[Blind-sysadmins] bitlocker accessibility

Hi All, I am emailing on behalf of a friend who works at a company where bitlocker is used for encrypting devices. As you may know it requires the entering of a personal pin to login to the machine, however it is not possible to determine when the login screen is visible on screen. I wanted to ask if anyone knows of a setting to enable any audible beeps or similar to enhance the accessibility of this? Thank you Chamandeep singh Grover