Using sound to process radio. Not the usual other way round...

serpretetsky

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I did not understand this. They are getting rid of traditional radio antennas/systems and somehow using acoustic properties to transmit / receive?
 

Axman

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They are getting rid of traditional radio antennas/systems and somehow using acoustic properties to transmit / receive?

Sounds like they are using an acoustic amplifier in place of an electronic amplifier to boost radio reception because it promises to be more energy efficient. No pun intended.
 

Nobu

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Sounds like they are using an acoustic amplifier in place of an electronic amplifier to boost radio reception because it promises to be more energy efficient. No pun intended.
So...horn antennas are back in style?
 

Axman

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Is it referring to these sorts of devices?

It sounds like there's some commonality but I don't think so. It seems more like a sensor that vibrates with more force when it's electrified. Piezos convert mechanical input into electrical output (and vice-versa among other things) but it's been a long time since I studied that stuff.
 

Nenu

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They are at the simplest level replacing radio waves with very high frequency sound waves.
You are not meant to hear the sound waves, the freqs are way beyond our hearing. They will be received like a radio wave and converted to whatever was intended. It could be audio, data or signalling.
I have no idea how far these high freqs can travel, bounce off walls etc and what they can pass through.
I'm not clear how viable this method is over distance, I would suppose the speed of transmission will be a lot slower (being through air), so unless it isnt time critical will be a short distance solution.
 

Nenu

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So like bluetooth, but without the EMI considerations? Wonder how my dog will like it.
Yeah similar but hopefully without the bad rep ;)
It will be way beyond a dogs hearing, MHz I think I read.

To be clear though, I dont know how well this will work over distance.
My feeling is not well due to dispersion but with repeaters, who knows.
If this method becomes a norm and it bounces off hard surfaces well, the freqs used could become congested easily.
ie no benefit over radio, probably worse.
 
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Axman

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You are not meant to hear the sound waves, the freqs are way beyond our hearing. They will be received like a radio wave and converted to whatever was intended. It could be audio, data or signalling.

From what I understand it's not for signaling; it's not for sending data, anyway. They're converting radio emissions to high-frequency audio, amplifying it, then using the amplified audio to produce stronger reception.

If it works, it's just a more efficient way to receive and boost radio transmissions.
 

KD5ZXG

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Not saying Sandia used parametrons for latching superregenrative amplification.
More likely a non-latching travelling parametric amplification that also mixes as it
goes down the line. Maybe this technique that worked for Stanford?

http://web.stanford.edu/group/khuri-yakub/publications/00_Raskin_01.pdf

Here's another arcticle that might reveal clues.

https://hackaday.com/2019/04/26/parametric-amplifiers-and-varactors/

Same or simliar to optical amplification while travelling a non-linear fiber?

I don't have details on exactly what tricks Sandia did or did not use.
How much electromechanical, how much pure acoustic?
 
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