The clinical term for the onset of binaural symmetry and progressive neurological deafness in the elderly is senile deafness. According to audiological studies, hearing loss begins to occur after about 45 years of age in men and a little later in women. As human life expectancy increases and the aging population increases, the incidence of deafness in the elderly also increases. Clinical characteristics of senile deafness 1. Most senile deafness is bilateral sensorineural deafness, and the degree of bilateral deafness is basically the same, with slow progressive aggravation. The hearing loss is mainly high frequency hearing loss. The elderly are first insensitive to high frequency sounds such as doorbell, telephone ringing, bird chirping, etc., and gradually become less sensitive to all sounds. 3, some elderly people are manifested as speech resolution is reduced, the main symptom is that although you can hear the sound, but the distinction is very difficult (only hear the sound, not understand the meaning), the ability to understand the decline, this symptom began to appear only in a special environment, such as public occasions, there are many people talking at the same time, but the symptoms gradually aggravated caused by the difficulty of talking with others, the elderly gradually reluctant to speak the phenomenon of loneliness. 4.Some elderly people may have the phenomenon of reverberation, that is, they cannot hear when they speak quietly, but they are too noisy when they speak loudly, their ability to judge the sound source is reduced, and sometimes they compensate with visuals, such as looking at each other’s face and lips when they talk to others. 5. Most elderly people have a certain degree of tinnitus, which is mostly high pitched and appears only in the dead of night at first, but will gradually increase and last all day long. There are many factors leading to senile deafness, which can be roughly divided into two categories: one is intrinsic factors, including genetic factors and systemic factors (emotional stress, certain chronic diseases, such as hypertension, hyperlipidemia, coronary heart disease, diabetes, liver and kidney insufficiency, etc.); the other is extrinsic factors, such as environmental noise, high-fat diet, smoking and alcohol abuse, exposure to ototoxic drugs or chemical reagents, infections, etc., which can trigger or aggravate the development of age-related deafness. The purpose of an audiological examination is to understand the extent and nature of hearing loss and the location of the lesion. There are many different methods of audiological examination, one of which is to observe the patient’s subjective response, called subjective audiometry, such as whisper test, stopwatch test, tuning fork test, audiometer test, etc. However, this method can often affect the correct audiometric conclusion due to various factors such as young age and mental and psychological state disorders. The other type is that the patient does not need to make a subjective judgment response to the acoustic stimulus, can objectively determine the hearing function, called the objectively observed hearing method, its results are more accurate and reliable, there are the following: 1, through the observation of the unconditioned reflexes caused by acoustic stimulation to understand hearing (such as transient eyes, head turning, physical activity, etc.). 2.Check hearing by establishing conditioned reflex or habitual response (such as skin resistance audiometry, western mirror audiometry, etc.). 3.Checking hearing by biophysical methods (such as acoustic impedance-conductance audiometry). 4.Check hearing by using neurobiological methods (e.g. cochlea electrogram, auditory brainstem response).