hearing test

The purpose of the hearing test is to understand the extent, nature, and location of the hearing loss. It is a subjective value, that is, the number of decibels that you can hear the smallest sound at different frequencies. During the speech test, the examiner pays attention to the consistency of the pronunciation, the vocabulary is easy to understand, the pronunciation is accurate and clear. Be careful not to let the examinee see the examiner's lips. Select the tuning fork of the appropriate frequency for the tuning fork test. Tap the tuning fork in a certain way. The tuning fork is placed in the correct position during the test. The fork of the tuning fork does not touch the fork, and the fork does not touch the hair. Basic Information Specialist Category: Otolaryngology Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: The cockroaches in the ear canal should be cleaned up. Normal value Normal people's hearing range is between 0 and 25 decibels (dB), and normal whispers can be at 6 m distance. Clinical significance Abnormal results whispered hearing distance shortened to 4m, indicating mild deafness, 1m for moderate deafness, and shorter than 1m for severe or complete deafness. Need to check patients with hearing loss in the population. Low results may be diseases: functional paralysis, positional vertigo, tinnitus precautions Contraindications before inspection: The sputum in the ear canal should be cleaned up. Taboo when checking: 1. In a quiet environment. 2. During the speech test, the examiner pays attention to the consistency of the pronunciation, the vocabulary is easy to understand, the pronunciation is accurate and clear. Be careful not to let the examinee see the examiner's lips. 3. Select the tuning fork of the appropriate frequency during the tuning fork test. Tap the tuning fork in a certain way. The tuning fork is placed in the correct position during the test. The fork of the tuning fork does not touch the fork, and the fork does not touch the hair. 4. Prevent hearing fatigue. 5. When the watch is tested, the stopwatch should be on the plane of the external auditory canal. Inspection process According to the different ways of judging the response of the subject, it can be divided into subjective test method and objective test method. The subjective test method is based on the subjective judgment of the subject, and the commonly used methods include: 1 whisper or stopwatch test. Used only for hearing screening, for physical examination. 2 tuning fork test. Simple and easy to diagnose, the nature of deafness can be diagnosed, and the degree of deafness can be roughly understood. 3 audiometer test. There are a variety of audiometers, which are medical electroacoustic instruments that test the listening function in detail. The pure tone is used as a vocal sound signal, which is called pure tone audiometer. The hearing threshold test is performed by air conduction and bone conduction earphones, and the degree and nature of hearing loss of the subject are diagnosed according to the drawn hearing curve. The sensory neural crest can be further diagnosed by threshold function test and self-taught audiometer test. The test method of using speech as a stimulating sound signal is called speech audiometry, which can understand the actual communication ability of deaf patients, and can also provide valuable information for hearing aid selection and central sputum diagnosis. The objective test method is reliable because of the subjective response of the subject, but the instrument and equipment are expensive and the test technology requirements are high. 1 acoustic impedance test: The impedance tester is used to observe the impedance and impedance change of the middle ear to the acoustic energy conduction, so as to judge the middle ear acoustic structure lesion, and to locate the sensory neural crest, functional deafness, and estimation. Auditory sensitivity and location diagnosis of facial nerve injury are of great value. 2 auditory evoked potential test. The auditory evoked potential tester is used to observe the bioelectrical changes of the auditory nerve pathway caused by acoustic stimulation from the distal to the central, so as to understand the state of auditory function. Commonly used tests include cochlear electrogram and auditory brainstem response, which can be under sleep or anesthesia. Performed for subjects from newborns to different ages. Not suitable for the crowd Not suitable for the crowd: no.