There was a RadioLab special on this a few years ago:
https://www.wnyc.org/story/flashing-light-therapy-alzheimers...
https://www.wnyc.org/story/flashing-light-therapy-alzheimers...
I listened to a whole bunch of these videos, and while I wasn't measuring my memory, I did pay close attention to how the sounds made me feel, and this one particular made me feel strangest: [1]. Unfortunately, the sound fades in and out and the effect goes with it. I wish it could have had stayed at a steady volume so that the effect could be sustained. If you watch it, just ignore the cheesy graphics and listen.
Here are some other interesting ones: [2], [3], [4], [5], [6]
Video [3] is actually supposedly 40 Hz.
[1] - https://www.youtube.com/watch?v=2-eTVW8VMRQ
[2] - https://www.youtube.com/watch?v=xG22hV-gMsY
[3] - https://www.youtube.com/watch?v=ZGHbKWGgH_E
[4] - https://www.youtube.com/watch?v=lhZPMTpW-gg
The ones that are 20hz might make you feel a bit weird because there's not much amateur audio equipment that would do anything other than distort at that low end of the frequency range.
It does say binaural though, so maybe it's panning left/right at 40hz rather than playing a sound-wave at 40hz. If that's the case it's not the same as what the article states: "40 hertz tone".
Here's an online tone generator [1] that will play a sine-wave at 40hz.
There's an absolute shedload of woo-woo stuff on the purported consciousness-enhancing benefits if you google around. That's not to say they definitely don't do funny things to your brain. https://en.wikipedia.org/wiki/Beat_(acoustics)#Binaural_beat...
Exactly.
I actually just went in to Ardour and edited down that one "20 Hz" video I mentioned made me feel weird [1] so that it played the loudest part continuously instead of fading in and out, and then listened to it again and after 5 or 10 minutes of listening to it I felt really weird again, and started to get worried about what it might be doing to me, so I stopped.
It's really interesting, though, and I hope some serious research is conducted on this sort of sound's psychological effects.
Oh god, yes, and it isn't even new. Back around 2005, I ran into a web site selling audio files which they claimed would cure addictions, attract romantic partners, improve luck...
https://www.monroeinstitute.org/
I think they've backed down on some of those claims over the last 30 years, but they'll be happy to take your money for a 5 day onsite retreat.
"the base frequency is 183.58 and the "binaural beat" frequency is 40hz - meaning the difference in the left ear and right ear is 40hz. The left ear plays 183.58 and the right ear plays 223.58hz the difference being 40hz. "
Perhaps the binaural effect does have some benefits, but personally I was struggling to listen to that video for more than 30 seconds or so without feeling both mildly sick and annoyed at the same time! However, I've been listening to the 40 hertz tone from the link I posted above for a good 10 minutes now without any bother. It's quite relaxing after a while actually.
Another tone generator that I've used -- https://mynoise.net/NoiseMachines/isochronicBrainwaveGenerat...
I like binaural beats, some give me an ASMR like effect (ASMR videos made with binaural backgrounds b work well for me too).
So its a high pitched sound played in 40 Hz bursts. Anyone have a generator for something like that? (though 10 kHz can be annoying)