The earliest forms of hearing aids were merely funnel-shaped Sonus Complete Review "trumpets" guiding the sound into the ear. While this "funneling" of sound to the ear may have been helpful to those with milder losses, for the most part, many were not likely helped by these "aids". The 1900s introduced the analog electronic hearing aid. For the greater part, these aids were merely amplifiers, increasing the volume of all sounds in the environment fairly equally.
Beginning as very large hand held and body worn aids, over time advances were made in size reduction and in programmable features. The 1990s brought about the introduction of completely digital hearing instruments. With digital processing, sound could be sorted out into smaller bits of information, allowing for easy manipulation. This greater capability to control the output of the sound allowed for very specific hearing customization. While analog aids are still available, they are slowly being phased out for more advanced digital products.
Many people, whether they're now in a position where they need a hearing aid or just want to know how they can protect their ears, are curious to know the factors that cause auditory loss. The causes are wide ranging, as are the treatments. Once it has occurred, of course, the individual afflicted is usually more interested in how they can cope, treat, or cure their condition than they are in how they wound up with it in the first place. While this is natural, it is instructive to know some of the ways in which people wind up with moderate to severe auditory loss or even deafness.