- 128 Hz on the chest (about 2 minutes), with the same implanted-device caution as above.
- 432 Hz near the ears (1 to 2 minutes), held a few inches away.
- Slow breathing for another minute, with the room quiet and the lights dimmed.
Pair it with consistent bedtime habits. Pay attention to whether the routine feels relaxing, instead of expecting it to treat anxiety or insomnia. If you're struggling with either, a doctor can help.
If Stress Makes Your Ringing Worse
Some people find tinnitus is louder when they're tense. A gentle 128 Hz fork along the jaw, a 256 Hz fork near (not touching) the ears, and slow breathing can be part of a calming routine.
Not Sure Which Fork to Start With?
- Want the simplest way to try the full range → the Harmony Set
- Still deciding → take our free assessment and we'll point you to the right fork
- Want help with placement → the Pure Rituals app offers guided audio that shows you where to place each fork and how long to hold it
Every order is covered by our 60-day money-back guarantee.
Other Ways to Support Vagal Tone Naturally
If you'd like to build a wider routine, these are commonly used, and they don't need a fork. The strength of the evidence varies:
- Slow, diaphragmatic breathing, as this is the best-supported option, per the review above
- Humming, chanting or singing, which lengthens the exhale and is often used for the same reason
- Meditation and mindfulness
- Gentle yoga and regular physical activity
- Cold water on the face, which some people find helps them settle
- Gentle neck, shoulder and chest massage
For people with certain conditions such as epilepsy or depression that hasn't responded to other treatment, medical vagus nerve stimulation is an option, but that's a prescribed treatment you'd discuss with a specialist. Read more at Mayo Clinic.
The Bottom Line
Tuning forks aren't proven to stimulate the vagus nerve, and we'd be wary of anyone who says otherwise. They can, however, give you a calm, structured way to slow down, feel your body and breathe, and that's worth something. If you'd like to try it, start with one fork and 5 to 10 minutes. The Harmony Set is the easiest way to explore both vibration and listening tones, with a 60-day guarantee behind it.
This article is for general information and does not replace medical advice. Pure Frequencies tuning forks are not intended to diagnose, treat, cure or prevent any disease. Individual results vary.
Sources: Laborde et al., Neurosci Biobehav Rev, 2022 · Mayo Clinic: Vagus nerve stimulation · The anatomy of the auricular branch of the vagus nerve, J Anat, 2019 · Heart rate variability response to low-frequency sound vibrations, Front Sports Act Living, 2025 · Vibrotactile auricular vagus nerve stimulation pilot study, PLoS One · Jain et al., Complement Ther Med, 2023 · Healthline: Vibration therapy
