Hearing 12,000 Hz falls within the normal frequency range that a person can hear, and the normal human hearing frequency range is 20 to 20,000 Hz. Hearing can be understood and evaluated through the main observation hearing, guest observation hearing and other checks. 1. Main observation hearing: Including voice examination method, tuning fork test, pure tone hearing threshold, phonometry, etc. The main observation hearing will be subjected to the hearing of the affected person. The main observation hearing is affected by the subject’s consciousness, emotion, age, culture and other factors, and there will be some errors for some special groups of people, such as the mentally retarded, infants and young children. 2. Objective Audiometry: In the clinical setting, the general application of electrical response audiometry, otoacoustic emission testing and other methods. The subjective consciousness of the subject has less influence, but the frequency characteristics are relatively poor. Electroreactive audiometry is generally used for infants and young children, and otoacoustic emission testing is generally used to identify organic deafness and neurological deafness. Being able to hear at 12,000 Hz is within the normal hearing threshold range.