Because my 'input transducer' has significant treble loss, this AGC system is really cranking up the high frequency gain in an effort to compensate. And, in so doing, brings up the noise floor by exactly the same amount, just like an analog gain stage would with a similar change. And this amplified noise floor is what tinnitus sufferers are hearing.
What do you think? Thanks.
I can't contribute to the discussion but can understand cvanc's problem, as I also suffer from tinnitus. It is distracting at times. I find though the distraction is much less when I concentrate on something like study or reading. I also wish for a cure that avoids hearing aids.
Here!
A randomised, double blind trial of N-Acetylcysteine for hearing protection during stapes surgery.
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Has anybody ever tried to determine the actual frequency of a tinnitus sound and maybe beat (heterodyne) against it? Can it be determined with a signal generator. I know that sometimes I will hear a perceptible shift in the frequency. I associate higher frequencies with more exposure of whatever it is. There is always a cause if I look for it.
Has anybody ever tried to determine the actual frequency of a tinnitus sound and maybe beat (heterodyne) against it? Can it be determined with a signal generator. I know that sometimes I will hear a perceptible shift in the frequency. I associate higher frequencies with more exposure of whatever it is. There is always a cause if I look for it.http://www.notchtherapy.com
You cannot "beat" the sound of your tinnitus against a sine wave because it is not a real sound. Beat interference is only applicable to objects that obey the wave equation, and the neuronal impulses that cause tinnitus do not. The only way to find the frequency is to subjectively identify its pitch: if you are completely tone deaf you cannot do this.
Btw, an old friend of my works for a big hearing-aid transducer company. Did you know those things leave their factory for 1-2 bucks, incl profits etc!!!
In the store you pay easily $600-$800 for those bloody things.
Some middle man in between knows how to fills his pockets......
Btw, an old friend of my works for a big hearing-aid transducer company. Did you know those things leave their factory for 1-2 bucks, incl profits etc!!!
In the store you pay easily $600-$800 for those bloody things.
Some middle man in between knows how to fills his pockets......
Hearing aids for $600-800? If you're talking AU/NZ$ more like $1000-3000 per ear!
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Btw, an old friend of my works for a big hearing-aid transducer company. Did you know those things leave their factory for 1-2 bucks, incl profits etc!!!
In the store you pay easily $600-$800 for those bloody things.
Some middle man in between knows how to fills his pockets......
It is always easy to underestimate the costs of "the last mile". As a rule of thumb in non-commodity retail industries, the retailer doubles the cost of the product to them. It will be worse in this industry due to...
I presume there will be significant expenses associated with fabricating custom acrylic/silicone ear inserts, buying audiology equipment, gaining certification, learning about the merits of specific products, dealing with "it doesn't work well" rejections, failures in normal use, home visits for assessment, retail premises, product volumes, ...
Besides, the transducers are the least interesting part of the hearing aid. Making a DSP run on 1V for weeks on a small battery shouldn't be underestimated. Their semiconductor processes are entirely dissimilar to processors/memory/logic etc!
Misophonia, literally "hatred of sound", was proposed in 2000 as a condition in which negative emotions, thoughts, and physical reactions are triggered by specific sounds.
Btw, an old friend of my works for a big hearing-aid transducer company. Did you know those things leave their factory for 1-2 bucks, incl profits etc!!!
In the store you pay easily $600-$800 for those bloody things.
Some middle man in between knows how to fills his pockets......
It is always easy to underestimate the costs of "the last mile". As a rule of thumb in non-commodity retail industries, the retailer doubles the cost of the product to them. It will be worse in this industry due to...
I presume there will be significant expenses associated with fabricating custom acrylic/silicone ear inserts, buying audiology equipment, gaining certification, learning about the merits of specific products, dealing with "it doesn't work well" rejections, failures in normal use, home visits for assessment, retail premises, product volumes, ...
Besides, the transducers are the least interesting part of the hearing aid. Making a DSP run on 1V for weeks on a small battery shouldn't be underestimated. Their semiconductor processes are entirely dissimilar to processors/memory/logic etc!That still doesn't explain a factor 800 or more!
Btw, this where the precies a few years ago, without fancy DSPs. Most of them actually use a very simple passive filter.
But even with DSP these prices are insane.
There is absolutely no technical excuse for it.
(I have been long enough in the audio field to have a good sense for that)