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You wouldn't hear it even if it was. Your speakers may not be able to output it either.
Did you watch it? What do you think it is or what do you make of it?
Hear for yourself? It does sound very low tho, like rumbly and relaxing. I definitely hear it as well as feel it so lets take that off the table
Human hearing range is 20hz to 20kHz. That you can hear it doesnt mean that you can hear "0.33hz", more likely that its not actually that frequency.
I can hear that video, but using a tone generator, I can only hear clicks and pops from my phones speakers. So it's probably lying about its frequency.
YouTube compression will remove inaudible sound ranges anyway, so they probably had to fake something for it to make a sound at all.
Ohhh now that one is interesting. I actually can hear it set to 1hz, but its not 1hz that I am hearing. Rather a higher pitched whine that cycles at 1hz. Similar happens for other very low frequencies and changes the frequency of the whine. I presume it is my speakers struggling with playing very low frequencies.
Along with adjusting volume, every low frequency can be heard but it moves from hearing an actual low frequency to hearing the speakers movements and then really low it whines.
Are you perhaps hearing a 50/60hz signal from your electrical grid? If its higher, could possibly be frequency from your processor (or some other internal device) clock?
Those frequencies are well outside the usual working range of most amps and speakers, so its not surprising they dont work very well.
Clock speed of some kind of internal component perhaps, would be interesting if I had a way to measure it.
https://play.google.com/store/apps/details?id=org.intoorbit.spectrum
Might depend on your phones microphone quality
Your speaker would be vibrating at ⅓ cycle per second at that frequency. You literally cannot hear it. Your speakers will compensate for this by playing an enharmonic series of overtones to trick your ears into “hearing” it. Chances are there’s a low-pass cutoff in your speakers well above that frequency to prevent damage.
hi, most people can hear as low as 20hz most big speakers can produce sounds in the 30-50 hz range. smaller speakers can usually only produce higher frequencies. it's different with headphones, but you can check the specs for your hardware online, mostly from the manufacturer or testing sites.
This sound can be heard from my smartphone speaker, which definitely can't play low sub bass frequencies. and it sounds pretty high as well. maybe 100hz or something? can't say for sure. can't check on my PC right now, might come back to it later.
-edit- try this site for tone generation: https://www.szynalski.com/tone-generator/ it should help understand the sounds of frequencies a little better!
So lower frequency requires a larger speaker because of the larger wave length. 1000Hz is 13.5 inches. 0.33Hz is 3424 inches. I doubt your speaker is that big.
The (unproven) theory behind binaural beats is that one ear hears a slightly different frequency to the other, with the difference being the frequency they claim. As said by another poster, it’s pseudoscience.
That's not the part that's pseudoscience. The pseudocience part is that the illusory beat can train your brainwaves to xyz frequency using binaural beats.
Anyone with stereo earbuds can see that the binaural beating effect is in fact real and easy to document by removing one earbud and hearing a solid unchanging tone until they put the Other back in, so long as two similar tones are played who's destructive interference between one another would in open air create valleys of 0 relative amplitude. Those valleys are the beats.
Im not sure thats it either, theres also monaural and isochronic beats and Im pretty sure there is a common mechanism of entrainment where you become entrained to the current tone and you follow whatever direction the sequence goes or if it remains the same you modulate towards it
Hey OP, you should probably get off of YouTube for a bit and go read the Wikipedia articles for those things.
Isochronic literally means "regularly timed" and "monaural" beats are just destructive interference happening before perception instead of after.
Some concepts you should look into:
https://en.wikipedia.org/wiki/Binaural_unmasking - Like binaural beats this relies on two datastreams, one per ear. This is likely the mechanism which makes binaural beats possible, via misuse of the mechanism.
https://en.wikipedia.org/wiki/Psychoacoustics - The brain is fascinating, and does cool stuff with sound. SOME of those things are simple comparisons, some are extrapolation of data from assumed incomplete sets.
https://openstax.org/books/physics/pages/13-3-wave-interaction-superposition-and-interference - Sound is a pressure wave, and as such will behave like a wave in a fluid medium (air is a fluid, albeit very low density)
https://en.wikipedia.org/wiki/Brainwave_entrainment - The "etymology" section reveals why this is pseudoscience. Remember, pseudoscience just means the scientific method wasn't followed, and therefore it can't be respected as science. This doesn't mean its bullshit, or that its wrong, just that the field is tainted because it was not borne of science but of vibes. Literal vibes in this case.
Anyway that's all I have on the subject for now. I looked into the stuff years ago after experimenting with it for so long and not seeing results.
If you read through all of those articles, especially the one on wave interaction, I think you'll figure out for yourself where they're sourcing those 1hz tones and whatnot (hint, they aren't) , and why you may even be able to percieve them despite being far below the range of hearing.
I mean, I think that misses the bigger picture of entrainment where whether you hear an inbetween thing or not, if you have a sequence of tones moving in a particular direction (either ascending or descending), it can help either stimulate or relax
Idk audacity provably has a button for that.
Traditionally: synthesizers.
I didn't go through all that in the video from the link you posted but I only hear a sine wave at G2, 98 Hz. Not sure if I missed something.
wav_fc = numpy.sin(2 pi fc t)
fc is the frequency of interest, and t is the time series sampled at 1/fs where fs in the sampling rate. So if you wanted a 48khz sampling rate, t would be something like numpy.linspace(0,1,48000)
this post was submitted on 24 Nov 2025
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