Assistive technology for navigation has exploded on the IEEE Xplore database since 2000, with over 7,500 engineering articles written on assistive technologies and visual impairment in the past 25 years, and over 1,300 articles on solving the problem of navigation for people who are blind or visually impaired.
ɐsˈɪstɪv tɛknˈɑːlədʒi fɔːɹ nˌævɪɡˈeɪʃən hɐz ɛksplˈoʊdᵻd ɔnðɪ ˌaɪˌiːˌiːˈiː ˈɛksplˈoːɹ dˈeɪɾəbˌeɪs sˈɪns tˈuː θˈaʊzənd, wɪð ˌoʊvɚ sˈɛvən,fˈaɪvhˈʌndɹɪd ˌɛndʒɪnˈɪɹɪŋ ˈɑːɹɾɪkəlz ɹˈɪʔn̩ ˌɔn ɐsˈɪstɪv tɛknˈɑːlədʒiz ænd vˈɪʒuːəl ɪmpˈɛɹmənt ɪnðə pˈæst twˈɛnti fˈaɪv jˈɪɹz, ænd ˌoʊvɚ wˈʌn,θɹˈiːhˈʌndɹɪd ˈɑːɹɾɪkəlz ˌɔn sˈɑːlvɪŋ ðə pɹˈɑːbləm ʌv nˌævɪɡˈeɪʃən fɔːɹ pˈiːpəl hˌuː ɑːɹ blˈaɪnd ɔːɹ vˈɪʒuːəli ɪmpˈɛɹd.