Fox squirrel (Sciurus niger): The fox squirrel is the largest tree squirrel in Illinois, weighing one and three-quarters to two pounds with a length of 19 Â½ to 22 inches. The fur is a mix of rusty-yellow with black with an overall reddish cast. The fur on the ears, belly, and edge of the tail is lighter.
Audiologists are able to measure the speed and intensity of these pulses to determine if there is hearing loss or a lesion that is upsetting the flow of the sound information through the brainstem. This measurement is called a brainstem auditory evoked response (BAER).
Auditory Brain Stem Response (ABR) Test: This test is used to evaluate the auditory brain stem (the part of the nerve that carries sound from the ear to the brain) and the brainâs response to sound. During this test, miniature earphones are placed in the ear and sounds are played. Band-Aid-like electrodes are placed along the babyâs head to detect the brainâs response to the sounds. If the babyâs brain does not respond consistently to the sounds, there may be a hearing problem.