Patient: The child was examined at 2 months of age, and the auditory evoked potential (AE): the right v-wave latency of the brainstem AE baep is significantly longer than the left. What does it mean? The test report is on the attached file. The child is now more than three months old, and he is responding to teasing with a bell, but it seems that he is not responding positively, he wants to laugh and grab things, he seems to be active, do we still need to recheck his hearing? Thank you very much for your advice. Yin Shankai, Department of Otolaryngology, Shanghai Sixth People’s Hospital: The auditory evoked potential report may vary depending on the equipment or the proficiency of the staff. It is not possible to make a specific diagnosis based on the report alone, and other specialized tests and auxiliary examinations are needed to evaluate the child’s condition. Optionally, 40 Hz brainstem threshold and otoacoustic emissions may be repeated in three months. Follow up with a specialist at a regular local hospital.