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Ear canal S bend geometry?


I am training to become an audiologist ... the theory is no problem, but the practical side is a bit more difficult!

I am now having to learn how to take ear impressions ... but the geometry of the ear canal is defeating me.

It's supposed to be S shaped ... but how does this S shape oriented? Vertical? Horizontal? Tilted?

And where the heck are the "first bend" and the "second bend"?

Any help most welcome!

[I have searched the Web far and wide - but could not find SPECIFIC details on the ear canal route]



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