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Thread: Worthwhile Trying Costco?

  1. #11

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    I've always wondered about that "Doc".

  2. #12

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    So you're saying that the folks with high powered receiver's and rics that have acrylic modes have poor sealing?

  3. #13

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    "Poor"? No, not necessarily. Worse acoustic seal in comparison to a full earmold made of a soft material? Generally yes. Of course, ears vary, blah, blah individual differences. But your chances of fitting a severe-profound loss without feedback without running the feedback manager and thus limiting the gain go up with an earmold.

  4. #14
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    Quote Originally Posted by Neville View Post
    "Poor"? No, not necessarily. Worse acoustic seal in comparison to a full earmold made of a soft material? Generally yes. Of course, ears vary, blah, blah individual differences. But your chances of fitting a severe-profound loss without feedback without running the feedback manager and thus limiting the gain go up with an earmold.
    Problem here is the OP's loss is basically in the Moderately severe to severe range, so he really doesn't really need a soft mold unless he has an allergy to other mold materials. No matter what material is used, if the impression and mold are made correctly the acoustic seal will be okay.
    Last edited by seb; 05-16-2017 at 10:54 AM.
    Oticon Agil Pro w/streamer

    -250 500 1000 1500 2000 3000 4000 6000 8000
    L 10--5----10----30---50----70----85---80---80
    R 5--10----20----35---45----85----85--100--100

    SP Disc ------------- SRT
    L 88% @55db ------- L-10
    R 90% @55db------- R-25

  5. #15

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    Most SP or UP ric receivers require a hard mold fitted at the factory.

  6. Default

    Quote Originally Posted by seb View Post
    Problem here is the OP's loss is basically in the Moderately severe to severe range, so he really doesn't really need a soft mold unless he has an allergy to other mold materials. No matter what material is used, if the impression and mold are made correctly the acoustic seal will be okay.
    The way I understand what Neville is saying is that hard molds may be a little less forgiving than soft molds because if your ear canals vary from time to time (for example they may swell up or contract during the course of the day maybe from your sleep/wake cycle), the soft molds can be compressed or expand a little bit to always provide a snug fit to your ear canals as the canals may vary in size. But if you use a hard mold and it was made while your ear canal was a little more expanded for some reason, then when your canal opens up a little, then the hard mold won't expand up like the soft mold to continue to provide a snug fit anymore.

    So even if the impression and hard mold are made correctly, if they're made at the time when the ear canal expands,then the hard mold may not be snug enough. If the other way around (when the ear canal opens up more), then the hard mold may be made too snug. For folks whose ear canals don't change much then this may not be a big issue, but I think there are folks whose ear canals may change on a daily basis based on their sleep/wake cycle or other factors. Or maybe just changing in size gradually over time.
    HA wearer since the 1990's > Rexton Insite+ CIC (2011-2016) > Oticon OPN RITE (2016)

    KHz 0.25...0.5...0.75...1.0...1.5...2.0...3.0...4.0... 6.0...8.0

    Left ...10...10....10.....30.....70....75....80....95.. ..90....80
    Right .25...30....40.....55.....75....85....90....90...1 00...100

  7. #17

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    Regardless, why would he switch from BTEs to RICs if he switched in the past and didn't like RICs? Just get the same technology in a BTE style.

  8. Default

    Quote Originally Posted by Neville View Post
    Regardless, why would he switch from BTEs to RICs if he switched in the past and didn't like RICs? Just get the same technology in a BTE style.
    The only thing I can think of is for aesthetic reasons if the tube is more visible than the wire, and the BTE is probably usually bigger than the RIC HA. But if he doesn't care about this then I agree, don't see why not.
    HA wearer since the 1990's > Rexton Insite+ CIC (2011-2016) > Oticon OPN RITE (2016)

    KHz 0.25...0.5...0.75...1.0...1.5...2.0...3.0...4.0... 6.0...8.0

    Left ...10...10....10.....30.....70....75....80....95.. ..90....80
    Right .25...30....40.....55.....75....85....90....90...1 00...100

  9. #19
    Join Date
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    Quote Originally Posted by Volusiano View Post
    The way I understand what Neville is saying is that hard molds may be a little less forgiving than soft molds because if your ear canals vary from time to time (for example they may swell up or contract during the course of the day maybe from your sleep/wake cycle), the soft molds can be compressed or expand a little bit to always provide a snug fit to your ear canals as the canals may vary in size. But if you use a hard mold and it was made while your ear canal was a little more expanded for some reason, then when your canal opens up a little, then the hard mold won't expand up like the soft mold to continue to provide a snug fit anymore.

    So even if the impression and hard mold are made correctly, if they're made at the time when the ear canal expands,then the hard mold may not be snug enough. If the other way around (when the ear canal opens up more), then the hard mold may be made too snug. For folks whose ear canals don't change much then this may not be a big issue, but I think there are folks whose ear canals may change on a daily basis based on their sleep/wake cycle or other factors. Or maybe just changing in size gradually over time.
    Studies have shown that the acoustic seal of various types of molds and mold materials make very little difference in patient satisfaction. Exceptions are excessive jaw movement or someone who is active in sports who may get hit in the ear, in this case vinyl or silicone molds would be the one to go with. Acrylic molds do not shrink, change shape or get hard with time. It also is the easiest to reshape and re tube and is also the easiest to insert in the ear. The ear does not really change size or shape unless you gain or lose 5 lbs or more or you have excessive jaw movement when you chew. If the mold is made correctly you should be good to go for a number of years with a hard mold. As we age the ear canal tissues can thin and lead to problems with hard molds. One thing to remember is an earmold should never hurt, if it does something is wrong.
    Last edited by seb; 05-17-2017 at 12:15 PM.
    Oticon Agil Pro w/streamer

    -250 500 1000 1500 2000 3000 4000 6000 8000
    L 10--5----10----30---50----70----85---80---80
    R 5--10----20----35---45----85----85--100--100

    SP Disc ------------- SRT
    L 88% @55db ------- L-10
    R 90% @55db------- R-25

  10. #20
    Join Date
    Dec 2009
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    Wales, UK
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    3,457

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    Quote Originally Posted by seb View Post
    Studies have shown that the acoustic seal of various types of molds and mold materials make very little difference in patient satisfaction. Exceptions are excessive jaw movement or someone who is active in sports who may get hit in the ear, in this case vinyl or silicone molds would be the one to go with. Acrylic molds do not shrink, change shape or get hard with time. It also is the easiest to reshape and re tube and is also the easiest to insert in the ear. The ear does not really change size or shape unless you gain or lose 5 lbs or more or you have excessive jaw movement when you chew. If the mold is made correctly you should be good to go for a number of years with a hard mold. As we age the ear canal tissues can thin and lead to problems with hard molds. One thing to remember is an earmold should never hurt, if it does something is wrong.
    Yeah? Really?

    Can I see the sources for those.

    Silicone moulds are used to achieve better acoustic seal than harder materials, not especially for active individuals.

    There's at least five different modulus acrylics on the market. From fully hard to one that's about 35 shore iirc.

    The insertion argument is bogus, especially when you see the number of people who fails get acrylic moulds fitted under their anti-helix.

    You might want to think about your level of confirmation bias when posting this kind of info.
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