The normal value of air and bone conduction is between (-10)-10dB, if it is lower than 25dB, to consider that there is a mild hearing loss, which is also known as deafness in clinical practice. It depends on whether there is a consistent decrease in bone conduction and air conduction. If there is a consistent decrease in bone conduction and air conduction, it is considered to be neurological hearing loss; if there is a difference between bone conduction and air conduction, it is considered to be caused by inflammation or otosclerosis. If the difference is between 10-40dB, most of them are considered to be caused by inflammation, and if it is greater than 40dB, it is considered to be caused by otosclerosis. In addition to audiometry, acoustic impedance testing is needed to determine whether the hearing loss is caused by inflammation. For example, whether there is negative pressure in the middle ear cavity, whether the stapedius muscle reflex exists, and so on. In addition, audiometry is a subjective hearing test, and if you want to check the objective hearing test, you also need to do a brainstem evoked potential test.