XPost: comp.misc   
   From: trevor@home.net   
      
   On 22/04/2017 2:54 AM, Johnny B Good wrote:   
   > On Fri, 21 Apr 2017 08:00:07 +1200, geoff wrote:   
   >   
   >> On 20/04/2017 9:34 PM, Trevor wrote:   
   >>   
   >>   
   >>> Actually they are just an amplifier, active equaliser and compressor   
   >>> with various stored custom settings like the ones you mention.   
   >>> What really pisses me off is that it is so simple now to have Bluetooth   
   >>> control from your mobile phone over all parameters of a hearing aid.   
   >>> Sadly there are no aids available that do that simply because the   
   >>> Audiologists want to keep their huge profits from fitting and adjusting   
   >>> the aids. And some of the ones that do have control over volume and   
   >>> mode settings via Bluetooth only work with iPhones because they are too   
   >>> slack to write the apps for Android.   
   >>>   
   >>>   
   >> Or maybe they don't want every know-all Tom Dick and Harry further   
   >> damaging their hearing by inept use and settings ?   
   >>   
   >   
   >  +1   
   >   
   >  It might interest you to know that the classic 20KHz "Upper Frequency   
   > Limit of Human Hearing" is derived from the point on the Fletcher Munsen   
   > response curves where this upper frequency corresponds to both the   
   > highest detectable single tone frequency and the the threshold of pain   
   > (aka dangerously high SPL).   
   >   
   >  As we age beyond our early twenties, this upper limit where we can sense   
   > a single tone frequency at the maximum safe SPL threshold drops in   
   > frequency.   
      
   And you really think this is not common knowledge? You could have added   
   it is worse for males than females if you just want to state the  obvious.   
      
      
   > Continuous exposure to high SPLs accelerates this reduction in   
   > the maximum frequency limit of hearing in each individual's case. It's   
   > quite important to tailor a hearing aid's frequency response and gain so   
   > as to avoid needlessly doing more harm than good.   
      
   What a load of crap, most hearing aids don't go past 8kHz. The damage is   
   already done by loud rock bands and perhaps using MP3 players at   
   excessive levels. Still I agree for people like yourself who are   
   apparently unable to do the job properly, better leave it to a   
   professional. I guess you have an audiologist adjust you HiFi volume and   
   TV volume control as well! :-)   
      
   FWIW, there IS one company who provides self programmable aids and the   
   software to do it, Blamey-Saunders. I bet their customers are told what   
   not to do as I would expect. And I bet they like having control   
   themselves. People who don't have far more alternative choices though. :-(   
      
   Trevor.   
      
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