Hearing aidThe “good” and “bad” wearing effects are generally felt and subjectively evaluated by the hearing-impaired, but for a professional hearing aid fitting organization or professional hearing aid fitting professional, the “good” and “poor” of a hearing aid Scientific and objective evaluation and testing must be carried out.
The so-called hearing aid fitting is to provide the best possible Hearing aid Here, “good” is a multi-dimensional concept, including the improvement of language recognition rate, the expansion of the audibility of environmental sound, the quality of sound quality and the comfort of loudness, etc. In short, it refers to the success of hearing loss The level of coping with life, in which language discrimination is the most important for people with hearing loss.
To know whether a hearing aid improves the language discrimination ability of hearing-impaired persons, a series of tests must be conducted to determine whether the hearing aid best meets the following four conditions (the minimum goal of fitting):
1. Restore sufficient hearing sensitivity to allow the hearing-impaired person to hear the language and environmental sounds (the degree of hearing) that they cannot hear without a hearing aid;
2. Restore, maintain the comprehension and discernment of allegories, so that the special sounds in the language and daily environment can be clear enough (the degree of hearing clearly);
3. When the language and environmental sound are in a noisy environment, try to achieve the above goals as much as possible;
4. Maintain a high sound intensity, but cannot reach the discomfort threshold (uncomfortable, too loud) level.
Some adults or children with severe hearing loss cannot fully achieve the above goals, but the goals themselves represent corresponding clinical expectations. Professional fittings must be conducted to understand the impact of low-frequency, intermediate-frequency, and high-frequency amplification, and whether hearing aid frequency compensation needs to be adjusted Improvement and whether it is necessary to wear more suitable and advanced hearing aids, etc.
From this point of view, in order to obtain a “good” hearing aid, a hearing-impaired person must be professionally fitted with professional equipment and methods.
After being professionally fitted by professionals, those with moderate hearing loss can wear hearing aids as convenient and effective as wearing glasses; while those with moderate or higher hearing loss and deaf children must undergo a period of language training and rehabilitation before they can be like Wearing glasses is as easy and free as possible.