it does sound like fun

Thank you! Cheers!

I did and I agree it was awesome

we did one you know?

indeed mate

Glad you enjoyed it mate

awesome mate - I am glad it helped

very nice ideas mate

yep - exactly

Do you have any idea where I could get a hold of such devices, please ? Or even just find out more about them ? (Sounds like a potential DIY project.)

@@kennethbain4290 where to buy them if you are not the US Navy? I have no idea, sorry. But as far as I know, Sound Powered Phones is the proper terminology, so maybe you can run a search for that. Might get lucky and the manufacturer pops up in the results or something.

that is very interesting mate - thanks for the heads up - it would make a good project

@@ThinkingandTinkering Cheers. The way you frequently drop hints of something bigger, I had assumed, perhaps wrongly assumed, that you already knew about these self powered phones and used this video as a way to introduce the concept in a low tech variation. They are very useful and the professionally manufactured versions are ridiculously reliable so long as the connecting wire is well protected.

@@craigslitzer4857 Thanks. Very much on my To Do list now.

Heavy metal drummer : overload

lol - me too! - you could create a light show with how hard you hit the drum

wow - thanks mate and thanks for taking the time to say that

@@ThinkingandTinkering happy to be part of the community chap :) all learning from each other.

wow - no - thank you mate - bless your heart and thanks for the support

my brother in law is Scottish - I must have a word lol

go for it mate!

nice

lol - indeed

I would probably go for wind walls mate - a much simpler solution really - well I think so

hiya mate and all the best to you and yours too - cheers

lol

I think you are spot on there mate - I will try and get hold of one

no - I'll best you weren't - lol - laughing with you mate - of course

this is linear motion mate not rotary

@@ThinkingandTinkering Potate, potato. Please dont keep your subscribers stupid. Seems like someone understood what i ment. Im from finland and english is not my main language. And there is not enough time / space to explain everything in this small comment section.

Thank you! Cheers!

that would be ideal

Yep, that was my immediate thought. A large wheel with lots knobs on it that can depress the cone as a knob passes. I think it might quickly deform the cone though so it would have to be fortified. If anyone is wondering why you would go to that effort when you could use a coil and multiple N/S magnets (as we've already seen) my answer to that would be that it only requires one coil and one magnet, the rest is wood age tech :) The lack of power this would generate disincentivises me from actually trying this though ;)

very cool lol

The efficiency of amplifiers are pretty decent, 80%+ for a class D is common iirc, the speaker itself however is less than 1% efficient at turning electricity into sound

Thank you! Cheers!

I saw a thing on Mythbusters where they used a big wire across their warehouse as an "antenna", and the radio waves that it received had a bit of current. I'd love to see a slightly more in-depth video on it too.

yes mate - I have done a couple bit it was ages ago - I can certainly revisit this

Phase conjugate holographic imaging can be used for a number of applications from automatic target tracking, to high resolution holographic microscopy. But I have read of a few scientists who have succeeded in using optical and acoustic phase conjugation in a non-linear medium to either transmit energy to a distant location without losses or to absorb it through non-linear resonant circuits without generating heat losses. Normal antenna just heat up if you send 180 degree out of phase waves to a radio source, but a non-linear circuit or a non-linear medium can actually store the constructive interference without heat losses. Plasma can have very high speeds of sound relative to air and is also electro-optically non-linear, so if you excite plasma in a tube, from both ends, with the same frequency so as to form standing waves in the plasma, it forms a Bragg diffraction grating which can support 4-wave mixing of acoustic and/or optical waves of broad spectrum, depending on the parameters of the plasma grating. This normally takes a bit of power to get started, but if your circuit has low losses due to a very high Q-factor something peculiar is reported. The circuit driving the plasma begins to "gate" incoming waves of light and sound into the standing wave by automatically satisfying the incoming waves conjugate phase angle, this is known as 4-wave mixing and makes the plasma a "phase conjugate mirror". This is a kind of automatically tuned resonance that causes incoming waves to constructively interfere in the plasma grating, depositing energy in the plasma to cause self-excitation of the circuit. The higher reflectivity the holographic grating becomes, the more the Q-factor rises, the more energy can be extracted from the environment to reinforce the standing wave, which increase the reflectivity/Q-factor etc. The energy of the room entering the plasma constructively interferes to record the holographic image of the environment in the holographic grating, and the grating then emits a wave that is phase conjugate (aka time-reversed) with incoming waves, it forms a time-reversed holographic projection of the environment which destructively interferes with the light, heat and noise fluctuations in it, suppressing them as in noise-cancellation. The end result is the holographic medium gains energy and the room cools down, because it "sees" the holographic medium as an extremely high entropy path, by being an extremely high Q-factor resonant cavity, like a hall of mirrors, it forms a deep sink for energy. There are a whole bunch of other uses for this effect that could revolutionize the world. It could enhance medical imaging, laser cooling and more advanced force field manipulation like the optical tweezer effect.

I like that - that is very clever thinking mate - cheers

cheers mate

I am sorry mate - I don't understand this

@@ThinkingandTinkering ohms law sir better by far than the act of shame still on UK statue that side stepped the law in creation, last debate in 1940's the act of electrification of Britain 🇬🇧 the wasted our today's n tomorrow, the catch is not being displayed out of existence ,the underside BEST with plus

I guess so - the nasa Stirling is a thermoacoustic. generator

@@ThinkingandTinkering well it looks like you got the acoustic bit lol

yes it does - nice!

I have been working on it - in fact some of what I am doing here relates