
Try
this right now. Close your mouth. Take a breath. And just... hum for
a few seconds. Any note, any pitch.
Did
you do it?
If you
continue this for just 60 seconds, that's all, something
extraordinary is happening inside your skull... something that
scientists at Stanford, at Karolinska Institute in Sweden, at Harvard
Medical School have been quietly studying for the last 15 years.
Nature
hides things, sometimes right under your nose, or in this case,
inside your nose. When you discover it, you have to laugh because
it's been there the whole time... free, available, and nobody told
you.
Humming.
The silly little thing your grandmother did while cooking. This thing
children do without thinking. Humming is doing something to your
brain that pharmaceutical companies would charge you $400 a month for
if they could bottle it.
I'm
going to show you the chemistry, the physics, the biology, all of it.
And by the end, you'll understand why a Swedish research team called
humming the most under-rated neurological tool of the 21st century.
But
first, and this is important, I need you to stay with me because the
real surprise isn't what happens in the first 60 seconds. The real
surprise is what happens at minute 3 and then again at minute 7. Your
brain goes through stages and most people stop at stage one and never
feel the rest. So, let's begin properly.
I'm a
physicist by training, so forgive me. I have to start with the
physics because that's where the magic begins. When you hum, you're
not just making a sound. You're creating a vibration. And vibration,
my friend, is just physics. It's waves, it's frequency, it's energy
moving through matter. A typical human hum sits somewhere between 100
and 150 hertz. That means the air inside your nasal cavity, your
sinuses, your throat, is oscillating about 120 times every single
second... back and forth, back and forth, faster than your eye can
see.
And
here's the beautiful part, the part that made me sit up in my chair
when I first read the paper. Your skull, your sinuses, the bones of
your face have a resonant frequency, just like a wine glass, just
like a tuning fork. And that resonant frequency overlaps almost
perfectly with the frequency of a human hum. So when you hum, you're
not just making noise. You're literally, and I mean this
scientifically, you're literally massaging your own skull from the
inside. The vibration travels through bone, through tissue, through
fluid, and it reaches places no massage therapist could ever touch,
including, and this is where it gets interesting, including your
brain.
In
2002, a researcher named Eddie Whitesburg at the Karolinska Institute
in Stockholm did an experiment that nobody believed at first. He
measured the gas coming out of people's noses while they hummed.
Sounds ridiculous, right? Measuring nose gas. But what he found was
so unexpected that the paper got published in the American Journal of
Respiratory and Critical Care Medicine. And it's been replicated
dozens of times since.
He
found that when you hum, the amount of nitric oxide in your nasal
passages increases by 15 times. 15 times, not 15%... 15 times. That's
a 1500% increase. Nitric oxide is one of the most important molecules
in your body. It does three things, and all three are remarkable.
Number
one, it dilates your blood vessels. It opens them up, which means
more blood flow, more oxygen to your brain, to your heart, to every
cell.
Number
two, it kills bacteria and viruses. It's part of your immune system.
The Swedish team actually showed that high nasal nitric oxide is
associated with fewer respiratory infections. Some researchers, and
this is still being studied, believe humming for a few minutes a day
could reduce your chances of catching the common cold.
Number
three, and this is the one that gets me, nitric oxide acts as a
neurotransmitter inside your brain. It helps neurons communicate.
It's involved in memory formation, in learning, in thinking itself.
So when you hum, you're flooding your body vine in your brain with
one of the most important signaling molecules nature ever invented.
And it's free and it takes 60 seconds.
Now,
if I stopped here, you'd already have something useful. But I haven't
even told you about the vagus nerve yet. And this is where humming
becomes something close to a superpower. The vagus nerve is the
longest cranial nerve in your body. It starts at the base of your
brain in a region called the medulla and it wanders down. That's
actually what vagus means in Latin. It means wandering. It wanders
down through your neck into your chest, around your heart, down to
your lungs, your stomach, your intestines. It touches almost every
major organ. And it does something incredible. It's the main switch
between your fight-or-flight mode and your rest-and-digest mode. When
your vagus nerve is weak, what scientists call low vagal tone, you
feel anxious, you can't sleep, your digestion is bad, your heart rate
is high, your inflammation goes up, you age faster. When your vagal
tone is strong, the opposite is true. You're calm. You sleep deeply.
You recover from stress quickly. Your immune system works better.
Now,
here's the question that puzzled scientists for decades. How do you
strengthen the vagus nerve? You can't go to the gym and do vagus
nerve curls... can't take a pill for it. It seemed beyond our
reach... until they discovered this... the vagus nerve passes
directly behind your larynx, your voice box. And when you hum, the
vibration physically stimulates the vagus nerve from the inside
through the tissue.
A
study published in the International Journal of Yoga in 2011 measured
heart rate variability, which is the gold standard for measuring
vagal tone, in people before and after humming for just 5 minutes.
The increase was dramatic, comparable to what you'd see after a full
meditation session. 5 minutes of humming gave the same nervous system
benefit as 20 minutes of meditation.
I want
you to sit with that for a moment. Okay, let's get specific. The
title of this post promised you 60 seconds. So, let me walk you
through second by second what's happening inside your head.
Seconds
0 to 10, you begin humming. Immediately your vocal cords start
vibrating at around 110 to 130 hertz. The vibration travels up
through your throat into your nasal cavity into your sinuses.
Pressure changes. Air molecules in your sinuses begin oscillating.
Seconds
10 to 20, nitric oxide production in your paranasal sinuses spikes.
By the 20th second, levels are already 5 to 7 times higher
than normal. This nitric oxide begins to mix with the air you're
breathing in through your nose and travels down into your lungs.
Seconds
20 to 30 in your lungs, the nitric oxide causes the tiny blood
vessels surrounding your alveoli, the little air sacks, to dilate.
Oxygen absorption increases. Within 30 seconds of humming, the oxygen
content in your blood measurably rises.
Seconds
30 to 40, that oxygenated nitric oxide rich blood reaches your brain.
Cerebral blood flow increases. The pre-frontal cortex, the part of
you that thinks, plans, decides, gets a fresh wave of fuel.
Seconds
40 to 50. Your vagus nerve has now been receiving steady mechanical
stimulation. It sends signals up to a structure in your brain stem
called the nucleus tractus solitarius which then signals the rest of
your brain to release calming neuro-transmitters GABA, serotonin,
acetylcholine.
Seconds
50 to 60, your heart rate begins to slow. Your heart rate variability
increases. Cortisol, your stress hormone, begins to drop. Brain wave
activity shifts. EEG studies show an increase in alpha waves, the
brain waves associated with relaxed alertness... the same brain waves
seen in experienced meditators.
All of
this in 60 seconds from humming.
Now,
here's something funny... something that frankly made me a little
humble when I read it. Everything I just told you... the nitric
oxide, the vagus nerve, the brain waves... western science discovered
all of this in only the last 20 or 30 years. But humming has been
used as a healing practice for at least 3,000 years.
In
ancient India, there's a yogic technique called bhramari pranayama...
the bee breath. You close your eyes, you cover your ears, and you hum
like a bee. Long sustained hums. Practitioners have claimed for
millennia that it calms the mind, sharpens memory, and improves
sleep.
In
Tibetan Buddhism, monks chant, which is essentially a long resonant
hum. They claim it produces clarity, focus, deep peace. In Sufi
traditions in the Middle East, there are humming meditations called
Zika that have been practiced for over a thousand years. In Gregorian
chant, the music of European monasteries, there's a sustained
resonant tone very close to humming that monks performed for hours
each day.
There's
a famous story about a French monastery in the 1960s where the monks
were ordered by a new abbot to stop their daily chanting. Within
months, the monks became exhausted, depressed, and sick. A doctor
named Alfred Tomatis was brought in. He reintroduced the chanting and
the monks recovered.
How
did all these traditions separated by oceans, by religions, by
thousands of years... how did they all arrive at the same conclusion?
That making this specific sound with your own body was somehow
medicine?
Well,
that's the thing about nature. The truth is the truth. Whether you
find it in a laboratory in Stockholm or in a cave in the Himalayas,
the vagus nerve doesn't care what century you live in.
Now, I
want to tell you about something even stranger... something that
surprised even the researchers. In 2016, a study at Northwestern
University looked at humming and memory consolidation. They had
participants memorize a list of words. The Hummers remembered
significantly more words... not a small difference, but a measurable,
statistically significant difference. Why? The leading theory is
this: Humming stimulates the hippocampus, the part of your brain that
converts short-term memories into long-term memories. The vibration
combined with increased blood flow combined with the vagal
stimulation seems to create ideal conditions for memory encoding.
There's
another study from 2020 that looked at humming and focus.
Participants hummed for just 3 minutes before a difficult cognitive
task. They performed measurably better than the control group. Their
reaction times were faster. Their error rates were lower.
Of
course, you think more clearly afterward. Some of the top performers
in the world have figured this out instinctively. Opera singers,
public speakers, athletes, many of them hum before they perform. They
didn't read the studies. They just knew. Their body told them. But I
want to be honest with you because I'm a scientist. And a scientist's
job is to tell you the whole truth, not just the comfortable part.
There
are some things about humming you should know. First, it's not magic.
If you have a serious medical condition... depression, anxiety
disorder, chronic illness... humming is not a replacement for
treatment. It's a tool, a useful tool, but still a tool.
Now, I
want to tell you about something even stranger... something that
surprised even the researchers. In 2016, a study at Northwestern
University looked at humming and memory consolidation. They had
participants memorize a list of words. Most people do it wrong. They
hum too softly. They don't sustain the note. They breathe shallowly.
The research shows the benefits come from deep diaphragmatic
breathing combined with sustained humming.
You
inhale slowly through your nose for about 4 seconds. Then you hum out
for as long as you comfortably can... 8... 10... 12 seconds. Then
repeat.
Then
this is the one nobody talks about. There is one group of people who
should be careful. If you have a current sinus infection or severe
sinusitis, vigorous humming can sometimes worsen the inflammation. In
those cases, gentler practice is recommended. But for the vast
majority of people, humming is one of the safest, cheapest, most
powerful interventions available and it costs nothing.
So,
let me give you something practical, because I don't want this to be
just information. I want you to actually use this. Here is the reset
protocol that emerges from the research. Step one, sit comfortably,
spine straight but not rigid, shoulders relaxed, eyes closed if you
like. Step two, inhale slowly through your nose, 4 seconds, feel your
belly first, then your chest. Don't gasp, breathe smooth. Step three,
as you exhale, hum. Lips closed, teeth slightly apart. Pick a note
that feels comfortable somewhere in your lower middle range. Sustain
it. Let it vibrate through your face, through your skull. You should
feel a slight tingling in your lips, your cheeks, your forehead. That
tingling is the vibration physically affecting your tissues. Step
four, hum until your breath naturally runs out. Don't force it. Maybe
8 seconds, maybe 12, whatever is comfortable. Step five, pause for 2
seconds, then repeat.
Do
this for 5 minutes. Just 5 minutes. Once in the morning, once before
bed if you can. After one week, and I'm telling you this from
personal experience and from what the research suggests, you'll start
to notice it. After one week, and I'm telling you this from personal
experience, and from what the research suggests, you'll start to
notice it. Your sleep will be deeper. You'll feel slightly calmer.
Your mind will feel clearer. After one month, the people around you
will start to notice.
Now, I
want to step back because there's a bigger lesson here... a lesson
that goes beyond humming. We live in a strange time. We're surrounded
by problems... stress, anxiety, sleeplessness, lack of focus... and
we've been taught to solve them with things we have to buy. But most
may b solved with just a sound you can already make, a sound you knew
how to make before you could even speak. This is the part that gets
me.
This
is the part that makes me love science. Because science at its best
isn't about creating new things. Sometimes it's about uncovering
things that were already there, things our ancestors knew, things our
bodies knew, things we forgot. The Swedish researcher Eddie
Whitesburg, when he was asked about his discovery, said something
I've never forgotten... "Sometimes the most important medicines
are the ones you make yourself.”
You
have sitting inside your throat a pharmacy. A pharmacy that produces
nitric oxide, that stimulates your vagus nerve, that floods your
brain with calming neuro-transmitters, that boosts your memory, that
fights infection, that lowers your blood pressure, that improves your
sleep. And the prescription is 60 seconds of humming.
So,
where does that leave us? I think it leaves us with a choice. You
move past this post and forget everything I said. That's fine. most
people will. Or, and I hope you'll do this... you can try it. Because
here's the thing. You can listen to me talk about nitric oxide and
vagus nerves and brain waves all day, but until you feel it, until
your own body shows you... these words are just words.
Nature,
my friend, doesn't argue. It demonstrates. So hum 60 seconds... then
when you feel it, when you feel that strange quiet calm spread
through your chest, that slight tingle in your face, that little
shift in your mind, come back, revisit this post, and you'll
understand it... not with your head, but with your body. Because
that, in the end, is what science is. It's not memorizing facts. It's
not believing experts. It's experiencing truth for yourself. And the
most beautiful experiment you'll ever run is the one happening inside
you right now.
by
Richard Feynman on You Tube at PsychologysExplainer on May 12, 2026