This is an important Verification Test is performed after you are Fitted with newly Calibrated Hearing Instruments to Verify your Hearing Correction and make Fine Tuning adjustments. Should be performed at least 2-3 times after new Fitting of Instruments with in 6 weeks. Additionally should be measured every year after that to keep track of changes in your Hearing Prescription. If you have never had this type of test you are likely not Hearing your best nor can anyone prove otherwise without it... (This service includes a Graphed Comparison to show before and after results on paper, 110.value..)