Duplicating a hearing aid curve with a graphic eq?

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JohnRoberts

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In some (many?) states in the USA, you have a state license to sell hearing aids. There is a "Board of Hearing Aids" regulated by the state....kinda like who gets to sell eyeglasses or cut your hair.

Keeps out the competition....

Bri
I cut my hair with a flowbee, and buy reading glasses over the counter.

These state licensing boards are a throw back to the anti-competitive old trade guilds

WWW said:
Guilds of merchants and craft workers were formed in medieval Europe so that their members could benefit from mutual aid, production standards could be maintained and competition was reduced. In addition, by members acting collectively, they could achieve a certain political influence.

JR
 

Tubetec

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They had signs at my local audiologists place looking for staff ,free training given .
Ive read stories about people with some audio and electronics knowledge getting hearing aids , all too often the seller(so called audiologist) didnt have a clue what their taking about , they bandied around a few buzz words to qualify the sale .
If a hearing aid is capable of almost 140db spl theres certainly a potential for further hearing damage in certain situation with loud ambient sounds . I asked a Fraudiologist if hearing damage was possible if exposed to loud sounds amplified by a aid ,of course they re-assured me a hearing aid could do no harm , lies . We know from various electro neurological testing increasing the stimulus beyond a certain point only leads to further dulling of the senses . Another thing I noticed the sellers doing is every once in a while they invite the customer back , re-test and up the volume level in the ear pieces , after a certain point they'll tell you you need to upgrade to a more costly model . In the case of my moms hearing aids , one of the driver transducers became faulty , she handed it in for repair and was told ,no sorry not servicable , you'll need a new pair for 2.5k euros . The original set came with a replacement set of transducers , later I was easily able to fit the part and it worked perfectly again , obviously the seller had no interest in fixing it , he was on a healthy commission for selling a new product . I wonder if the regulatory authorities who deal with medical devices would be interested in the lack of audio knowledge , miss selling, lack of reasonable service and high commissions driving new sales . We'd all cry foul at the old and vulnerable being duped on the doorstep or over the phone by bogus sellers , just because someone sits in a nice office with a sharp suit on and has the sweetest bedside manner doesnt make it any less grievous especially with the large sums of money involved .
 

Dualflip

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I would say that a 3 band tone control for him to tweak will probably be the best solution, if you want someone who is really not an expert in audio to completely mess things up, give him a 31 band EQ. Or you can do whatever everyone else is suggesting, I would suggest you try a 3 band tone control first thou. My 2 cents.
 

JohnRoberts

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I suspect the nature of hearing loss may be relatively narrow band frequency specific. I wouldn't give them a parametric, but IMO octave wide GEQ is not crazy, and 1/3rd oct might allow the patient to better zero in on corrective EQ.

JR
 

cyrano

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The hearing aids I helped test, all were wireless for the software upload. All the audiologist needs to do, is prepare the curve and other settings on a PC and then press "upload". There's also an "overload" setting that prevents them from being too loud and inflicting further damage.

Hearing aids are free here and the price social security is charged for is 800 to 1200 euros, depending on type. Free unless you have plenty of income, in which case you pay around 10% of that.

As the speaker part it fits inside the ear canal, only a small part is visible. That part is needed to remove it. It's attached by a thin wire to a tiny box behind the ear containing the mic, electronics and battery. Nearly invisible. Batteries last about a week.

There are different other models, and I'm sure some details have changed since. What was the newest and the greatest then, was a model that fitted entirely inside the ear canal. Not reimbursed completely by social security. I don't remember the price, but it was several thousands. And battery replacement turned into complete replacement. Of course the power source lasted for years, with wireless charging.
 
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