During the hearing examination, patients and doctors need to cooperate closely. Only by fully understanding the doctor's requirements can we measure the accurate listening level. Do a listening test in a quiet room. This frequency is tested three times in a row, and the results are the same twice. Objective hearing examination needs to find out the hearing curve accurately and objectively in a quiet sleep state. Objective examination includes acoustic impedance otoacoustic emission, brain stem and auditory evoked potential. I hope I can help you!