Software as a service (SAAS) services featuring software for recognizing potentially dangerous sounds; software for communicating with users of hand-held computers, namely, text-to-speech and speech-to-text conversion and recognition of human speech; software for allowing hearing-impaired people to be able to feel music tempo and rhythm without hearing music sounds; and software enhancing and improving social life aspects and life activities of the deaf and hard of hearing, namely, in the field of public services, health services, employment, education, entertainment, public accommodations, and services offered by private entities. Computer software development for deaf and hard of hearing people