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    الثلاثاء، 13 سبتمبر 2016

    Types And Models Of Hearing Aids

    By Brenda Murphy


    Deaf aid is another name used for hearing aid. These are devices used by deaf people for improving hearing ability. In many countries, they fall under mechanical devices and are subject to regulation as such. Hearing aids have evolved with time from being simple sound amplifying gadgets to devices of artificial intelligence that are simply computerized electroacoustic systems.

    Modern devices make sounds more comfortable and intelligible because they are computerized electroacoustic systems. They have sound processing abilities that allow them to cancel noise and wind, highlight voice, highlight spatial region, and shift frequencies. Configuration needs to be done to the gadget so as to match with the extent of loss of the ability to hear, physical features, and lifestyle of the user.

    The term fitting is used to refer to the process by which an aid is configured so that it can match various aspects. The fitting is done by a specialist called an audiologist. The level of usefulness of a device is often dependent on the quality of fitting the audiologist does on it. It worth knowing that, deafness is not truly corrected by a deaf aid. All the device does is to increases the accessibility of sound.

    The level of efficiency of these gadgets in undermined by two key factors. The first factor is related to loss of cells of the brain responsible for sound processing. The loss of these cells is triggered by prolonged absence of stimulation to primary auditory cortex. As the degree of deafness rises in an individual so does the loss in these brain cells. Factor number two is related to the damage of hair cells in inner ear due to sensorineural hearing loss. The patient becomes incapable of discriminating sounds as the hair cells are continuously lost.

    Evaluation of how effective a gadget is in compensating for hearing loss is done using various methods. Among the evaluation methods currently in use is audiometry. This evaluation is undertaken under laboratory conditions to measure the level of hearing in a person. The method tries to mimic the conditions in a real world to the highest degree. However, regardless of the mimicry, patient experience is still very different.

    The outcome of a gadget can be represented using three major dimensions. These dimensions include aided speech recognition, satisfaction, and hearing aid usage. Real ear measurement is one of the techniques used for measuring the correctness of adjustments a gadget makes in hearing. Silicone probe tube microphones are utilized in this technique to assess amplification characteristics device performs near the eardrum.

    Various kinds of these gadgets are available on the market today. Various aspects of the various models vary, including circuitry, power, and size. Some common contemporary types include receiver in the canal aid, behind the ear aid, body worn aid, on-the-ear aid, and BTE cross system. Others are earmolds, open-fit gadgets, disosable deaf aid, BTE Bi cross system, stethoscope deaf aids, bone anchored gadgets, extended wear gadgets, and invisible in canal deaf aid.

    Button cell zinc-air batteries are the most commonly used battering in modern devices. There are five major standards of these batteries. Mercury batteries were common in older models of the device. Other manufacturers of modern devices also use long-life disposable or rechargeable batteries.




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