How to disable “H-T” icon from blackberry10 devices

If you are realtively new to the BB10, and you seems to discover the icon “H-T” (black letters on a white background) appeared to the right of the bluetooth icon in the top left corner of the screen. You have no idea what this icon means or represents, and neither does any of my friends who have a BB10.

Questions:  What does this “H-T” icons means?
Answer: Hearing Aid Mode

Solution!
To Disable this “H-T” icon: Tap Settings > Accessibility > Hearing Aid Settings. Set the Hearing Aid Mode switch to Off.