hearing fatigue
Introduction
Introduction When you walk into a strong noise environment, you will feel uncomfortable. After stopping for a while, you will feel the hearing become dull. The slightest sound you can hear will not be heard. This is because your hearing threshold moves up, resulting in Your hearing has dropped. However, as long as you leave the noise environment and rest for a period of time, the human hearing will gradually return to its original state. This phenomenon is called temporary hearing deviation, also known as hearing fatigue. It is only a temporary physiological phenomenon, and the hearing organs are not damaged. If working under strong noise for many years, the inner auditory organs are often stimulated by strong noise, and this auditory fatigue will be fixed and will not return to normal, resulting in permanent hearing loss or hearing threshold shift. This phenomenon is called noise deafness.
Cause
Cause
Because the noise is harmful to people's hearing, the high-frequency hearing threshold is damaged, and the middle ear is deaf, and the eardrum is broken. It is generally expressed as a decrease in stimuli and sound sensitivity similar to its frequency, but this reduction is generally temporary, and the sensitivity of the auditory organ returns to normal after a short period of stimulation of the stimuli. The degree of noise hazard to human hearing is closely related to the form, intensity, frequency and exposure time of the noise.
Examine
an examination
Related inspection
Hearing examination ear examination
Diagnosis can be made based on the patient's long-term noise environment and hearing conditions. The recording lead and main inspection parameters are similar to the brainstem evoked potential test, but the recording time is 100 ms, and the filtering bandwidth should be 20-250 Hz. Shorter pure tones (2ms up/down, 2ms platform) for longer durations can be used to increase the frequency specificity of the exam.
Diagnosis
Differential diagnosis
Differential diagnosis of hearing fatigue:
1. Hearing loss: Normal hearing refers to a category of hearing sensitivity, which is the average value of normal young ear hearing measurement in healthy young people, not an absolute value. Hearing impairment occurs when a sound or sensory portion of the auditory system is damaged or functionally impaired, commonly referred to as hearing loss. The degree of hearing loss is light and heavy, light is heavy, and heavy is sputum. Generally speaking, deaf people mean that practical hearing is almost completely lost. Children have lost their hearing since childhood, and their chances of learning a language are hoarse.
2. Hearing defects: Moderate hearing loss refers to a hearing loss of 40-70 decibels, severe deafness refers to a hearing loss of 70-90 decibels, and deep deafness refers to a hearing loss of more than 90 decibels. Of course, regardless of the degree of deafness, medical testing and medical treatment are needed. Observing hearing defects in very small babies is not an easy task. Despite his baby's hearing impairment, he can still smile, kick his legs and react to the sound. Because the sound is accompanied by a stream of air, the baby feels and turns his head, making it difficult for parents to find his hearing defects. Because of this, it is very important and very important to check your hearing regularly after your baby is born. Conductive deafness, related to the outer and middle ear. The main cause of disability is severe chronic otitis caused by recurrent severe otitis. The main feature of conduction deafness is that hearing is usually mild to moderate. Therefore, treatment must be carried out as soon as possible. The statistics are worrying: 1/3 of the babies are suffering from this ear disease for two consecutive months before the age of three. But we don't have many babies to develop the number of conductive deafness. This disease can be cured with antibiotics and tympanic intubation. But if these methods do not improve your baby's hearing, then he may have sensory deafness, but it is not detected.
3. Hearing impairment: Hearing impairment refers to the structural defects of the auditory organs due to congenital or acquired causes, or some or all of the obstacles to the function, resulting in difficulty in listening or identifying the sound; the criteria for identification are as follows:
(1) After receiving a self-conscious pure tone hearing test, the hearing frequency of the good ear is more than 25 decibels.
(2) Those who are unable to accept the previous paragraph's self-conscious pure tone hearing test, who are determined by his or her perceptual hearing test.
Diagnosis can be made based on the patient's long-term noise environment and hearing conditions.
