The working principle and use of hearing aids
The working principle and use of hearing aids
Nowadays, hearing aids can be said to be an important means of solving hearing impairment. So, do you know about hearing aids?
Hearing before understanding the hearing aid
Ear damage is roughly divided into three categories: conductive loss, mixed damage and sensorineural nerve damage. The causes of conductive damage include otitis media, sputum occlusion of the external auditory canal, external auditory canal atresia, otosclerosis, etc., while senile ear damage mostly belongs to Sensorineural nerve damage, accounting for the majority.
Patients with conductive lesions can be treated with surgery and medication, while for sensorineural nerve damage, the drug is essentially ineffective. In fact, whether the patient is unilateral or bilateral hearing loss, whether it is conduction loss, sensorineural nerve damage or mixed damage, as long as the hearing loss affects daily conversation, the drug or surgical method is invalid, not all inaudible. To all extent, hearing aids should be selected.
From the working principle, the hearing aid is mainly divided into two types: air conduction and bone conduction. The air conduction hearing aid is to transmit sound through the microphone, and the earphone is like a speaker to amplify the sound and send it to the patient's ear. The bone conduction hearing aid converts the amplified electrical signal into mechanical energy, and transmits the sound by vibrating the internal structure of the cochlea, so it is suitable for patients with air conduction hearing aids such as external or middle ear malformation.
In short, a patient should not wear a hearing aid, what kind of hearing aid to wear, whether to wear it with a single ear or both ears. If it is worn on one side, it should be combined with the nature, degree, history, age, life of the ear loss. Habits and hearing needs, economic affordability and other factors are considered as a whole.
Some old people think that "the old man's back" is a natural law. It doesn't matter if you can't hear it, or you are afraid of spending money, being afraid of trouble, and not wanting to wear a hearing aid. After a long time, the old people will become more and more closed and lonely, and their behavior will be delayed, which will greatly reduce the quality of life in their later years. Therefore, the hearing aid should be worn when worn.
Hearing aids are the most important hearing rehabilitation devices, and the vast majority of hearing impaired people can benefit. However, for patients with severe hearing loss (bilaterally sensitive sensorineural ear damage) and patients with near-total loss, the hearing aid is ineffective and needs to be implanted with a cochlear implant. In addition, bone anchored hearing aids and vibrating acoustic bridges are special forms and are also particularly useful as new hearing aids.
In the selection of hearing aids, in addition to considering the patient's hearing impairment and hearing aid performance, it is necessary to follow the normal process in order to achieve a successful selection. There are usually 8 steps to fitting a hearing aid:
1. Collect the patient's condition, including medical history, confusion caused by hearing loss, what problems you want to solve most, etc., and judge whether there are other rehabilitation methods.
2. Based on the above situation, the patient's hearing condition is checked, and at the same time, the patient is judged whether there is a contraindication to wearing a hearing aid (such as otitis media, ear canal eczema, etc.).
3. Agree with the patient to make them aware that the hearing problem can be helped, and then select a number of different grades for the patient in many brands, but they are suitable for their hearing aids.
4. The patient tries to wear a hearing aid and experience the hearing aid effect, so as to select the most suitable one.
5. When the hearing aid is determined, the ear sample is taken to make the ear mold of the custom machine or the ear machine, and the patient confirms the order.
6. When the patient takes the machine, the doctor will also fine-tune according to their hearing conditions to meet the patient's requirements as much as possible, and evaluate the hearing aid effect and guide the patient to use the hearing aid.
7. The matching work is basically completed, but the patient's hearing and psychological factors may still change, so regular follow-up should be done.
8. For older patients, speech testing is an important assessment and assessment tool for hearing aid selection. In addition, doctors should introduce the characteristics of senile loss to the elderly hearing impaired to help them establish reasonable expectations.
Have a look at the ear loss first.