Authors from Australia, Canada, the UK and the USA have contributed chapters, and among the topics they cover are: fundamentals of vibrotactile and electrotactile perception; signal processing strategies; tactile coding (including synthetic Tadoma); choice of subjects and subject training; evaluation of tactile aids and comparison with cochlear implants; and communication for the deaf-blind. The book should provide a useful reference for those who work with the profoundly deaf, students and others with interests in the perception of speech and environmental sound.