pure tone audiometry

The pure tone audiometer test is a relatively accurate and commonly used method for determining the nature and extent of deafness in auditory function tests. Testing the hearing threshold intensity of each frequency of the subjects separately can provide a basis for the qualitative, quantitative and local diagnosis of deafness. Includes air conduction and bone conduction tests. The air conduction test starts from 1KHz. After the patient hears the sound, it will drop down every 5dB, until it can't be heard, then increase the sound intensity (5dB per file), and repeat the test until the test. Until the exact hearing threshold. Then, in the same way, the hearing thresholds of other frequencies are sequentially tested. Basic Information Specialist Category: Otolaryngology Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: When using the test, you should pay attention to the use of intermittent sounds to avoid hearing fatigue. Normal value The most important range is between 500 and 2000 Hz, which is called the human speech range. Clinical significance Abnormal results: 1. The conduction curve of the humerus is normal or close to normal, and the hearing loss of the air conduction curve is between 30 and 60 dB. Generally, the low frequency hearing loss is heavier. 2. The hearing curve of sensorineural hearing loss is gradually decreasing or steeply descending, and the high-frequency hearing loss is heavier. The bone conduction curve and the air conduction curve are close to each other or coincide with each other. 3. The mixed patella conduction curve decreases, and the air conduction curve is lower than the bone conduction curve. Need to check the crowd: hearing impaired. Low results may be diseases: functional paralysis, hearing impairment, tinnitus, otosclerosis Taboo before inspection: Wash your ears. Taboo when checking: 1 in a quiet environment. 2 should pay attention to the use of intermittent sounds to avoid hearing fatigue. The bone conduction test operates in the same way as the air conduction test. 3 If the hearing energy threshold of the two ears is more than 40dB, it should be masked with better ear noise when measuring the bad ear, so as to avoid the patient's mistake to hear the sound from the good ear through the skull as a poor ear. sound. If the hearing thresholds of the two ear bones are different, when the bone hearing threshold of the poor ear is checked, the better ear should be masked with noise. Inspection process Includes air conduction and bone conduction tests. The air conduction test starts from 1KHz. After the patient hears the sound, it will drop down every 5dB, until it can't be heard, then increase the sound intensity (5dB per file), and repeat the test until the test. Until the exact hearing threshold. Then, in the same way, the hearing thresholds of other frequencies are sequentially tested. The bone conduction test operates in the same way as the air conduction test. Not suitable for the crowd Not suitable for the crowd: no. Adverse reactions and risks Nothing.