DIYers should not use Noah (currently Noah4 or Noah-ES)

[pvc]

Below Clip from a DIY School Hearing Aids PDF file (02 How to Program your Hearing Aids);

Don’t use the Noah system software (currently Noah4 or Noah-ES). Noah system software is never required for any manufacturer’s fitting software. Professional Audiologists need the Noah system software to group many clients into a one Noah database and provide automatic startup interfaces for the different manufacturer’s fitting software. If you are a self-programmer, it is simpler and cheaper to run the manufacturer’s fitting software standalone. When fitting software is run standalone it will use its own database.

The hearing aid settings residing in your hearing aids have already been Rx'd/Prescribed to fit your hearing loss, and optionally/(optionally because not every Audiologist uses REM) also have REM/Real Ear Measurement adjustments. Just save those settings without making any changes as a first step before you go tinkering around. There is nothing else of any importance that you need from your audiologist's database.

The Audiogram? Get a paper copy of your Audiogram from your audiologist. Some manufacturer's fitting software retain a simulated partial copy of the Audiogram/(partial because your paper audiogram contains more information than air conduction, bone conduction, and UCL measurements). Tip: After your hearing aid settings (residing in your hearing aids) have already been Rx'd/Prescribed to fit your hearing loss, then the Audiogram measurements (which were used as the initial expression of your hearing loss) are no longer used!

As to doing your own REM/Real Ear Measurement? Fuhgeddaboudit! Astronomically expensive!
For starters, think about how you will do Probe Ear Placement, see this → Link.

 

[pvc]

btw> For some hearing aid fitting software; your Audiogram is already there in your local/standalone database! Though, the fitting software is no longer using the Audiogram because the settings have already been Rx'd/Prescribed/Calculated. How do I know the audiogram is from my local/standalone database. Because at this time, I am staring at my unplugged Noahlink Wireless hearing aid programming device. The hearing aids are not connected.


Qualification: That is, no longer using any input/Audiogram, unless you make some changes that are significant enough to cause a Recalculation, (or in this Oticon Genie 2 case) you have the ability to force a Recalculation;

 

[pvc]

What happens to your REM/Real Ear Measurement adjustments if you (accidentally or intentionally) Recalculate? They're gone Bro.

That's why you need to save your original professional settings as the very first fitting session in your Client database without making any changes.

Sessions are never overwritten, so your "Original Professional Settings" will always be there in the first fitting session of your Client database in case you need to revert back to these settings. Tip: sometimes you must click (Expansion Arrows ">") to see more/all sessions.