Quote:
Originally Posted by Stikk /img/forum/go_quote.gif
Like I said, I'm not questioning your friend or their knowledge in the subject, they studied these things at a high level and all I am doing is guessing but I can say, from my knowledge of materials and how they behave, I don't see how opening and closing your mouth could give you an "average".
The silicone A/B mixture is like a putty kind of consistency and when it's injected into your ear, it starts to set. If your mouth is closed and your ear canal is contracted, where does the energy come from for the silicone to expand when you open your mouth? If it was a liquid and you had your head on the side then atmospheric pressure would provide the energy but it's not a liquid and behaves more like a solid, even in its most "liquid" state. If your ear canal was open and you contracted it, it would contract but I just fail to see where the force is coming from to expand it again.
Anyway, I did open mouth impressions cuz I heard that they give a better fit/seal. I'm sure your audiologist would not have misled you, I just don't see how it is any different to doing closed mouth impressions..
Just my thoughts
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I think it takes a bit for the gel to set up. according to the audiologist.
In my case only open mouth might not have worked for my right easr.
My rt ear canal contracts open mouth and expands closed mouth which is the opposite of most people.
Anyway , a lot of the Livewires people have used that system with good results so I guess I at least have a good chance of a good fit.
Andre said not to worry , they will do a refit if it doesn't work.
It may be in my case I would need to do open for left ear and closed for right ear.
You can test yourself for this by putting your little fingers in each ear and open and close your mouth. See if both sides contract and expand at the same time.
BTW, my kid's ears are like mine, must be genetic.
I think the audiologist said opening and closing gives a better impression of the bend in the ear canal, but don't quote me.
At any rate it seems some people get a good seal with either method and some get a bad seal so luck might have something to do with it