Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 I have low frequency loss, and it was explained to me (a while back) that the reason I wouldn't benefit from one of the hybrid implants, is that my loss is in the deep part of the cochlea. My hearing loss follows a different pattern than most... High frequencies are at the outside, middle, then lows are in the inner part. From: Virg <jvtomlin@...> Subject: Re: Re: electrode depth Date: Monday, February 15, 2010, 10:13 PM Â That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 Med -el def goes the entire lenth of the cochlea .It has not been proven that it helps more then other implant manufacturers but to me it makes sense and i do hear high frequencies, low frequencies and middle frequencies. I am not an expert so best to talk to your audiologist. ________________________________ From: Virg <jvtomlin@...> Sent: Mon, February 15, 2010 5:13:06 PM Subject: Re: Re: electrode depth  That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 An audiogram would prove this, have you had one done? Quote of the nanosecond. . . Dogs love their friends and bite their enemies, quite unlike people, who are incapable of pure love and always have to mix love and hate. -- Sigmund Freud & Dreamer Doll ke7nwn E-mail- rclark0276@... Home Page- http://webpages.charter.net/dog_guide/ Re: Re: electrode depth  That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 The short excerpt below from the link below seems to say that the low frequencies are detected at the inner end of the cochlea. Virg http://www.sciencedaily.com/releases/2008/04/080425151819.htm " As a result, the sensory cells near the outer end of the cochlea detect high-pitched sounds, like the notes of a piccolo, while those at the inner end of the spiral detect lower-frequency sounds, like the booming of a bass drum. " Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 I have had 2 audiograms since my implant in Nov . I do not recall the exact levels as i am not at home now and my results are there. My last tests were done in early January and my implant was activated in early Dec. The audiologist was surprised at how well I am doing at all frequencies . My hearing has def improved since Jan. I am due to go back next month for another mapping and hearing test. However, I do not know what this would " prove " ..that I can hear at all frequencies. ? Perhaps a person with another implant can also hear at that level..there may be other factors involved. I believe to " prove "   would require a number of cochlear implant users comparing and contrasting the frequency level of various devices and various electrode depth. Unfortunately I am not aware of any scientific research " proving " this. I can only report what I have experienced and the conclusions I have drawn from personal experience ________________________________ From: <rclark0276@...> Sent: Mon, February 15, 2010 6:25:12 PM Subject: Re: Re: electrode depth  An audiogram would prove this, have you had one done? Quote of the nanosecond. . . Dogs love their friends and bite their enemies, quite unlike people, who are incapable of pure love and always have to mix love and hate. -- Sigmund Freud & Dreamer Doll ke7nwn E-mail- rclark0276charter (DOT) net Home Page- http://webpages. charter.net/ dog_guide/ Re: Re: electrode depth  That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 Oops I reversed it..Thanks Virg.. ________________________________ From: Virg <jvtomlin@...> Sent: Mon, February 15, 2010 7:27:09 PM Subject: Re: Re: electrode depth  The short excerpt below from the link below seems to say that the low frequencies are detected at the inner end of the cochlea. Virg http://www.sciencedaily.com/releases/2008/04/080425151819.htm " As a result, the sensory cells near the outer end of the cochlea detect high-pitched sounds, like the notes of a piccolo, while those at the inner end of the spiral detect lower-frequency sounds, like the booming of a bass drum. " Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 I have heard your last statement as well.. I don't know if this is accurate, but it was my understanding that an advantage to Med El's long array is not so much that it goes deeper, but that the individual electrode pairs are spaced more widely apart than in other implant arrays, so there is not cross-stimulation of adjacent areas. I believe my audiologist mentioned that to me as well but I am not positive of the source. Once again we need user studies across all the implant technologies. ________________________________ From: lidagreg <lydia.gregoret@...> Sent: Mon, February 15, 2010 8:08:40 PM Subject: Re: electrode depth  Right. The cochlea is arranged " tonotopically " with the innermost region (inside the coil) responding to the lowest pitches and the outermost regions (where the " snail's " body would come out) responding to the highest pitches. But if you don't have any sensory cells at all, and you are relying on a cochlear implant to hear everything, I think you will only hear what the CI delivers. If the CI is programmed to deliver only frequencies greater than 125 Hz (or 200 Hz or 250 Hz), you won't hear any pure tones lower, irrespective of the location of the spot that is stimulated on the cochlea by the electrode representing the lowest frequencies. (One could, in theory, map the lowest pitches to a high frequency region of the cochlea, and still hear/perceive them if that region was electrically stimulated. Would it sound low or high, though? Who knows.) I don't know if this is accurate, but it was my understanding that an advantage to Med El's long array is not so much that it goes deeper, but that the individual electrode pairs are spaced more widely apart than in other implant arrays, so there is not cross-stimulation of adjacent areas. Lydia Mom of , age 13, bilateral Nucleus-24 internal CIs and Freedom processors > > The short excerpt below from the link below seems to say that the low > frequencies are detected at the inner end of the cochlea. Virg > > http://www.sciencedaily.com/releases/2008/04/080425151819.htm > > " As a result, the sensory cells near the outer end of the cochlea detect > high-pitched sounds, like the notes of a piccolo, while those at the inner > end of the spiral detect lower-frequency sounds, like the booming of a bass > drum. " > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 An audiogram would only prove to you what your range is now with the implant. No doubt most CI users would see similar results. Also that most if not all would be able to hear down to like 20dB. Quote of the nanosecond. . . Borrow money from pessimists -- they don't expect it back. -- & Dreamer Doll ke7nwn E-mail- rclark0276@... Home Page- http://webpages.charter.net/dog_guide/ Re: Re: electrode depth Ã, That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 15, 2010 Report Share Posted February 15, 2010 Virg, you are correct, the lower frequency cells are at the apex, or deeper in the cochlea. On Mon, Feb 15, 2010 at 5:13 PM, Virg <jvtomlin@...> wrote: > > > That comes as a surprise to me. I'm not contradicting it because I don't > really know but I had been under the impression that the reason for low > frequency loss with an implant (I don't hear much below 200 HZ now) was > that > the electrodes can't reach the lowest frequency hair cells and that they > were the deep ones. > > Virg > > The Med-el Opus 2 has 12 electrodes that extend the entire length deeply > into the cochlea..In natural hearing the deeper the hair cells the higher > pitch the noises that are sensed. > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 16, 2010 Report Share Posted February 16, 2010 FWIW, when I had an audiogram done on my CI ear, I was hearing sounds from 250 Hz to 6000 Hz at 20-25 dB. I was totally deaf to sounds above 1500 Hz prior to surgery, and had severe to profound hearing loss from 250 Hz to 1500 Hz. I have the Cochlear Americas Nucleus Freedom CI system. It is my understanding that a typical audiogram will only test for sounds between 250 Hz and 8000 Hz.  ________________________________ From: Regina Marulli <rmarulli@...> Sent: Mon, February 15, 2010 7:27:41 PM Subject: Re: Re: electrode depth  I have had 2 audiograms since my implant in Nov . I do not recall the exact levels as i am not at home now and my results are there. My last tests were done in early January and my implant was activated in early Dec. The audiologist was surprised at how well I am doing at all frequencies . My hearing has def improved since Jan. I am due to go back next month for another mapping and hearing test. However, I do not know what this would " prove " ..that I can hear at all frequencies. ? Perhaps a person with another implant can also hear at that level..there may be other factors involved. I believe to " prove "   would require a number of cochlear implant users comparing and contrasting the frequency level of various devices and various electrode depth. Unfortunately I am not aware of any scientific research " proving " this. I can only report what I have experienced and the conclusions I have drawn from personal experience ____________ _________ _________ __ From: <rclark0276charter (DOT) net> groups (DOT) com Sent: Mon, February 15, 2010 6:25:12 PM Subject: Re: Re: electrode depth  An audiogram would prove this, have you had one done? Quote of the nanosecond. . . Dogs love their friends and bite their enemies, quite unlike people, who are incapable of pure love and always have to mix love and hate. -- Sigmund Freud & Dreamer Doll ke7nwn E-mail- rclark0276charter (DOT) net Home Page- http://webpages. charter.net/ dog_guide/ Re: Re: electrode depth  That comes as a surprise to me. I'm not contradicting it because I don't really know but I had been under the impression that the reason for low frequency loss with an implant (I don't hear much below 200 HZ now) was that the electrodes can't reach the lowest frequency hair cells and that they were the deep ones. Virg The Med-el Opus 2 has 12 electrodes that extend the entire length deeply into the cochlea..In natural hearing the deeper the hair cells the higher pitch the noises that are sensed. Quote Link to comment Share on other sites More sharing options...
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