supported by the National Natural Science Foundation of China(Nos.60825203,60973056,60973057,U0935004);National Technology Support Project(2007BAH13B01);Beijing Municipal Natural Science Foundation(4102009);Scientific Research Common Program of Beijing Municipal Commission of Education(KM200710005023);PHR(IHLB)
Among the human users of the Internet of Things,the hearing-impaired is a special group of people for whom normal information expression forms,such as voice and video are unaccessible,and most of them have some diffic...