<prompt> Which of the following is the investigation of choice in assessing hearing loss in neonates?Impedance audiometryBAERFree field audiometryBehavioral audiometry  <response>: The Brainstem auditory evoked response BAER test measures responses in brain waves that are stimulated by a clicking sound to check the central auditory Hearing pathways of the brainstem. The test can be done for all ages. Infant test or Bih to 1 year Toddler test or 1 to 3 years Preschooler Test or 3 to 6 years School age test or 6- 12 years Adolescent test 12 to 18 years The test is performed to help diagnose nervous system abnormalities, hearing losses especially in low-bih weight newborns, and to assess neurologic functions. The auditory brain stem values are in a normal range. This range varies among patients and instruments used. In a normal person, 7 waves are produced in the first 100 milliseconds 