Hearing AIDS are quoted as: 1. A miniature amplifier made of transistors. External sounds can be amplified and introduced into the inner ear through earplugs. It is mostly used to improve the hearing of hearing-impaired patients. The part of speech is: noun. Pinyin is: ZHT and NGQ and the structure is: hearing aid (left and right structure) (left and right structure) (upper, middle and lower structure). The phonetic notation is: ㄓㄨㄥㄑㄑ _.
What is the specific explanation of hearing AIDS? We will introduce you through the following aspects:
I. Text Description Click here to view the details of the plan.
Hearing aid zhütüngq (1) A device that amplifies the sound transmitted to the receiving organ of the listener.
Second, the national language dictionary
A device hung on the ear to help hearing. The main components are microphone, power amplifier and earphone. Hearing AIDS are divided into two types: air-guided and skull-guided. Air conduction directly transmits sound to the ear, and headphones are installed in the ear. Cranial conduction is to transmit sound to the skull behind the ear, and then the skull transmits the vibration of sound waves to the auditory nerve of the cochlea, making it accept sound. The earphone of this hearing aid is installed behind the ear.
Third, the network interpretation
Hearing aid (hearing aid) sound is produced by the vibration of the object, and vibration is the source of the object sound. Sound is just the movement of pressure waves in the air. Pressure waves vibrate the small bones (ossicles) in the inner ear, and these vibrations are converted into tiny electronic brain waves, which are the sounds we perceive. The inner ear uses the same principle as the sound waves captured by a microphone or the pronunciation of a speaker. Is the relationship between moving mechanical parts and air pressure waves. Naturally, when the acoustic Boeing is turned down and moved slowly and loudly enough, we can actually "feel" the air pressure wave vibrating the body. Figure 1. The hearing aid is a small speaker, which amplifies the originally inaudible sound, and then uses the residual hearing of the hearing impaired to make the sound reach the auditory pathway of the brain and feel the sound. It mainly consists of five parts: microphone, power amplifier, earphone, power supply and volume control. Hearing AIDS are divided into air conduction hearing AIDS and bone conduction hearing AIDS according to conduction modes; According to the mode of use, it is divided into box type, glasses type, hairpin type, behind-the-ear type, in-ear type, ear canal type and deep ear canal type. Figure 2. Hearing AIDS with Different Uses Since electronic hearing AIDS were put into use in the early 20th century, the structure of hearing AIDS has not changed much, and they are still composed of microphone, amplifier, receiver and power supply. However, the volume of each part of the hearing aid is gradually shrinking, the sound quality is improving day by day, and the selective control is more. 1) Microphone: collects sound and converts it into radio waves. 2) Amplifier: Increase the intensity of radio waves. 3) Receiver: Facing the microphone, it converts the increased electric energy back into sound waves. 4) Power supply: small battery. 5) Shell: protect the internal structure. Figure 3. Structure diagram of ear-hanging hearing aid (illustration: 1. Headphones, 2. Receiver, 3. Microphone, 4. Volume adjustment button, 5. Trimming potentiometer, 6. Amplifier, 7. Switch, 8. Battery holder) Figure 4. Structure diagram of in-ear hearing aid (illustration: 1. Volume adjustment is actually a small semiconductor speaker, which can amplify weak sound and transmit it to headphones, so that the hearing-impaired part can hear the sound with the help of amplification. At present, there are the following kinds, but their functions and principles are the same. (1) From the external structure, it can be divided into box type, behind-the-ear type and in-ear type, and in-ear type can be divided into ordinary in-ear type, ear canal type and deep ear canal type. (2) According to the electronic principle, it can be divided into: analog hearing aid; Programmable hearing aid, all-digital hearing aid, wide dynamic language technology hearing aid, etc. (3) Hearing AIDS are divided into air conduction hearing AIDS and bone conduction hearing AIDS according to conduction modes. Box-type, behind-the-ear type and in-the-ear type all belong to air conduction hearing AIDS. Figure 5. The appearance of several hearing aids. Box hearing AIDS are also called wearable or pocket hearing AIDS. A rectangular box shaped like a small radio. The microphone, amplifier and battery of the hearing aid are all assembled inside, and the earphone and earplug or special ear mold are connected with a long wire outside. Usually put in clothes pockets or special bags. This kind of hearing aid has a large volume and is suitable for the elderly and people with limited finger movement. The microphone (microphone) of the hearing aid is far away from the receiver (earphone), so it is not easy to produce acoustic feedback, so the maximum output limit is very small, the power can be made very large, and multiple manual adjustment knobs can be placed. Low price and convenient maintenance. You can use No.5 or No.7 batteries, and you can also use rechargeable batteries. Body-worn hearing AIDS can also be made into binaural hearing AIDS, which are bulky and have poor concealment. Hearing AIDS use common transistor elements and have high background noise. In addition, the friction between the hearing aid itself and wires and clothes makes the sound easily distorted and reduces the sound quality. At the same time, the earphone cable is easy to be damaged and it is not safe for children to wear. In-ear hearing aid is a kind of miniature hearing aid, and the shell is customized according to the patient's ear sample. The amplifier, transmitter and receiver are all placed in a customized housing, which can be placed in the concha cavity. There is no need for wires or hoses outside, which is more concealed and light. At present, there are in-ear hearing AIDS with medium power, medium power and high power, which need to be customized according to the individual concha cavity, so the price is higher. Generally, young people have more choices. For patients who are prone to sweating in the head, wearing behind-the-ear hearing AIDS is easy to be damaged by moisture. In-ear hearing AIDS can be considered. Deaf children in the growing period are not suitable for wearing because their auricles are also developing. Deep ear canal hearing aid is the smallest and most concealed hearing aid at present. According to the user's ear canal, the sound reinforcement performance is closer to that of normal people. Put it deep in the ear canal, the appearance is almost invisible, which greatly meets the user's requirements for their own appearance and image. In addition to the advantages of general ear canal hearing AIDS, more importantly, deep ear canal hearing AIDS can make full use of the self-improvement function of human ear canal structure, especially the high-frequency part, so that the hearing feeling is clearer and more natural. Because the sound output port of the hearing aid is close to the eardrum, the sound output by the hearing aid can reach the eardrum immediately, so that the output gain and waveform are not attenuated, and sufficient sound energy and sound quality fidelity are ensured. The scope of application is narrow, only suitable for people with mild or moderate deafness, and the hearing loss is best within 65 decibels. The child's ear canal is not mature enough to wear. The behind-the-ear hearing aid is suitable for all kinds of hearing loss and is widely used at present. The transmitter, power amplifier, battery, volume adjustment and receiver are all packed in a small box with a long hook shape, which is slim in appearance. A hard plastic ear hook bent into a semicircle is hung behind the ear, and the shell can be covered with the color of skin or hair. The amplified sound is introduced into the sound hole of the ear mold through the ear hook and the plastic pipe. It is divided into different types, such as low power, medium power and high power, with high power, low noise, small distortion and convenient wearing. The disadvantage is that the hearing aid will get damp due to the user's sweating, which will accelerate the aging of components. Ear canal hearing aid is suitable for patients with mild, moderate and severe deafness, and it is a high-precision personal hearing aid. The hearing aid shell is specially designed and manufactured according to the patient's ear shape, and it is very tight to wear, ensuring the sound tightness and wearing comfort when using; Ear-canal hearing AIDS are smaller than in-ear hearing AIDS and have no external wires, which can imitate the sound transmission process of human ears to the maximum extent. Because the ear canal hearing aid is placed in the ear canal, it is hidden to wear and is not easy to be noticed, which meets the image requirements of users for wearing the hearing aid itself. Children's ear canal is not mature enough to wear; Patients with ear canal malformation, stenosis and ulcer should not wear it. Under normal circumstances, we listen to sound in at least two ways: bone conduction and air conduction. The so-called bone conduction mode is that the sound signal vibrates the skull and directly reaches the inner ear without passing through the outer ear and the middle ear; Air conduction mode means that sound is transmitted to the inner ear through the outer ear and the middle ear. Of the two ways, the latter has an absolute advantage. Usually, what we call box-type, behind-the-ear type, in-ear type and so on are all air-conduction hearing AIDS. The air conduction hearing aid transmits the amplified sound signal to the external auditory canal. Bone conduction hearing AIDS are different. Strictly speaking, bone conduction hearing AIDS ultimately produce not sound signals, but vibration signals. There is no so-called "earphone" or earplug in bone conduction hearing aid, but a vibrator that can generate vibration signals. When the vibrator is pressed against the mastoid bone protruding behind the ear, the vibration of the vibrator will cause the skull to vibrate, and the signal will be directly transmitted to the inner ear through the outer ear and the middle ear, which is the advantage of the bone conduction hearing aid. Because of this advantage, in theory, bone conduction hearing AIDS are especially suitable for patients with conductive deafness (that is, patients with external ear and middle ear problems). However, this is not the case, and bone conduction hearing AIDS are far from being as effective as imagined. The reasons are as follows: first, the bone conduction hearing mode is far less effective than the air conduction hearing mode; Secondly, the vibrator, the output device of bone conduction hearing aid, is not only very unsightly, but also very uncomfortable and difficult to be accepted by users. Generally speaking, as long as you can use an air-conduction hearing aid, you should first choose an air-conduction hearing aid. Patients with abnormal external auditory canal or recurrent pus after external and middle ear infection should not wear earplugs, ear molds or in-ear hearing AIDS. You can consider using bone conduction hearing AIDS. At present, there are several types of hearing AIDS on the market: box type, behind-the-ear type, in-ear type and ear canal type. 1) box-type hearing AIDS are also called pocket-type or pocket-type, which are slightly larger than matchboxes. The body and earphone are connected by wires. When in use, the earphone is inserted into the external auditory canal, and the box is placed in the chest pocket. Its advantages are less interference, higher power, convenient use, easy adjustment, long use time and lower price, which can meet the needs of severely deaf people. But this kind of hearing aid box will produce friction sound in your pocket, which will affect language discrimination. It's conspicuous to wear, so sometimes it's inconvenient. 2) The shape of the behind-the-ear hearing aid is 3-4 cm long, which is placed behind the auricle and sends sound into the ear canal through claw-shaped ear hooks and plastic pipes. Its advantages are no wires, small size, strong concealment and little interference. It can also be equipped with an induction coil to increase the function of monitoring telephone calls. The disadvantage is that you need to prepare an ear mold specially. I am not used to it at first and it is not convenient to adjust it. 3) In-ear hearing AIDS and ear canal hearing AIDS belong to small hearing AIDS, which have the advantages of small size, strong concealment, no wires, no need for additional ear molds, good listening effect and improved hearing. But the adjustment is inconvenient and expensive, and it needs to be customized according to everyone's ear canal and concha cavity. Because of its low power, it is only suitable for moderate deafness, not for severe and extremely severe deafness. When choosing a hearing aid, it is best to go to a hospital, have a comprehensive examination of hearing, accurately evaluate the degree of deafness with instruments such as audiometry, and then choose a hearing aid. If there is no corresponding hospital in the local area, the degree of hearing loss and the choice of hearing aid power can be estimated according to the oral test. For example, people who can't hear whispers lose 30-40 decibels, and people who can't hear whispers lose about 40-50 decibels. At this time, you should buy low-power and medium-power hearing AIDS; The hearing loss of people who can't hear ordinary speech is about 50 ~ 60 decibels, and that of people who can't hear loud speech is 60 ~ 70 decibels. You can choose hearing AIDS with medium power and high power. People who can't hear shouting have a hearing loss of 70 ~ 80 decibels, so choose medium and high power hearing AIDS; The hearing loss of people who can't hear all the shouting is about 80 ~ 90 decibels, so high-power and super-power hearing AIDS can be used. Children's deafness is often divided into two situations: curable and incurable. Curable deafness, such as otitis media and cerumen embolism. It can only be improved by taking an anti-inflammatory needle or cleaning the ear canal. If the hearing aid is difficult to match, the sound amplified by the hearing aid will damage the child's hearing. Be sure to make a clear diagnosis before wearing a hearing aid. Because the child's expression ability is weak, it is not easy to cooperate with the examination, and the child's hearing sometimes fluctuates, so it is not easy to draw a conclusion after one examination. Parents should take their children for more examinations, and at least two related examinations should be done in regular hospitals before deciding whether to equip their children with hearing AIDS. When wearing a hearing aid, don't just think about beauty. I don't think it's good for children to wear bigger hearing AIDS. In fact, choosing an inappropriate hearing aid will affect children's hearing and pronunciation. After wearing hearing aid 1 ~ 2 months, you must go to the hospital for hearing test again so as to adjust it in time. After children wear hearing AIDS, there is a gradual adaptation process from a silent world to being able to hear sounds. Parents should insist on language training for their children, but don't rush for success. After training, the average child wears it for 3 to 4 months and begins to learn to speak. Ma Xiaoling, Liu Xun, Zhang Sixing. Investigation and development analysis of hearing AIDS in China [J]. Journal of Minzu University of China (Natural Science Edition), 2014,23 (1): 39-42 [2] Krishna Kumari, Shark Wang, Dong Ruijuan. Evaluation of tone recognition ability of cochlear implant users using tone information [J]. Journal of Clinical Otolaryngology Head and Neck Surgery [J]. Journal of Clinical Otolaryngology Head and Neck Surgery, 2014,28 (19):1-1464 [2014,46 (5): 56-. Research progress of artificial middle ear [J]. Progress of biomedical engineering, 2014,35 (1): 23-27 [5]
Vocabulary about hearing AIDS
Difid
Idioms about hearing AIDS
Save the Liao Dynasty, help the people, pull out the seedlings to encourage them, the country throws rats to avoid devices, loses money, listens to Feng Shui, gets much help, is ignorant and helpless, and can do a lot.
Vocabulary about hearing AIDS
The bucket device can help the country, it can give a big device. Late bloomer. Helping people save money and draw swords is very helpful.
Sentence-making about hearing AIDS
1, dealing with the quality problems related to hearing AIDS, boards and parts.
2. How to better play the role of hearing AIDS?
3. A particularly interesting application of transistors is in hearing AIDS.
4. However, hearing AIDS and pacemakers are allowed.
5. Older people with inflexible hands and feet and poor eyesight should choose hearing aid types that are easier to operate. People with narrow ear canal can choose a hearing aid behind the ear and add a vent hole to the ear mold.
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