To one of the humbler comms experiments of the 21st century

This post extends the idea from [ making a global gesture possible ].

What would it be like to feel the hearts of all of humanity beat in real-time? With all the variation, would it even be possible to make sense of it, or would it just be noisy stuff? Well, it doesn’t even have to be the heart, but some way of sensing everyone around that is alive. Would you feel some people dying? Being born? How would it be as an emotional experience? Would people generally feel more empathetic? Perhaps. But could something like this be done anyway?

Using the flash on smartphones to get a PPG could be a start, but what else could we try?

One idea is to start with a carrier signal. Perhaps the amateur radio community could lend a channel. But then this wave has to reach as many people as possible. Doable with repeaters. Then this wave has to pickup individual, anonymous heart rate signatures from everyone. One way is to take the RFID approach. That requires getting some hardware, maybe just a stick-on sensor and resonator, on everyone. Could there be another way that requires nothing more than an electromagnetic interaction? The carrier’s rate of propagation definitely helps with real-time comms, but how to get one health parameter from each individual encoded on top, and then decoded, at the least infrastructural and hardware cost possible?

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Hard Drive Cabling Issues

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Impedance matching on earphones

What happens when one encounters some fancy terms? Well, I try putting them next to other fancy terms! Impedance matching is all over the place in electromagnetics and RF theory, and there’s something clearly missing on our headphones experience…could it be an impedance mismatch?

I’m not even sure what means, but its just about starting with a horrible hypothesis and then refining it along the way. Of course, it helps to have a physiological model to help with forming such hypotheses, but we can enjoy an illusory thought experiment by pitching some words together!

Anyway, what’s wrong about our headphones experience? I can take binaural mics, record audio, and then play it back over headphones. Its not the same. Its not even close. Of course, there is some reality that bleeds through, but its not equivalent to taking the headphones off and just listening to speakers pumping music into a room. Low gain on my binaurals could share some blame. But I think there’s something up with just headphones, at the least the ones I buy off the shelf from Walmart. They can play music, but they are missing (or adding) some processing, which is affecting the actual signal that’s meant to come through and give us a binaural experience. Maybe in-ear binaurals would help…

Making a global gesture possible

What would it be like to feel the hearts of all of humanity beat in real-time? With all the variation, would it even be possible to make sense of it, or would it just be noisy stuff? Well, it doesn’t even have to be the heart, but some way of sensing everyone around that is alive. Would you feel some people dying? Being born? How would it be as an emotional experience? Would people generally feel more empathetic? Perhaps. But could something like this be done anyway?

Using the flash on smartphones to get a PPG could be a start, but what else could we try?