[GTALUG] ot: perhaps, headphones?

[Karen Lewellen]

I actually hit upon impedance here because that is  the one number 
generally that does not match the specifications I am using for  this 
particular search.
That being said,  the surgery in question took place in 1992.  It would be 
more than a decade before this incident could even be measured and 
diagnosed, and  almost two or so before  some of the science started to 
provide options, and that is still changing.
Kare



On Fri, 14 Jan 2022, D. Hugh Redelmeier via talk wrote:

> | From: Karen Lewellen via talk <talk at gtalug.org>
>
> | However, this is a fine example of my personal issue...I cannot use them.
> | The impedance on this model is 24, and they make me dizzy.
> | I do have production assistants use them, and in all these years the ear pads
> | remain flawless.
>
> I don't see how impedance could have anything to do with making you
> dizzy.  Could you explain?
>
> I'm not saying those headphones don't make you dizzy.  But it would be
> very interesting to know the mechanism.
>
> If I had to guess at a factor that might cause dizziness, I'd pick
> problems with phase.  That would imply serious filters, I'd think.
> Plain old passive headphones don't have fancy filters.
>
> Perhaps one driver wired backwards: that would make one signal 180
> degrees out of phase.  But that doesn't seem like an easy mistake to
> make.  (It is easy on some home stereo's the swap the lines into a
> speaker.)
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