The Sound That Isn't Supposed to Be There

I came across this whole idea by accident, the way most important things arrive. A few years ago I watched a video by Sandeep Maheshwari called The Sound of Silence¹, expecting another motivational talk, and instead found him describing an internal sound, constant, high-pitched, not coming from the ears or the room, that he claimed most people carry with them their whole lives without ever noticing it. He frames his own contribution as the experience side of this, here's the sound, go find it for yourself, and Advaita as the knowledge side, here's what that sound is actually pointing toward. I want to hold onto that division carefully in this piece, because I think it's doing more work than it looks like at first, and I don't think the two sides land in quite the place he suggests.

I tried the meditation he describes more than once. On my better attempts, I got to a state where that sound was the only thing present, no thoughts, no body sensation I could identify, nothing else. I want to be honest about what I don't know here: I have no idea whether the observer actually dissolved into the observed in that moment, or whether I just got very quiet and focused on one very subtle object instead of many loud ones. I doubt it was samadhi in any of the senses the texts describe. Samadhi, from everything I've read for this series, is not that easy, and I'd rather underclaim than dress up a good meditation session as something it probably wasn't.

What I can say with more confidence: I hear this sound most of the time now, including right now, while writing this sentence. It comes and goes with attention, if I stop specifically listening for it, it fades from awareness, though I can't tell you whether it stops occurring or just stops being noticed, which turns out to be a real and important distinction I'll come back to. I've never been able to verify whether it's present in dreams or in deep sleep, for the obvious reason that I'm not in a position to check while I'm in either state. And I'm fairly confident it isn't ordinary tinnitus, partly because of my own sense of its quality, and partly because Sandeep has publicly presented survey research claiming a large share of people, including young children with no history of hearing damage, report something similar². I want to take that claim seriously without taking it uncritically, which is most of what this piece is actually about.

The problem this immediately creates

Here's the tension I actually want to work through, and I don't think it's a small one. Back in the definitions piece, I landed on treating consciousness as awareness itself, not a level, not a capacity, something distinct from any particular content it happens to be filled with. A sound, however subtle, however unusual, is content. It's a specific, describable, attendable thing, exactly the kind of thing I explicitly set awareness apart from. So if Anahata Nada is a sound, in what sense could it possibly be a doorway to pure awareness, rather than just one more object, admittedly a strange and interesting one, occupying the same category as every ordinary thought I was trying to get underneath?

Sandeep's own account complicates this further rather than resolving it. He argues that children hear this sound more easily because their body-mind instrument hasn't yet accumulated the conditioning, the mental noise, that buries it in most adults, and that meditation is essentially the work of clearing that noise back out until the sound becomes audible again. I think this may well be true as a description of what's happening. But notice what it implies: if the sound needs a cleared instrument to become perceptible, that already tells you it's a signal being filtered by the instrument, not the source doing the filtering. A field, in the sense If Consciousness Is Reflected, What Is Doing the Reflecting? used the word, is supposed to be what the instrument reflects. This description makes Nada sound like a property of how clearly the instrument is currently reflecting, not like the field itself.

What the actual textual tradition says, and it surprised me

I expected the classical Nada Yoga texts to simply equate the sound with the absolute, since that's how it's often presented in popular spiritual content. They don't, and the actual position is more careful than I expected.

The Hamsa Upanishad and the Hatha Yoga Pradipika both describe Anahata Nada not as a single, static tone but as a graded sequence, moving from grosser to subtler sounds, drums and conches in the early stages, giving way eventually to sounds like a flute, a vina, or bees humming, as practice deepens³. The explicit instruction across these texts is to use each stage as a support for withdrawing attention from the external senses, and then to let the mind absorb into progressively subtler layers of the sound itself, rather than to stop at any one layer and call it the destination. The Hatha Yoga Pradipika's fourth chapter is explicit that the goal of this entire practice, called laya, absorption, is to reach a state beyond mind altogether, unmani, and that the sound is described repeatedly as the vehicle for getting there, not as the place itself⁴. The Nada Bindu Upanishad states this most directly, in a line that reframed the whole question for me: "the mind exists so long as there is sound, but with its cessation there is the state called Unmani," the state beyond mind⁵. That's the text explicitly saying the sound has to stop too. Not just gross thought. The subtle sound as well. What's left after that cessation is what the tradition is actually pointing at.

This resolves the tension I opened with, at least on the tradition's own terms, and I think it's a real resolution rather than a convenient one. Anahata Nada isn't being presented, in the source material, as identical to pure awareness. It's being presented as the last rung of a ladder made of content, the subtlest object the mind can still hold before there's no object left to hold at all. Hearing it clearly is evidence that the instrument has been quieted a great deal, since it takes a very still mind to notice something that faint underneath everything louder. It is not, on the tradition's own account, evidence that the mind has actually let go of the ladder yet. I think this is likely the honest answer to my own doubt about whether I've experienced anything like samadhi: probably not, because by every classical description, the real thing happens after the sound too, not during it.

A concrete way to hold this, and where it might mislead

The clearest analogy I've found for myself, since the texts speak in centuries-old imagery I have to translate for my own thinking: a fan running in a loud room is inaudible, not because it stops making sound, but because everything else drowns it out. In a completely silent room, the same fan's hum becomes obvious. Hearing that hum for the first time doesn't put you in contact with electricity itself, the underlying thing actually powering the fan. It puts you in contact with the machine's own quietest, most persistent operating note, one layer closer to the source than the noise was, but still the machine, not the power behind it. I think this is a closer description of what listening to Anahata Nada may actually be than Sandeep's own framing, which tends to describe the sound directly as "the vibration of oneself, God, the universe"⁶. The classical texts, read carefully, seem to agree with the more modest version: it's the instrument's own subtlest hum, evidence you've quieted almost everything else, not the current running through it.

Is there anything science has actually found here?

This is worth researching honestly rather than either dismissing outright or accepting on faith, and the answer turns out to be genuinely interesting, if more modest than either side of the popular debate usually claims.

Ordinary subjective tinnitus, a ringing or hissing tied to hearing damage, is the default medical explanation for internal sound, and it typically correlates with noise exposure or age-related hearing loss, which is exactly why Sandeep and others argue it doesn't fit cases involving young, healthy children. But there's a second, less commonly discussed phenomenon in the audiology literature that fits several features of this description surprisingly well: spontaneous otoacoustic emissions, or SOAEs, real, physical, measurable sounds generated by the outer hair cells of the cochlea itself, detectable with a sensitive microphone in the ear canal, occurring with no external stimulus and independent of hearing damage⁷. SOAEs are common, present in roughly 35 to 75 percent of people with normal hearing depending on measurement conditions, frequency-stable over years in a given ear, and entirely unrelated to age-related decline⁸. Most people never consciously notice their own, but a small minority, somewhere between 1 and 9 percent of people according to clinical estimates, do perceive their SOAE as an audible internal tone⁹. This is, as far as I can find, the closest thing that currently exists to a scientifically confirmed, measurable, real vibration that at least some people genuinely hear coming from inside themselves, entirely independent of any pathology.

I want to be precise about what this does and doesn't establish, because it would be easy to overstate in either direction. It's a real, physical, externally measurable phenomenon, which is more than I expected to find, and it directly explains why a healthy child with undamaged hearing could genuinely perceive a persistent internal tone. But it doesn't obviously explain the specific, structured, cross-cultural phenomenology the classical texts describe, a progression through drum, conch, bell, flute, and humming bees as practice deepens, since SOAEs are frequency-stable rather than something that shifts in character with meditative progress. And I have to flag something else directly: Sandeep's own survey claims about prevalence come from an internally published report on his own website, not peer-reviewed audiology research, so I can vouch for the peer-reviewed SOAE literature but not for the specific numbers in his own claims². My honest read is that SOAEs are very likely the physiological substrate underneath at least some of what gets reported as Anahata Nada, particularly the simplest, most tone-like cases, while the deeper, progressively subtler experience the texts describe may be something the physiology only partially accounts for.

The deep sleep problem, revisited

I raised this as an open puzzle in If Consciousness Is Reflected, What Is Doing the Reflecting?: if Nada points toward the consciousness field, why can't I verify it persists through dreams or deep sleep, and is that a limitation of the instrument or evidence against the whole idea? I think the resolution here is actually simpler than I made it sound, once the ladder-not-destination reading is taken seriously. If Anahata Nada is content, even extremely subtle content, then it shouldn't be expected to survive into a genuinely content-free state any more than a thought or a body sensation should. Its absence from deep sleep isn't a mysterious failure of the instrument to reflect the field properly. It's exactly what the theory predicts, if the theory is right that even this sound has to drop away before what's actually content-free is reached. The puzzle dissolves once I stop treating the sound as a stand-in for the field itself.

The sharper question: can awareness ever hear itself?

This is the part of the question I think cuts deepest, and it connects directly back to the Drig-Drishya Viveka method from If Consciousness Is Reflected, What Is Doing the Reflecting?: if some future consciousness-measuring tool did detect a specific vibration correlated with this experience, what would that actually prove? I don't think it could ever be a measurement of awareness itself, for the same structural reason an eye can't see itself. Any measured vibration would be an object, something awareness is aware of, exactly the same category as a brainwave, a heartbeat, or a photon hitting a retina. Awareness is, on every account this series has taken seriously, whatever is doing the detecting, never a thing that gets detected. A hypothetical instrument finding "the Anahata Nada frequency" would be doing exactly what an EEG already does for ordinary experience, finding a correlate of the state, not the experiencing itself. I think this was the real category error sitting underneath my own confusion, and probably underneath a fair amount of how this sound gets talked about more broadly, treating the clearest, subtlest object the mind has ever found as though clarity and subtlety alone could eventually turn an object into the subject perceiving it. I don't think they can, no matter how far the sequence of drums, bells, and flutes goes. Something has to actually stop being heard, and someone has to actually stop being the one listening for anything, on the classical account, before what's left is done being an object at all.

I still hear it as I finish writing this. I don't think that means anything has been proven. I think it means I've located the last rung, and that the honest next question, the one I don't have an answer to yet, is what it would actually take to let go of it rather than keep listening more closely.