hearing threshold rise
Introduction
Introduction As we all know, we call the ability of the auditory organ to feel the sound as hearing, and the clinical evaluation of the hearing is to find a standard that can be standardized by numbers. This is the role of the listening threshold. When the hearing is clinically measured, the average value of the hearing thresholds of the hearing normal persons of about 20 years old is generally taken as 0 dB, and the number of decibels of the hearing loss of the patient is measured. If the patient's hearing loss is more than 30 dB, that is, the hearing threshold of the frequency is increased by 30 dB, it can be diagnosed as deafness. The noise is very strong and the peak of the spectrum changes greatly. When the noise such as jumping and lowering damages the ear, it will cause the hearing threshold to rise.
Cause
Cause
The noise is very strong and the peak of the spectrum changes greatly. When the noise such as jumping and lowering damages the ear, it will cause the hearing threshold to rise.
Examine
an examination
Related inspection
Otoscopy, Otolaryngology, CT examination
The response to the instantaneous detonation wave is immediate hearing fatigue and hearing threshold rise, a good temporary threshold shift, which is a reversible lesion. It can return to normal after 1 to 2 hours of rest, sometimes it takes several days or weeks to fully recover. Due to the different location of the contact source, the hearing loss of the two ears can be different by 20dB. The damaged area first appears in the valley at 6kHz, which is twice as much as that at 4kHz. If you repeatedly accept knocking, it becomes an irreversible permanent threshold shift, which becomes permanent deafness. According to Wang Bozhen (1982) in the investigation of the Vietnam self-defense counterattack, 59.9% of people with sensorineural deafness, mixed 8.9%, and mental 0.5%. In acute injuries, many complained of ear pain and tinnitus, and half of them had headache and dizziness. Due to vestibular membrane dissection and degeneration, vertigo sometimes resembles Meniere's disease, sometimes like positional vertigo, which can last for months to years.
Diagnosis
Differential diagnosis
Differential diagnosis of hearing threshold rise:
1. 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.
2. Hearing fatigue: 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 is also inaudible. This is because of your hearing threshold. Move up, causing your hearing to drop. 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.
3. 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.
The response to the instantaneous detonation wave is immediate hearing fatigue and hearing threshold rise, a good temporary threshold shift, which is a reversible lesion. It can return to normal after 1 to 2 hours of rest, sometimes it takes several days or weeks to fully recover. Due to the different location of the contact source, the hearing loss of the two ears can be different by 20dB. The damaged area first appears in the valley at 6kHz, which is twice as much as that at 4kHz. If you repeatedly accept knocking, it becomes an irreversible permanent threshold shift, which becomes permanent deafness. According to Wang Bozhen (1982) in the investigation of the Vietnam self-defense counterattack, 59.9% of people with sensorineural deafness, mixed 8.9%, and mental 0.5%. In acute injuries, many complained of ear pain and tinnitus, and half of them had headache and dizziness. Due to vestibular membrane dissection and degeneration, vertigo sometimes resembles Meniere's disease, sometimes like positional vertigo, which can last for months to years.
