The elderly at home have been equipped with hearing aids several times, but the effect is not good. What should I do with the rumbling?

Honoring parents starts with caring for their hearing health.Long-term inability to hear will bring a lot of trouble to the life of the elderly. For example, if you go out without hearing the whistle of a car, the risk of accidents for the elderly will greatly increase.

Hearing aids, like cochlear implants, are hearing aids. The earliest hearing aids simply amplify the sound. The hearing aids used today can selectively amplify sounds of different frequencies according to the hearing of each frequency and the needs of the patient, which is also called nonlinear amplification. , So that the patient feels that it can be heard in a low voice, and it is not too noisy when it is loud.If the effect of hearing aids is not good, first check the quality and power of the hearing aid itself; secondly, when the elderly wear hearing aids, evaluate the hearing threshold and speech recognition ability of hearing aids.If the elderly’s hearing reaches severe or severe sensory deafness, the quality and power of the hearing aids are not problematic, but the hearing aids still do not achieve the desired effect, it means that the elderly’s deafness is indeed very severe, and it is necessary at this time. Consider implanting a cochlear implant to improve hearing.

Howling:The technical term is acoustic feedback.There are two types of hearing aids: internal howling and external howling.If it is the internal whistling of the hearing aid, it may be caused by the deviation of the internal speaker and microphone due to vibration during use, or the hearing aid parts are faulty and need to be sent to the factory for repair.

Howling inside the hearing aid:As the name suggests, internal hearing aid whistling is the whistling of hearing aids caused by problems inside the machine. It is customarily called internal acoustic feedback.

Reasons for internal whistle:
The main reasons for the internal whistling of hearing aids are: the internal space of the hearing aids is too small, so that the components are squeezed together, and it is easy to self-excited to produce whistling. Large) hearing aids are more common; the relative position of the internal components of the hearing aids is not good; the internal components are displaced by vibration; the size of the customized machine is too small; the microphone and the receiver are too close to transmit feedback through vibration; the receiver and the sound tube are not connected, etc. .The reasons for the formation of positive feedback on the circuit are: poor insulation between components, moisture entering the inside of the hearing aid and causing leakage, internal wires not being organized, and unreasonable circuit design.Many internal squeals are generated during production, which can be found by factory inspection, and generally will be resolved within the factory.The usual solutions are: use a smaller receiver without affecting the effect of the hearing aid; appropriately increase the volume of the housing and keep the microphone away from the receiver without affecting the appearance of the hearing aid; readjust the relative position of the components; The receiver has better shock protection; reduced power, etc.

Preventing internal whistling of hearing aids should be done from multiple aspects. First of all, of course, the production and inspection steps in the factory should be well controlled; secondly, users should avoid the impact and vibration of the customized machine from falling; more importantly, the concealment and power should be better balanced. In particular, users and fitters should have a reasonable expectation on the shape and power of the customized machine. Making a small shape and increasing the power are a pair of contradictions. If it is not handled well, it may lead to internal whistling and reduced reliability. And other issues.

Usually, more than 80% of the custom-made machine whistling is caused by external whistling, and the causes of external whistling are more complicated. It is particularly important to find out the cause and prescribe the medicine.

Internal squeal solution:Generally speaking, the internal hearing aid whistle treatment is produced during production, so it needs to be turned on for maintenance. The solution should be: try to use a small receiver without affecting the effect of the hearing aid; try to increase it without affecting the aesthetics. Large size of the hearing aid shell; try to avoid the receiver and other parts of the hearing aid from getting damp; pay attention to shockproof when using it; when necessary, send the hearing aid back to the manufacturer for repair.

External whistling of hearing aids:The so-called external hearing aid whistling refers to the whistling caused by non-hearing aid internal factors.

Causes of external whistle:

1. Impression (ear sample)
Impressions are the source of the manufacture of customized machine shells. The quality of the impressions directly affects the sealing and comfort of the shell after it is completed. The more severe the patient’s hearing loss, the higher the requirements for the impression.The completeness of the impression is necessary, and the repaired impression is definitely different from the complete and unrepaired one; the insufficient length of the ear canal part of the impression may also cause external squeal.This is because the shorter the ear canal part, the looser the hearing aid will be worn, which often prevents the hearing aid from being positioned in the ear canal and slides out; in addition, the short ear canal makes it difficult for the production staff to distinguish the direction of the ear canal, which is easy to cause The sound hole faces the wall of the ear canal to reflect the sound and cause howling.
2. Optional
In many cases, the patient feels that the sound of the hearing aid is soft, so the volume should be increased to almost full, resulting in howling.The ideal position of the hearing aid volume potentiometer should be between one-half to two-thirds. Any line has its optional range. If it exceeds this optional range, the hearing aid should always work under full load, even There is no howling.The service life of hearing aids will also be greatly reduced. Therefore, we believe that it is more reasonable and effective to select suitable models, circuits and matrices at this time than to rebuild the shell.Adding a vent hole is one of the ways to make the patient more comfortable to wear, but sometimes it is also the culprit of howling. At this time, reducing or even blocking the vent hole can often lead to immediate results.Reasonable use of fine-tuning is also an effective means to reduce howling.Under the premise of not affecting the effect of hearing aids, it is also effective to use NL to fine-tune or reduce the high-frequency gain (programming machine) to appropriately reduce the high-frequency when matching.
3. Making
Excessive cutting of ears, uneven waxing, unreasonable sealing ring settings, and excessive polishing in the subsequent process may affect the sealing performance of the housing. The wrong direction of the sound hole may also cause howling.In addition, the balance of volume and power must be mastered during production.If problems with ear samples or matching are found during production, they should communicate with the fitter in time to seek solutions.For those with defective ear samples, you must not just do it. It is necessary to re-take the ear samples, otherwise it will waste resources and be irresponsible to the user.

External whistling solution:The solution to external hearing aid whistling can be as close as possible to your own ear canal when buying hearing aids. Hearing aid In order to reduce the probability of howling from hearing aids, if possible, it is best to go to a special fitting center to customize it according to the individual’s ear canal situation.

Other reasons will appear as you said:
1. The grade of hearing aids is low, and the noise reduction function is not good, such as analog machines and some low-end digital machines, it is recommended to upgrade the grade;
2. Hearing aid wearing problem, if you don’t wear it well, if you can’t wear it in the fitting shop, let them teach it;
3. For hearing aid debugging problems, go to the fitting shop for debugging as soon as possible;
4. The elderly themselves have tinnitus similar to the rumbling sound, which needs to adapt or go to hospital for treatment;

Tips:The longer the hearing loss, the more the ability to listen to language in a noisy environment will be lost. Therefore, we hope that every elderly person with hearing loss can be fitted as soon as possible Hearing aid , Intervene as soon as possible, and learn the ability to listen again.When you first wear a hearing aid, you will feel that your voice is louder than the outside world, and you may even be unable to hear your own voice clearly or pay too much attention to your own voice. We recommend that you can learn your own voice through daily recitation exercises. Gradually we will ignore our own voice.

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