Generally, low-pitched tinnitus is mostly a disease of the sound transmission system, while high-pitched tinnitus usually occurs in the process of getting lost, auditory nerve and central lesion. The objective measurement of tinnitus is to detect the acoustic characteristics of tinnitus from the aspects of tone, loudness and timbre.
Objective Tinnitus can be examined by hearing aid or stethoscope. For example, patients suspected of palatal myoclonia can use electromyography to put electrodes into muscles and record the relationship between potential changes and tinnitus during muscle activity.
Patients with tinnitus generally need to check their ears first, because tinnitus can be treated in otorhinolaryngology or neurology. Because if it is caused by otoshadow, most of it is handled by otology; However, if tinnitus is caused by neurological or cerebrovascular problems, it is often handled by neurology. Both departments have some corresponding tests to do:
First, the otology examination, the otology examination generally needs to do the examination of the external ear first, that is, the pediatrician takes a mirror to see if there is any damage to the external auditory canal, and there is no problem with the tympanic membrane and the middle ear;
Second, we should do some listening tests, such as electrical audiometry, evoked potential and other induction and conduction tests;
Third, if there is no definite problem with the ear, consider whether it is the auditory nerve or the intracranial problem.
The next step is to do some examination of auditory nerve, intracranial CT or magnetic resonance, and exclude factors such as cerebrovascular disease or intracranial tumor.
This is a routine examination for patients with tinnitus or deafness.