why subs ultrasonic not infrasonic? (or normal sonic)

[Shannon]

This question came into my mind when I answered in my "ultrasonic calibrating" thread: Why aren't the subs in infrasonic?

Partly because it is much harder to find infrasonic-capable speakers/headphones than ultrasonic capable, and partly because it lowers data transmission rates to the brain when the "carrier signal" is that slow.

Lower hearing frequencies can be turned up very high without getting damaging to the ear and it's still outside the normal hearing range so it passes the conscious mind and enters the subconscious.

Volume is volume. Energy is energy. You can damage your ears with infrasonics just as you can with ultrasonics and audible "sonics"

Or why just not put the sub into the normal hearing range without being masked? I'm pretty sure we couldn't understand it consciously even if it were 10khz because I can hear the ultrasonic and still don't understand a word. I think it is sped up way too high for that.

You could not understand the 5G subliminalized audio if it were audible, but then, guess what? It wouldn't be subliminal! It also would be very annoying to listen to for more than a few seconds. Believe me.

I hear something like a blur with some "dips" it's just too fast. I think I hear multiple frequencies at once and during the "Blur" most overlap and during the "dips" only few overlap. Its as if Shannon is reading to us something at 40x speed in 5 frequencies simultaneously. If that's true it would definitely not be understandable even in hearing range.

5G uses a very complex set of expressives, but there are not multiple distinct simultaneous frequencies.

Is it understandable in hearing range? If yes, how is it producing 160 words per minute, I can't imagine that being understandable.

No, it sounds like bees buzzing when audible. And it's 80 to 120 words per second for 5G.

If not, why not put it in the much safer hearing range where people know when it is too loud and won't accidentally damage their ears or have it too low to work without knowing?

The range of hearing does not determine safety. The volume determines safety. And if you have common sense, and follow the instructions, your hearing will be just fine. Some people develop tinnitus from ultrasonics if they are too loud, but that can be dealt with by lowering the volume or using masked subs. The whole issue is people listen to headphones too loudly even with regular audio, and then ultrasonic audio is hard to discern the volume of. It is easy to set the volume to 0 or too high by accident, and not know it. That's why we recommend using masked format only with headphones and earbuds.

Or why not put it below 20hz? That is a very safe frequency for the ears and it reaches very far as it loses way less energy/volume than high frequencies through distance (e.g. speakers from the other side of the room while sleeping).

It is centered at 17.5 kHz.

But seeing how many words are spoken per second, wouldn't the sub still work without being masked by another sound (ocean surf, Trickling stream) and turned up to the normal volume and frequency?

The programming would still work as an audible file, yes. But you would not want to listen to it. And, it would no longer be literally subliminal in all senses of the word, although as long as the conscious mind was unable to decipher it while the subconscious was, it would still have the same effect.