It is hard to make a hat that fits all heads. If one were made, most people would find it uncomfortable. This fact could be the realistic of the web sites design. Web developers face the same issue creating web pages for more general usage. For those deaf and hearing-impaired people, some special technologies should be applied to ease their web browsing and searching. This report will focus on such disabled characteristics.
Deaf persons are not a monolithic group. Persons born deaf or who become deaf before learning the language of their environment (prelingual deafness) have a significant educational challenge as well as a communication challenge. Other deaf persons have a communication challenge. Deaf persons may be divided into five categories. For the purposes of this paper the categories are prelingual deafness, prelingual hard-of-hearing, postlingual deafness, postlingual hard-of-hearing, and presbyacusis. (oldage deafness) Each of these categories are discussed in detail including the characteristics of persons within the categories, and the nature of the problems they encounter.