Tinnitus Without Hearing Loss. How Is This Possible?

Discussion in 'Support' started by Lisa88, Mar 26, 2014.

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    1. Lisa88

      Lisa88 Member

      Tinnitus Since:
      11/2013
      Had all the tests done which all came back normal. Onset of t from local lidocaine anesthetic 4.5 months ago. Maybe it crossed the blood brain barrier. Can't seem to work it out.
      But if the theory is that t is making up for a frequency lost by hearing. What would the reason be for t without hearing loss? Probably nobody knows, right?!
       
    2. Isabella 123
      Curious

      Isabella 123 Member

      Location:
      Arlington VA
      Tinnitus Since:
      12/2013
      I think if something is putting pressure on your auditory nerve that can cause T, that's why TMJD or tumor can cause it.
       
      • Helpful Helpful x 1
    3. attheedgeofscience
      Uninvolved

      attheedgeofscience Member Hall of Fame

      Location:
      Denmark
      Tinnitus Since:
      Childhood
      Cause of Tinnitus:
      Head Injury
      The key word - when it comes to audiograms - is "normal". An audiogram is concerned with the ability to hear speech. As long as you are within the 0-25db range for 0-8 kHz, your hearing is considered normal. But that does not mean that your inner ear is not damaged in some way. There is no way to really link an audiogram with tinnitus. An audiogram was not invented for that purpose. The person who comes closest to really linking the two is Dr. Wilden. He has several websites; the one below, is the German version:

      http://www.dasgesundeohr.de/tinnitusaudiometrie.htm

      He essentially explains that already with a db-loss of 10 or more, your inner ear function is "challenged". To understand why that is, you have to remember that the energy carried by a sound wave doubles for every 3db. Put another way: a 10db loss means that a sound wave has to be 3 times "stronger" in order for a person to hear that sound with the same intensity as someone who has 0db hearing loss. So a 10db hearing loss may look "innocent" on an audiogram, but in reality it is not. [This is something I have had to explain to many ENTs during the past year - and they all look equally surprised each time; perhaps because I am educating them, or they simply don't get it?]

      I have met dr. Wilden four times. I would describe him as "very passionate" about the topic of hearing loss and laser therapy. Once he "gets going", he cannot stop talking about the subject. Perhaps the most important lesson I have taken away with me from those conversations is that in +90% of all tinnitus cases, the cause is damage to the inner ear. Even if the audiogram looks "normal"...

      I am not surprised that your other tests came back normal. They nearly always do in tinnitus cases.
       
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    4. Lisa88

      Lisa88 Member

      Tinnitus Since:
      11/2013
      Also talking high frequency audiogram and OAE etc.
      What is interesting is that my t is mid frequency, yet my mid frequencies are above average, and even slightly better than shown before I had t.
      As we age, we all lose our higher frequencies, yet not everyone has t.
      My humble theory is that not all t cases are due to hearing loss.
      Another theory also is that the lidocaine (intranasal) crossed the blood brain barrier and changed the brain chemistry in some way around the auditory cortex or elsewhere.
      I know even scientists don't know at this point. But as we delve further into the science, more literature is revealing correlations to different parts of the brain.
       
    5. RoyZ
      Wishful

      RoyZ Member

      Tinnitus Since:
      01/2014
      Cause of Tinnitus:
      Unknown or new bass guitar playing (in med volume)
      There could be many possible reasons.. some of them are:

      1. Hearing Loss, most likely issues in the cochlea.
      2. Hearing nerve issues.
      3. Issues in the auditory cortex in the brain.
       
    6. Brian32

      Brian32 Member

      Tinnitus Since:
      11/2013
      Because it's in the brain and not the ear.
       
    7. Lisa88

      Lisa88 Member

      Tinnitus Since:
      11/2013
      Have since had all the hearing tests done including OAE and high frequency audiogram, passed with flying colors. MRI of the nerve looks normal. Yes, I think it was a chemistry change in the auditory cortex, induced by the lidocaine.
       
    8. Valentin

      Valentin Member

      Location:
      Thailand
      Tinnitus Since:
      17/08/2013
      testing 8 frequencies means testing 0.04% of your hearing capacity.

      so you have hearing loss like we all do, it simply can't be demonstrated by testing 0.04% of your hearing capabilities.

      OAE up to 20khz tests around 0.1% of your hearing capacity.
       
    9. Kimbo Slice
      Balanced

      Kimbo Slice Member

      Location:
      Canada
      What they all said above. My hearing test only went up to 8000khz, and recently I noticed a hissing noise at 12000khz. It's sad because this is how they test kids hearing in schools as well, on top of the fact that they only test hearing there once every 5 years at most. Maybe it's changed since I've been in school. On the other hand, Tinnitus can mean hundreds of different things. You should get your doctor to see if there's anything else wrong with you. Best bet is to do your homework before you go because chances are your doctor will know less then you about this issue.
       
    10. seal

      seal Member Benefactor

      Location:
      Germany
      Tinnitus Since:
      12/2007
      Cause of Tinnitus:
      acoustic trauma
      Where I live hearing isn't even tested at school, we only have one dental check at the age of 7 (2nd grade) and one test for bad sight and that's it..
       
    11. Lisa88

      Lisa88 Member

      Tinnitus Since:
      11/2013
      Yes, as we age, we all lose hearing in the higher frequencies. My t however is a low frequency t. Reviewing the results of both MRI and hearing tests, I really think the changes for me have occurred at the brain, central auditory cortex level.
       
    12. Blacknoise

      Blacknoise Member

      Tinnitus Since:
      01/03/1994
      From what you've said, you seem quite knowledgeable on this topic. Could you answer a hearing loss question for me?
       
    13. Mad maggot
      Breezy

      Mad maggot Member

      Location:
      New zealand
      Tinnitus Since:
      12/2008
      Cause of Tinnitus:
      Unknown
      In most cases T comes from the brain not the ear. I have no hearing loss. In fact my hearing is super!
       
    14. Inge
      Cool

      Inge Member

      Location:
      california
      Tinnitus Since:
      11/2014
      Cause of Tinnitus:
      benzodiazepine withdrawal
      There are many reasons besides hearing loss for developing T. In my case T started after I stopped taking Klonazepam. T is one of the withdrawal symptoms. T can also be induced by stress, and sometimes there is no clear cause at all
       
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    15. Brian Reade
      Cheerful

      Brian Reade Member

      Location:
      Florida USA
      Tinnitus Since:
      07/2015
      Cause of Tinnitus:
      after chiropractic neck adjustment
      I have T inside my right ear only. I can hear out of both ears.
       

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