Okay, so this isn't the same as someone seeing a signal problem in their EEG
Right
That's a whole different thing
That's improve your electrodes
That's improve your contacts
Test your electrodes
and that's a whole separate tech support question
This is for that very specific case
Where you've got a client who is...
... electromagnetically sensitive
Okay, so we're dealing with a problem here of magnetic pickup
Electromagnetic fields and so forth
And we've had reason to give people these 48 inch long leads
and that works fine unless we've got problems like electromagnetic fields
and, so you'd like to make them shorter
So, at best, if you have this problem,
you would like to put the amplifier as close to the head as you can
so you can have a short lead
and what do we do with all this intervening lead
the simplest thing is just to start with your wires all braided
this, is sort of braided
and now, we're going to kill the magnetic field coupling
in the following way
we're just going to
let's say
if you've got enough length there to capture the...
Right, okay, so...
I'm going to just use here a coil winder
and do a few turns
and I think with this size coil winder
So what do we have here? This is just sort of a screwdriver cover?
Ah yeah
So could they use something else like a wine cork or something?
A wine cork, but then you have lots of windings
and you'll see why that's a problem in a moment
Now aren't we canceling out different frequencies if you wind smaller or bigger or does it not matter
No No, you cancel them all out
so that's one winding
this is two
this is three
Do we need a certain number?
we need an even number
oh
Was that four or is that... now I ...
Did I mess up your count?
Yes, because I don't double track, Okay
Sorry about that
So now you've got
Should I do taxes in the background and count the numbers
SHHH!
Will that help?
So, Ah ... ... So now we have four windings
Yes
So I'm going to take two of them
and, just twist them the other way
ah, okay
right
Okay
So it goes two this way, and then two that way
Right, so we need an even number
What stops them from just unwinding themselves
Okay, and now, of course, we need to tie it all together
So now I'm going to peel them all off
Oh, it doesn't stay on this pesky thing, you take it off
No, no, no,
And now we're going to take a little tape
Okay
And just ah
well this tape ...
You've got more
We've got more, but I need each one of them
Oh, Okay
Okay, so now we're going just going to tie these things together
okay
so it doesn't come undone
Okay
Now, the question I want to ask is ..
Why is this necessary
What problem are we solving
Why not just proper electrode care,
just, good quality electrodes
and proper common mode rejection
Well, the fundamental problem we're addressing
Is, that these things are antennae,
Now, I put three on here and I have two left so this isn't sticking very well
but you get the idea
yeah
you need a permanent tape
that holds this together
well, you're using gaffers tape which is designed not to be that sticky
So, that's why it's not very sticky
Okay, I just grabbed the nearest available tape, so
Fair enough
So, anyway, this now takes care of you
Because we've got the windings, an equal number of windings going one way,
and the other
the magnetic field coupling cancels between the two
and now you have the right lead length
to go just from the head to the amplifier
if the amplifier is right behind the head
now, that's about as well as we can do
if you still have a problem with EMFs
because your client still feels uncomfotable
or feels the effect
Take that seriously, that person is a receiver for the electromagnetic radiation
So, if the person still feels the sensations
Then, we have to do something with the room
Okay, so we're dealing with people who are really really electrically sensitive
Right
These folks who really, they're in an electrical environment and then they feel that noise
So, we're not talking about common mode rejection on the amplifier side
We're not dealing with cleaning up the amplifier signal
So if we've got noisy signals in the EEG and seeing in Cygnet
We're talking about a whole different solution there of better quality electrodes
Right
and the kinds of tech support questions we deal with everyday of
"hey I've got noise in my signal"
Well, improve your contact, Improve your electrodes -- get better electrodes
Fix all that
We're not dealing with the amplifier side
We're dealing with the client side
We're feeling like there's some
These are antennae,
the client is feeling the noise that's being picked up by these
I mean, what kind of noise are they picking up?
What kind of "EMF" is the wire receiving?
That's first of all, all the radio stations
Or, if you have a police station down the block
their radios would...
So this is a little like a person hearing a radio station in their dentures
Or in their fillings
Exactly, Same thing
Okay
Right, But on top of that we have all of the wi-fi signals now also
So from the whole rest of the building
Alright, well we have our solution
Thank you so much