What is the reason why the sound in the ears becomes smaller?

I believe that many people will find that their hearing is weakened in their lives. There are many reasons for this phenomenon, such as conductive hearing loss, sensorineural hearing loss, mixed hearing loss, etc. For ear problems, you cannot check them by yourself. You still need to go to a regular hospital for targeted examinations. This way you can find out the cause more accurately and then provide treatment.

1. Conductive hearing loss

The lesions are in the outer ear and middle ear, and in a few cases, damage within the cochlea may also manifest as conductive hearing loss.

2. Sensorineural hearing loss

It is a disease caused by lesions of the cochlea and the back of the cochlea that makes it impossible or difficult to perceive sound. According to the different anatomical locations of the lesions, they can be divided into four categories.

1. Cochlear deafness is caused by various reasons such as ototoxic drug poisoning, which leads to hair cell lesions, so that the stimulation of sound waves cannot produce normal electrical activity.

2. Neurological hearing loss is caused by cochlear nerve lesions that prevent the electrical activity of hair cells from causing the proper excitement of the nerves or from being transmitted to the brainstem.

3. Brainstem deafness: Lesions in the brainstem prevent the impulses of the cochlear nerve from being transmitted to the cortical center.

4. Cortical deafness is a disease that impedes the ability to perceive and comprehensively analyze transmitted information. The auditory system on each side is controlled by the cortical centers on both sides. Therefore, cortical hearing loss can only be caused by lesions in the centers on both sides.

3. Mixed deafness

It is deafness caused by the same reason or two different reasons in both the sound transmission and sound sensory parts. For example, long-term suffering from chronic suppurative otitis media can cause bacterial toxins to invade the labyrinth and cause damage to the cochlea, or suffering from mumps on the basis of chronic suppurative otitis media.

4. Functional deafness

There is no organic disease, such as psychogenic deafness, and the hearing curve is unstable, but it is "true deafness", which is common in patients with hysteria or neurosis. Pseudo-deafness is purely pretending to be deaf, and most cases are unilateral "total deafness".

Diagnosis of hearing loss

1. Medical history

The cause of deafness should be found out as much as possible for every deaf patient, and detailed medical history is extremely important for the diagnosis of deafness. The following points should be emphasized when taking medical history.

(1) Whether the deafness is congenital or acquired

Congenital cases are often characterized by the failure or maldevelopment of the spiral organ and related structures. The acquired type is related to the degeneration of the peripheral receptors in the inner ear.

(ii) Whether there are genetic factors

About half of severe childhood deafness is hereditary.

(III) Whether the deafness is accompanied by abnormalities in other parts of the body

Abnormalities of other organs are often related to congenital or genetic factors.