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rb Where is the best place to get hearing aids in Jiading, Shanghai?
rb What does the position of the microphone of a behind-the-ear hearing aid indicate? As a hearing aid for the deaf, the position of the microphone opening of the behind-the-ear hearing aid is very important. Just imagine, if the opening is curved on the inside of the body, the input sound signal will be blocked by the pinna during use. If the opening is curved on the outside of the body, the sound signal received from behind is inversely stronger than the signal from the front, which sounds extremely unnatural. Obviously, the ideal position should be the upper edge of the behind-the-ear hearing aid, close to the ear hook. Early behind-the-ear hearing aids had the microphone opening at the bottom rather than at the top edge. This is not an oversight on the part of the manufacturer, but a limitation of the hearing aid manufacturing technology at the time. The microphone opening is at the lower end, which not only limits signal collection, but also easily rubs against the collar, producing unnecessary noise and affecting the use effect.
The microphone of the improved behind-the-ear hearing aid is moved slightly below the upper edge and opens to both sides. The problem has improved, but the effect is still not ideal. Since then, with the advancement of hearing aid technology, the microphone opening has been placed under the earhook tube at the top of the upper edge of the hearing aid. Only in recent years have they been moved to the earhook tube and often covered with a windshield.
Tip: Since the position of the microphone of behind-the-ear hearing aids has the characteristics of the times, observing its position can roughly estimate its design or production time. This also gives us the right to evaluate whether the behind-the-ear hearing aids used by patients should be updated.
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Where is the best place to get hearing aids in Jiading, Shanghai? rb On Double Eleven, of course, go to Ning'er Hearing Shanghai Jiading Brand Hearing Aid Discount Store to choose hearing aids, the price is discounted, and the quality is guaranteed!
Special promotions are held on Double Eleven! At the Ning'er Hearing Shanghai Jiading brand hearing aid discount store, all models of hearing aids (Siemens from Germany, Oticon from Denmark, ReSound from Denmark, Phonak from Switzerland, Starkey from the United States, etc.)) Double Eleven promotion offers are all brand new and original. One machine, one code!
You can call the hearing aid manufacturers of various brands to check the codes and machine information! There is no such thing as a reworked machine or a refurbished machine!
Ning'er Hearing sells hearing aids from international first-tier brands, with guaranteed quality! Customers please rest assured to buy! )More discounts
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Three-channel fully digital manual behind-the-ear machine, original price RMB, current price RMB. The original price of high-quality imported behind-the-ear machines is RMB/unit, the current price is RMB/unit, and there is a limit of one unit per day. rb,
Special launch of Starkey fully digital signal processing, computer programming, automatic telephone response, multi-channel, multi-program in-ear standard customized machine/set, frequency band composite compression, standard in-ear hearing aid/set. ),
On the day of Double Eleven, in addition to enjoying discounts (except for special price machines), you can get free imported electronic dryers, free custom-made ear molds, and free one-year imported batteries. ),
Starkey has recently launched three invisible hearing aids: black rose, red rose, and blue rose. They combine a number of industry-leading technologies to create magic for you! ),
A high-power deep-in-the-canal all-digital hearing aid, buy one and get one free. )Activity time
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There are many empty-nest elderly people, patients without children, unable to walk and bedridden. They are eager to communicate and communicate with their families and friends, and experience the wonderful society with sound. They actually need more care. However, due to mobility issues, Ning'er Hearing Jiading Discount Store provides them with the same rb free door-to-door fitting, hearing test, try-on and various hearing examination activities as the fitting center
to achieve the goal of staying home. It can perfectly solve hearing problems at home. Jiading District Shanghai provides free door-to-door hearing aid fitting for the elderly. Service scope: Anting, Caowang, Fengbang, Fengzhuang, Huangdu, Huating, Jiading urban area, Jiading New Town, Jiading surroundings, Jiangqiao New Town, Jinhe New Town, Ju Yuanxin District, Loutang, Malu, Nanxiang, Tanghang, Waigang, Xuhang, Zhenxin, Zhuqiao.
rb Shanghai Brand Discount Hearing Aid Fitting Center (rb Putuo Liziyuan Store
)
rb
) Building No. Liziyuan Business District, Jiaotong Road, Putuo District, Shanghai (Subway Line No. 1, Liziyuan Station, Exit No., opposite Shanghai Tianyou Hospital of Tongji University)
rbTelephone
:
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Classification and use of hearing aid desiccants
Routine maintenance of hearing aids is inseparable from desiccants. Regarding the classification and use of hearing aid desiccants.
Ordinary desiccant: Ordinary desiccant uses color-changing silica gel to absorb water vapor to achieve the purpose of drying and absorbing moisture. Color-changing silica gel, also known as blue gel, has a strong adsorption effect on water vapor in the air. As the amount of moisture absorption increases, the color of the silica gel will change, from blue to light red. Ordinary desiccants are cheap, easy to use, and can dry for a long time. During daily use, you need to pay attention to the following issues:
After using ordinary desiccant, please close the lid tightly in time
Observe the color of the discolored silica gel. If the color becomes lighter or light red, it is best to Replace with new color-changing silica gel
. It is best to place a sponge or cotton cloth between the color-changing silica gel and the hearing aid to prevent silica gel particles from entering the hearing aid
. Put the hearing aid into a desiccant. Please put The battery compartment door is open.
Electronic desiccant: Electronic desiccant uses commercial power to heat the heating element at a constant temperature and uses heat to evaporate water vapor to achieve the purpose of drying and absorbing moisture. Currently, there are many types of electronic dryers on the market. Some of them not only have working attitude indicators, but also have timing devices. Users can choose and buy according to their own needs. When using an electronic dryer, please read the product instructions carefully. Different products have different durations of drying time. Generally speaking, the temperature of electronic dryers is set between degrees ~ degrees, which will not cause damage to hearing aids, but it is recommended that the drying time for a single period should not exceed an hour.
When using an electronic dryer, you should pay attention to the following issues: Do not dry the hearing aid in the electronic dryer for a long time. When the electronic dryer is working, please close the lid tightly and put the hearing aid in the electronic dryer. When using the dryer, please open the battery compartment door. It is best to take out the battery and place it properly. If the electronic dryer is not used for a long time, please unplug the power supply to extend the service life and save energy.
As long as we dry timely and effectively, we can stay away from the erosion of sweat, and moisture-proofing is no longer a problem. Let us all take action to prevent moisture and protect our hearing aids.
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How to deal with the whistling of customized hearing aid machines
When hearing aids are repaired, the problem of howling from customized machines has always been one of the main reasons that affect the satisfaction of patients and dealers with customized machines. , in fact, as long as we treat the whistling problem objectively and rationally and find out the crux, it is not impossible to reduce or even avoid the occurrence of whistling. The howling of the customized machine is divided into two types: internal and external, which are discussed separately here.
The main reasons for the internal whistling of the hearing aid are: the internal space of the hearing aid is too small, causing the components to be squeezed together, which easily causes self-excitation to produce whistling. This is a problem for gain (especially high-frequency gain) and power (which is relatively large). It is more common for hearing aids (meaning the receiver is larger). The relative position of the internal components of the hearing aid is not good. Vibration causes the internal components to shift. The customized machine is too small. The microphone and receiver are too close. Feedback is transmitted through vibration. The receiver and sound tube are not connected properly. etc. . The reasons for the formation of positive feedback on the circuit include: poor insulation between components, moisture entering the inside of the hearing aid causing leakage, internal wires not being arranged properly, unreasonable circuit design, etc. Internal whistling is mostly generated during production and can be discovered by factory inspection. Generally speaking, it will be solved within the factory. Common solutions include: using a smaller receiver without affecting the effect of the hearing aid; appropriately increasing the size of the casing without affecting the appearance; moving the microphone away from the receiver; re-adjusting the relative position of the components to provide a better fit for the receiver. Anti-vibration protection reduces power, etc.
Preventing internal howling in hearing aids must be carried out from multiple aspects. First of all, the production and inspection steps in the factory must be carefully controlled. Secondly, users must prevent the customized machine from falling and being affected by shock and vibration. More importantly, it must be better balanced and concealed. and power requirements. In particular, users and fitters should have reasonable expectations for the shape and power of customized machines. Smalling the shape and increasing the power are a pair of contradictions. If not handled properly, internal howling and reliability may occur. Problems such as sexual decline.
Usually the above-mentioned whistling of customized machines is caused by external whistling, and the causes of external whistling are more complicated. It is particularly important to identify the cause and prescribe the right medicine:
, impression (ear sample)
Impressions are the source of making customized machine shells. The quality of the impressions directly affects the sealing and comfort of the finished shells. The more severe the patient's hearing loss, the higher the requirements for the impressions. The integrity of the impression is a must. There will definitely be a difference between a repaired impression and a complete and unpatched impression. Insufficient length of the ear canal part may also cause external howling. This is because the shorter the ear canal, the looser the hearing aid will be, which often makes the hearing aid unable to be positioned in the ear canal and slides out. In addition, the ear canal taken is too short, making it difficult for the production staff to identify the direction of the ear canal, which can easily cause sound The hole faces the wall of the ear canal causing sound to reflect off and cause howling.
, Optional
In many cases, patients feel that the sound of the hearing aid is light, so they increase the volume to almost full, resulting in howling. The ideal position of the hearing aid volume potentiometer should be between one-half and two-thirds. Any line has its optional range. If it exceeds this optional range, the hearing aid must always work at full load, even if No howling. The service life of the hearing aid will also be greatly reduced. Therefore, we believe that it is more reasonable and effective to select the appropriate model, circuit and matrix at this time than to redo the shell. Adding ventilation holes is one of the ways to make it more comfortable for patients, but sometimes it is also the culprit of whistling. In this case, reducing or even blocking the ventilation holes can often have immediate results. Reasonable use of fine-tuning is also an effective means to reduce howling. Without affecting the effect of the hearing aid, it is also effective to use fine-tuning or reducing the high-frequency gain (programming machine) to appropriately reduce the high frequency when selecting and matching.
, Production
During the production of the shell, excessive ear cutting, uneven waxing, unreasonable sealing ring settings, excessive polishing in subsequent processes, etc. may affect the sealing performance of the shell and the sound hole. Wrong direction may also cause howling. In addition, the balance between volume and power must be mastered during production. If you find problems with the ear sample or fitting during production, you should communicate with the hearing professional in a timely manner to seek solutions. If the ear sample is defective, you must not make do with it. It is necessary to take another ear sample. Otherwise, it will be a waste of resources and irresponsible to the user.
rb Ning'er Hearing Address
rb, Shanghai Brand Discount Hearing Aid Fitting Center (rb Jing'an Zhongshan North Road Store
)
)
Shanghai, Jing'an District, Zhongshan Room No. North Road (Exit of Tibet North Road Station of Metro Line, upstairs of Jing'an Taxation Bureau) Telephone
rb, Shanghai Brand Discount Hearing Aid Fitting Center (rb Pudong Babaihan Store
)
)< br/> Address: Room, Dongchang Building, No. Dongchang Road, Pudong New Area (Exit of Metro Station Shangcheng Road/Subway Line Dongchang Road, near the intersection of Pudong Yaoban Dongchang Road and Pudong South Road) Telephone
rb, Shanghai Brand Discount Hearing Aid Fitting Center ( rb Putuo Liziyuan Store
)
)
Room No., Liziyuan Business District, Jiaotong Road, Putuo District, Shanghai (Metro Line Liziyuan Station No. Exit, opposite Shanghai Tianyou Hospital of Tongji University) Telephone
rb, Shanghai Brand Discount Hearing Aid Fitting Center (rb Minhang Qibao Store
)
)
Shanghai, Minhang District, Qibaoqi Xin Road (Exit No. Qibao Station of Metro Line, near Songjiang Jiuting) Telephone
rb, Shanghai Brand Discount Hearing Aid Fitting Center (rb Baoshan Gucun Store
)
)
Shanghai, Baoshan District, Luxiang Road, Nongzheng Dalecheng Building, close to Jingbohu Road (Metro Line Gucun Park Station, opposite Huashan Hospital Affiliated to Fudan University) Tel
rb, Shanghai Brand Discount Hearing Aid Fitting Center (rb Changning Zhongshan Park Store
)
)
Shanghai, Changning District, Kaixuan Road, Building (Exit of Yan'an West Road Station of Metro Line, near Donghua University) Tel
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Disadvantages of Hearing Aid Microphones
The main disadvantage of microphones is that they will eventually break if exposed to unfavorable chemicals such as sweat
Less concerning is that all electronic components produce Small amounts of random electrical noise, and microphones are no exception. Noise can cause irregular movement of air molecules relative to the diaphragm, and can also cause irregular electrical movement inside the microphone amplifier. After this noise is fully amplified by the hearing aid amplifier, it can sometimes be heard by hearing aid users in a quiet environment, especially users whose hearing at certain frequencies is close to normal.
Another disadvantage of microphones is their sensitivity to sound
The first result of a microphone being sensitive to vibrations is that any vibrations are amplified and become annoying sounds. For example, if you rub the hearing aid body (for example, if your clothes are close to the hearing aid), you can hear this sound directly vibrating the hearing aid body, or you may also hear this annoying loud noise when sliding on a hard surface. The second result is that the hearing aid receiver produces vibrations that sound like sound when it operates. The microphone picks up some of the vibrations and converts them into electrical signals, which are then amplified by the hearing aid and passed through the receiver, creating larger vibrations. If the mechanical transmission of such vibrations from the receiver to the microphone is strong enough, and/or the gain of the hearing aid is high enough, this feedback loop may cause audible vibrations, typically at low frequencies. Hearing aid designers try to avoid this feedback through careful mounting and placement of the microphone and receiver, but if either of them changes position, the hearing aid can become unstable due to internal feedback. If the microphone is mounted at the entrance of a long, slender tube, the Helmtz resonance will shift downward in frequency. This results in a larger peak in the gain frequency response and a rapid rise in gain at frequencies above the peak frequency.
A final disadvantage of microphones is wind noise
Turbulence is created when wind hits an obstruction such as the head, pinna of the ear, or hearing aid. Turbulence consists of pressure fluctuations, and the microphone indiscriminately converts these turbulences into sound, so that low-mid-frequency noise is heard. Keeping the microphone entrance away from the wind can reduce the amount of wind noise. An unpopular solution, although discreet and effective, is to put some plastic foam at the microphone port. Second, a better method is to place the microphone port deep into the ear canal, hence the emergence of deep-canal hearing aids. A third, less effective option is for the manufacturer to place a mesh screen over the open mic port so that there is less turbulence entering the mic port.
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With the advancement of digital hearing aid technology
, the flexibility of compression characteristics control has been further increased, and it has become more convenient to adjust the inflection point and compression ratio of hearing aid compression.
, realizes intelligent automatic processing of hearing aid gain and frequency response, and can set the gain and compression characteristics of different frequency bands in different channels according to the hearing loss characteristics of the hearing-impaired.
, realizing nonlinear automatic control of the gain of sounds from different directions to minimize noise.
, the gain can be effectively increased through digital acoustic feedback control.
Compared with analog hearing aids, which process sounds in the same way, battery consumption is reduced.
The digital dual microphone automatic correction function realizes intelligent control of sound gain from different directions.
. The low-voltage reminder function of digital hearing aids makes it easier to replace batteries, and the anti-electromagnetic interference function makes phone calls clearer.
Digital hearing aids provide various options for various types of hearing loss today, which can better help your hearing.
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During fitting, by calibrating the hearing aid, up to 10% of the high-frequency headroom gain can be increased. More high-frequency headroom gains can not only effectively improve speech intelligibility, but also allow users to listen more effectively. When listening to the music of birds, you can regain the beautiful sounds, solving the problem of users being unable to hear clearly. The vents can also be made larger and more open, increasing the user's wearing comfort. In fact, ReSound, as the leader of D feedback suppression, currently applies industry-leading or relatively leading technologies to all products, including: Stabilizer D: Provides stable headroom gain with a gain value of . It is more accurate than traditional D in removing feedback. Dual Stabilizer D: Built-in two independent sets of feedback monitoring paths, when feedback occurs, it can remove feedback sound more quickly and accurately without affecting speech information. Provides stable headroom gain up to. In fact, the dual stabilizer D can handle the feedback that occurs in most situations very well. Super D, based on the work of dual stabilizers, provides higher headroom gain (). Feedback safety wall: The additional function of feedback suppression provides the greatest background protection against howling. It is used in conjunction with dual stabilizer D and super D to ensure foolproof feedback removal.
Shanghai Jiading Hearing Aid Store