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) testing: Electrical nerve impulses that carry the sound from the inner ear to the brain are measured. Electrodes are placed in the ear canal and on the head, and short clicking sounds are turned on.ost people with a sensory hearing loss find that hearing aids are beneficial. Neural hearing loss: occurs when there is damage to the hearing nerve or the nervous system. The inner ear generates neural impulses that travel through the hearing nerve to the brain.