1. Audiometer is an important instrument in otolaryngology clinic.

2. The audiometer that our hospital uses currently is mainly the sufferer's pure sound to listen to read a test, other functions seldom use.

3. Then BAEP and the auditory capability were measured by a cerebral evoked response recorder and an audiometer.

4. Bone conduction thresholds of the patients were detected by OB822 audiometer made in America to record their audiogram.

5. The research study pharyngotympanic tube function of balance pressure by Az - 26 Impedance Audiometer made in Dane.

6. METHODS 68 patients were checked and followed up by audiometer and acoustic brainstem response before and after taking gentamycin.

7. All children underwent routine otoscopic examinations of ear, nose and throat, and were also examined using the Madsen acoustic impedance audiometer.