hearing aids are the gospel for patients with hearing abnormalities. The elderly, deaf children and adults with progressive hearing loss
what environments should hearing aids be avoided?
first of all, don’t wear it in excessively noisy environments and occasions. No matter how good a hearing aid is, it’s not as good as human ears. The upper limit of high frequency for normal hearing of human ears is 20000 Hz, and the hearing aid can reach 8000 Hz at most. If the environment is noisy, the effect of wearing a hearing aid to improve hearing is very general, or even has no practical effect.
secondly, do not use it in a humid environment, let alone swim with a hearing aid. Because hearing aids are electronic high-tech equipment, they are afraid of moisture and water, so we must pay attention to the precautions in the use process, otherwise it will not only affect the use effect, but also greatly reduce the service life of expensive hearing aids.
again, do not carry out strenuous sports when wearing a hearing aid, because the hearing aid is afraid of falling. If you wear a hearing aid for running and playing ball, it will affect the service life of the hearing aid in case it falls out.
in addition, people who need to wear hearing aids should be reminded that hearing aids are professional hearing aids that need to be adjusted before wearing. People with hearing impairment must go to a formal institution to receive a comprehensive audiological examination, which will be matched by professionals. Don’t buy and wear it at will, so as not to damage the residual hearing. If the quality of hearing aids is unqualified and the fitting is inappropriate, further hearing damage may be caused.
Applicable population
① according to the calculation of the average loss of language frequency of pure tone audiogram, those with a threshold of 0 ~ 30dB do not need to use hearing aids. 30 ~ 45dB is available and can not be used. It is decided to select according to the situation. 45 (or 40) ～ 90dB should be recommended for use, and most of them can obtain satisfactory results. The effect of 90 ~ 110dB is not good, but it is suggested to use high-power hearing aids before the age of 2 ~ 3 for infants and children, which is of great significance to develop oral ability by using residual hearing.
② most people who are deaf and dumb since childhood, even if their hearing is 55 ~ 70dB, and start using hearing aids after they are over 8 ~ 12 years old, will not get satisfactory results. Hearing aids should be used before the age of 5 or 6 at the latest.
③ if the binaural loss is consistent and the dynamic range is similar, the binaural hearing aid effect is the best.
④ the difference of binaural hearing loss is greater than 30dB. One ear hearing aid can be worn on the side with high language discrimination and large dynamic range.
⑤ the hearing loss of one ear is less than 40dB, while that of the other ear is about 60 ~ 70dB, which should be used for the latter.
⑥ the hearing loss of one ear is 60 ~ 70dB, while the hearing loss of the other ear is much greater than this value, so it should be used for the former.
⑦ if the fluctuation of binaural hearing curve is inconsistent, it should be used on the flat side.
⑧ for patients with positive revitalization phenomena such as senile deafness, noise deafness and drug toxic deafness, it shows that they are mainly damaged by hair cell lesions in the inner ear and their tolerance to loudness changes is reduced. Hearing aids with automatic gain control (AGC) (or AVC, arc) and PC devices should be recommended.
⑨ hearing aids are effective for long-term recurrent functional deafness (hysterical deafness or neurosis deafness).
⑩ hearing aids cannot be used for all deaf children, but scholars in some countries advocate that all deaf children use high-power hearing aids before the age of 1 or 2, and the comprehensive communication method is helpful to develop language communication skills. One ear is completely deaf and the other ear is normal. Generally, hearing aids are not used, but recently, some hearing experts in some countries advocate the use of & ldquo; Contralateral signal crosslinking (cros) type & rdquo; Hearing aid, that is, the microphone wearing hearing aid on the deaf ear, and the receiver leads the sound into the healthy ear, which is helpful to listen to the sound signal from the side of the bad ear. Binaural hearing aids shall be used when the binaural hearing loss reaches more than 70dB. In order to avoid feedback whistling, some countries use so-called binaural contralateral cross-linked (bicros) hearing aids.
About the daily maintenance of hearing aids
patients should often maintain hearing aids. Damp or earwax accumulation can affect the use effect of hearing aids. Careful care and maintenance of hearing aids may extend their service life.
moisture proof
moisture proof is the key to the maintenance of hearing aids. Tell the patient to remember that the hearing aid can’t get water. Be sure to remove the hearing aid when washing, bathing, swimming and raining. The moisture-proof method of any hearing aid is the same. Remove the hearing aid before going to bed every night and put it into a container containing desiccant (if you use it every day, you can open the battery compartment at this time without taking out the battery). When the color of desiccant changes, it shall be treated accordingly and updated if necessary. Do not directly contact the desiccant to prevent the hearing aid from being corroded by the desiccant.
cleaning
proper cleaning can improve the service life and effect of hearing aids. Because hearing aids need to be worn frequently, the excreta produced by human body (such as earwax, ear secretion, etc.) will affect the service life of hearing aids to varying degrees. Therefore, every user wearing hearing aids is required to clean the hearing aids frequently. The specific cleaning methods of the hearing aid are as follows:
after using every day, clean the earwax and sweat on the surface of the hearing aid with a dry soft cloth. For customized machines, check whether the sound tube is blocked by earwax and whether the microphone inlet is blocked by dust. If this condition is found, it shall be cleaned with a special small brush. For the ear back hearing aid, if it is found that the sound guide tube of the ear mold is blocked by earwax, it shall be cleaned in time. If there are small water droplets in the sound tube of the ear mold, the small water droplets shall be sucked out or dried forever. For cassette hearing aids, the earwax in the earplugs should be cleaned. Storage of
batteries
when purchasing hearing aid batteries, pay attention to the battery model, do not buy too many at one time, and store them in a cool and dry place.
when users do not use hearing aids, they should open the battery compartment door and take out the battery. When the battery power is lower than a certain level, the hearing aid will stop working or emit & ldquo; Tick & rdquo; If the sound quality becomes rough and unstable, replace the battery immediately and pay attention to the polarity of the battery during replacement. If it is not used for a long time, the battery shall be taken out and placed separately to prevent the battery leakage from corroding the hearing aid.