[UWP][Accessibilty] Is there a way to hide a TextBlock from a screen reader when doing UI Automation (or ARIA)?

I am using AccChecker to verify my UWP (Windows 10 universal) app. I have some TextBlocks that are using the Segoe MDL2 Assets font to display glyphs.  These TextBlocks appear in the UIA Screen reader tab of AccChecker.  Is there any way to prevent UI Automation from finding these TextBlocks?  I have tried setting AutomationProperties.Id and AutomationProperties.Name to empty strings.