Strangely, it made me sleepy in just a couple minutes.
It is an annoying sound, but I also felt quite relaxed, and I had some coffee this morning.
I feel like a nap is needed.
“Strangely, it made me sleepy in just a couple minutes.”
Exactly the same thing happened to me. And actually put me to sleep at an early morning time it is ordinarily very difficult to get back to sleep.
It puts my parakeets to sleep!!! They can not keep their eyes open!
Also, fascinating to watch the “Exact 40 Hz Gamma Brainwave audio used by MIT to prevent Alzheimer’s” on a spectral analyzer, my favorite being Android “Spectroid” with traditional chart and waterfall presentations. And it seems to be one of the most directional sounds I have ever encountered, at least while playing on my phone. If it turn the phone off-axis in the slightest my perception of the sound volume drops considerably (but then I’m almost 70 and 10 khz is getting up there). But I’m sure the birds can hear it fine.