Every person’s ear canals are different so they have unique acoustic qualities. Learn how real ear measurements (REMs) REM AutoFit will help you to personalise hearing aids to the client's ears. Read more here: otic.one/REM_AutoFit
no it is also correct but less precise , because you get less informations over the CAE.(hearing canal) but if you use the audiometry in situ, its quiet precise. You need to know that if the probes are not well placed by the professional , the measure is false.
because the measure is done with a tool which cost more than 8000€ approximately. so it isn't possible to get it in each shop. you need the oticon genie 2 program and the MedRx tool. I am a professional i so i can tell you the reality on the field.