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Magnets To Replace Bluetooth?
aceat64 writes "News.com is carrying a story that suggests magnets could eventually replace Bluetooth as a cheaper and more energy effiect wireless solution. The concept of magnetic induction isn't new, but Aura has managed to shrink the technology onto a single chip. The first device to be made using the technology is a wireless headset that will cost between $60 and $80."
Correct me if i'm wrong but dont most Radio transmission technologies use some form of magnetic induction in order to achieve their goal. Last i heard passing electricity through a coil produces a magnetic field. Whats new here?
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Docker uses a single AA primary cell battery to get up to 1500 minutes - 25 hours! - of talk time and 3 months of standby. What's more, Docker has no on-off or stand-by button, so you never need to remember to turn it off.
it'll automatically turn off when the battery runs out though, so you'll have to remember to change the battery.
OK I RTFAd and unless there has been a change in the fundamental laws of physics and the properties of electrical and magnetic fields then this whole thing is just BS.
You can NOT get a varying magnetic field without also getting a varying electrical field. That is the way the physical universe works. If you can not vary the magnetic field... how are you going to send a signal from the transmitter to the receiver?
-DU-...etc...
"Don't sweat the technique."
Actually, I have to wear a hearing aid in one ear due to mid-ear damage, and I'm expecting before long to have an inductive loop for my cell phone that means handsfree use without any kind of additional earpiece. Apart from convincing people that I'm completely mad and talking to myself in the street, it should be a considerable improvement over bluetooth headsets, which, compared to either of my hearing aids, are heavy and have poor frequency response.
Panurge has posted for the last time. Thanks for the positive moderations.
Not only can magnets give you lighter wireless communication, but also eternal life!
An alternating current creates and EM field. The strength of the the two portions of the field related to the strength of the current, the configuration of the 'antennae' and the distance from the 'antennae'
To create a strong magnetic field, it seems one would have loops. The loops would create a strong magnetic field based on number, radius, and current. A electric field would also be created based on the same, but perhaps less so on the radius. So, if we drive the magnetic field, it seems we would also be making similar changes to the electric field.
Therefore, even if they were creating a magnetic field sufficiently weak, which would occur with small loops, so that the natural decay rate made it barely perceptible at a meter or so, it seem that there would still be a detectable electric field.
This might not be a problem if they were varying the radius of the coil using, perhaps, a piezoelectric device, and receiving with a similar piezoelectric device.
I am sure someone will correct me if I am wrong.
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Now, I'm no physicist, but I was under the impression that all radio waves were based on electromagnetic induction. So this article doesn't really make sense at all.
Now, I know there are some devices that use magnetic induction to 'charge' and then blast out information, like RFID. But the key here is the RF -- radio frequency (ID = identification, of course).
So it would make some sense if these guys said they wanted to carry power using Magnetic induction, rather then using power cables or batteries, but it doesn't make sense for them to say they want to replace 'blue tooth' with it, because blue tooth and all radios use Magnetic induction to communicate...
My guess, yet another reporter with absolutely no idea wft they're talking about.
autopr0n is like, down and stuff.