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Thread: OPN questions for a loyal Oticon buyer

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    I found this to be a helpful primer on earmolds, especially regarding concha locks that I never had and pressure vents.

    http://www.audiologyonline.com/artic...ng-patient-850

    Also, an interesting study on vent hole sizes. In short, an inverse relationship exists between loudness and vent sizes if I interpreted it correctly.

    http://www.hearingreview.com/2006/02...d-performance/

    https://www.slideshare.net/mobile/md...cts-of-venting

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    Quote Originally Posted by gkumar View Post
    I found this to be a helpful primer on earmolds, especially regarding concha locks that I never had and pressure vents.

    http://www.audiologyonline.com/artic...ng-patient-850

    Also, an interesting study on vent hole sizes. In short, an inverse relationship exists between loudness and vent sizes if I interpreted it correctly.

    http://www.hearingreview.com/2006/02...d-performance/

    https://www.slideshare.net/mobile/md...cts-of-venting
    Thanks for sharing these links, gkumar. They're very informative.
    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

  3. #73

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    Quote Originally Posted by gkumar View Post
    Yes that sounds right. I am curious about the vent holes and its effects on occlusion and volume. If I push on my molds in my ear to tighten the seal the volume is louder and I am wondering if the vent holes have an effect on the volume. My ears typically generate much fluids/wax due to my oily skin type.

    In short, Is it worth asking for power molds without vent holes for greater volume or is it worth having those vent holes for occlusion purposes?

    the molds can be easily sealed by putting some acryl in the vent and letting it harden, and that can be drilled open once again, if you don't like it. You can try it out on your mold without damaging it, it is a standard customization that can be done in a couple of minutes. just talk to your audi about it, they should be able to do that right there without having to send the mold to anyone.

    as for the effect of a closed mold. usually the low frequencies are better heard, and the software reduces the mid frequencies if you set it up. I can hear better with closed molds.
    Left/Right//kHz // Oticon OPN1 105dB C-Shell with support

    45/55//0.25
    60/70// 0.5
    70/70//1
    60/70//2
    60/60//3
    50/45//4
    55/50//6
    45/55//8

  4. #74

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    Not sure but I believe each manufacturer has its own ndividual program for custom molds . Your audiogram is sent to the manufacturer and the molds are then built to their specifications. For example the custom molds I have for my Oticons are not to be used for the Beyonds . A new set had to be built by Widex . I was told and I have no reason to not believe them that each manufacturer has their own formula ( mathematics ) associated with each individual hearing aid compilation.
    Oticon Alta Pro (2)

    0250.HZ L-30 R-15
    0500.HZ L-40 R-30
    0750.HZ L-45 R-20
    1000.HZ L-50 R-15
    2000.HZ L-60 R-40
    3000.HZ L-60 R-60
    4000.HZ L-75 R-70
    6000.HZ L-80 R-80
    8000.HZ L-90 R-80

    Speech Reception L-40 R-20
    Presentation Level L-80 R-60
    Discrimination L-60 R-76

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    Quote Originally Posted by blackmamba View Post
    Not sure but I believe each manufacturer has its own ndividual program for custom molds . Your audiogram is sent to the manufacturer and the molds are then built to their specifications. For example the custom molds I have for my Oticons are not to be used for the Beyonds . A new set had to be built by Widex . I was told and I have no reason to not believe them that each manufacturer has their own formula ( mathematics ) associated with each individual hearing aid compilation.
    I don't think that anybody is saying that the molds (or actually the receiver inside the mold) can be used interchangeably between different HA mfgs. The molds are really in the same shape that fill your ear canals anyway, regardless of whether that mold holds an Oticon receiver or a Widex receiver. But the receiver brand and model has to be compatible with the HA brand and model. And the connection between the receiver wiring assembly also has to be compatible with the HA connection, too.

    I'm assuming that the receiver is encased inside the mold and cannot be removed from the mold in the first place.

    I don't think the mfg needs your audiogram to build a mold for you. They just need the silicone impression of your ear canal. The audiogram is only needed for the programming of the HA after the molded receiver assembly comes back from the mfg.

    As for the mathematic formula you're talking about, I assume that it's the fitting rationale you're talking about. Yes, the mfg may use their own, or the audi can also select an industry standard fitting rationale as well if they choose to do so. And the programming does need to know whether you're using a custom mold or 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

  6. #76

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    The receiver can absolutely be removed from the mold . I've seen done right before my eyes .
    Oticon Alta Pro (2)

    0250.HZ L-30 R-15
    0500.HZ L-40 R-30
    0750.HZ L-45 R-20
    1000.HZ L-50 R-15
    2000.HZ L-60 R-40
    3000.HZ L-60 R-60
    4000.HZ L-75 R-70
    6000.HZ L-80 R-80
    8000.HZ L-90 R-80

    Speech Reception L-40 R-20
    Presentation Level L-80 R-60
    Discrimination L-60 R-76

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    My custom molds with the receivers built-in makes it difficult for the receivers to be taken out as it seems to be "soldered" or "acryllic melted" into the mold itself. Perhaps there is a way to remove the receivers, but I am unaware of it or it may be for another brand of custom molds.
    Loyal Oticon HA wearer since the 1980's from FM units and BTEs to RITE and mini-RITE form factors/styles > Currently wearing Alta2 Pro (2015) > Exploring Oticon OPN1 mini-RITE with 105dB custom power mold (2017)

    KHz 0.25...0.5...0.75...1.0...1.5...2.0...3.0...4.0... 6.0...8.0
    Left ...70...80....85.....95.....95....90....85....95.. ..105..105
    Right .85...80....80.....85.....85....80....70....80.... 85...95

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    I'm guessing that perhaps because blackmamba is trialing the OPN and the Widex (if I remember correctly), the custom mold is made differently so that they can remove the receiver from that custom mold to reuse it for other demos as well. But if not a demo item, perhaps they'd rather permanently embed the receiver inside the mold for absolute tightness.

    Or it may also be that different companies make custom molds differently as well.

    I'll be getting my custom mold for my 105dB receivers back next week for my OPNs so I'll let you know whether the receivers are removable from them or not. My impression from what my audi told me is that the receiver won't be removable.
    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

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    Quote Originally Posted by Volusiano View Post
    I'm guessing that perhaps because blackmamba is trialing the OPN and the Widex (if I remember correctly), the custom mold is made differently so that they can remove the receiver from that custom mold to reuse it for other demos as well. But if not a demo item, perhaps they'd rather permanently embed the receiver inside the mold for absolute tightness. Or it may also be that different companies make custom molds differently as well. I'll be getting my custom mold for my 105dB receivers back next week for my OPNs so I'll let you know whether the receivers are removable from them or not. My impression from what my audi told me is that the receiver won't be removable.
    Oticon molds allow for receivers to be replaced. You can remove them to clean the molds. Anything else would seem a puzzlement to me.

  10. Default

    Quote Originally Posted by VinceJ View Post
    Oticon molds allow for receivers to be replaced. You can remove them to clean the molds. Anything else would seem a puzzlement to me.
    everything up to 100dB can be replaced, the 105dB is sealed aroud acryl. wires are soldered around the receiver before being sealed, that lead up to an interchangable wire.
    Left/Right//kHz // Oticon OPN1 105dB C-Shell with support

    45/55//0.25
    60/70// 0.5
    70/70//1
    60/70//2
    60/60//3
    50/45//4
    55/50//6
    45/55//8

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