First of all, hearing AIDS are divided into two kinds from the function: analog machine and digital machine
analog machine
The simulator is a relatively original hearing aid, and the principle is similar to an amplifier. You just have to turn the sound up, and you have a volume button to adjust the sound. The advantage of this hearing aid is that you can adjust the size of your own voice, which is more convenient, you do not need to go to the hearing center and the price is cheap. However, the disadvantages are also obvious. Because there is no need to go to the matching, the effect is generally not guaranteed, if you have mild hearing loss, because it does not reduce noise, it will make you feel very noisy; If you have heavy hearing, because there is no special fitting, there is no custom ear mold, there will be a screaming phenomenon with ear plugs. Moreover, it can only amplify all sounds uniformly, and can not be amplified by bands like digital machines, so unless your hearing loss is the same in all frequencies, you will sound either dull or sharp, and there will always be some discomfort. Of course, the more important point is that it does not protect your ears. Because it amplifies all the sounds uniformly, that is to say, as much as the sound of whispering is amplified, so is the sound of firecrackers. If you wear this hearing aid and suddenly a loud one comes, it is likely to cause permanent damage to your ear. Therefore, unless you really have no money, it is generally not recommended to choose a simulator.
Digital machine:
Compared with analog machines, digital machines are a little more high-end. Digital hearing AIDS are debugged by computer software, and hearing AIDS are debugged by audiologists according to each person's hearing condition. Therefore, audiologists are very critical, and the machine debugged by a good audiologist and the machine adjusted by a poor audiologist are completely different. If the digital machine, you can adjust the sound by frequency band, that is, we say the channel, a few channels can be divided into several parts to adjust the sound, which is equivalent to the pixel of the camera, the more refined the processing, the higher the clarity. Generally the same manufacturer of hearing AIDS, the more expensive the price of the number of channels will be relatively more. However, the number of channels between different manufacturers is not comparable, only a vertical comparison is required. In addition, digital hearing AIDS have the function of noise reduction, many deaf elderly users are particularly concerned about this, many people do not want to hear some trivial small voices, so noise reduction is very important, and in noisy places to communicate, there is noise reduction this function can also help get more signal sound. Another point is that the digital opportunity has a loud suppression function, for loud, will be limited to the user's discomfort threshold (make people feel uncomfortable the smallest intensity of the sound), to ensure that the hearing aid will not cause damage to hearing. These are the basic functions of digital machines, so the more high-end machines will not only do better in these functions, but also have some other functions, such as: wind noise attenuation, audiability expansion, speech enhancement and so on. In the choice of hearing AIDS, according to their needs to choose the function, you can avoid spending money, choose cost-effective.
In terms of appearance, hearing AIDS are roughly divided into two types: into-ear type and in-ear type. (Box hearing AIDS are not discussed)
Hard of hearing:
Hanging on the ear, the appearance is more obvious, not good-looking, summer sweat is easy to flow into the machine, rainy days should also be especially careful, if you also wear glasses, it may be stuck together, inconvenient. The advantage is that wearing foreign body feeling is relatively small, wearing comfort, power can be made relatively large, not easy to scream, some users with heavy hearing must choose the earback machine, users with light hearing do not need to customize, with earplugs, you can take away immediately. In addition, for users with suppurative otitis media, will often flow pus, if the choice of in-ear hearing aid is easy to cause internal chip corrosion, it is recommended to choose the earback hearing aid. For child users, because the external ear canal is not shaped and is still growing, if you choose the in-ear hearing aid, you need to often replace the shell, which is inconvenient, and you only need to replace the ear mold to choose the into-ear hearing aid.
Ear type:
In-ear hearing AIDS need to be customized according to the shape of each person's ear, like making dentures, first take a model, and then make the shell. The disadvantage of the in-ear hearing aid is that the foreign body sense is strong, it is easy to produce the ear blocking effect (feel the ear is blocked, speak your own voice, sound is very dull), the power is not big (the maximum power of the in-ear hearing aid is roughly 110dB HL), and it is easier to scream than the back-ear hearing aid. Advantages, the most obvious and the most intuitive is better concealment, more beautiful, relatively small impact on life, more convenient. However, due to its small size, the elderly with inflexible hands and feet may not be convenient to use. And wear to the ear canal inside, more in line with physiological characteristics, you can use the auricle, phone calls and so on more convenient.
Brand:
Now the world's six recognized brands are: Vilisten, Risonda, Odicon, Stark, Phonak, Sivanto.
The more famous domestic brands are: Huil, Oustad, Lisheng and so on.
Different brands have their own specialized direction, just like to buy a car, BMW control is good, Mercedes-Benz comfort is good, and no brand is particularly good, as long as you choose the brand according to your own needs.
Price:
The decisive factor in the price is not the appearance, not the inset machine must be cheaper than the in-ear, but the function of the hearing aid and its chip, microphone, speaker and other accessories. Just like buying a computer, a notebook is not necessarily more expensive than a desktop, and what determines the price is its CPU, storage capacity, processor, and so on. Therefore, when we choose hearing AIDS, we can choose the function according to our own needs.
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Finally, how to choose a cost-effective hearing aid that suits you.
I can only say that a good hearing center, a good audiologist is more important than anything else. You go to choose a hearing aid, can not hold a price or a brand to choose, suitable for their own must be done after the examination, the audiologist according to your personal situation to give you a few suitable for your situation of the machine, and then you listen to your own after the choice. Otherwise, each manufacturer has hundreds of hearing AIDS, rely on the manufacturer's advertising, check the Internet, can not choose, suitable for others is not necessarily suitable for their own. I myself in the process of fitting, people often come to me and say: my neighbor or my friend with the XXX hearing aid effect is very good, I also want the same. But your hearing situation is not the same, other people's hearing AIDS are not suitable for you, others may be able to solve the problem thousands of pieces, but you need tens of thousands of pieces of hearing AIDS to meet your requirements. Others may need tens of thousands of hearing AIDS to use, but you may be able to solve it with thousands of dollars. Why hearing AIDS can not be bought directly online, to go to the hearing center, is to be able to experience themselves, only their own experience, just know which is most suitable for their own.
One case is that the hearing aid is not worn well; One is that due to hearing aid debugging, the volume will increase, the original earplug or eardrum sealing can not be copied, there will be a screaming sound, that is, the leakage sound, the need to replace the earplug or eardrum. Third, the hearing aid parameter debugging is not appropriate. We can go to a hearing aid store and get it retuned.