Speech Recognition can be defined as the independent, computer‐driven transcription of spoken language into readable text in real time. It is the capability of an electronic device to understand spoken words. Speech Recognition is a common type of “speech-to-text” or “dictation” software, such as Dragon Naturally Speaking, which outputs text as you speak. It is the ability of a machine or program to identify words and phrases in spoken language and convert them to a machine-readable format. It also included voice user interfaces such as voice dialing, call routing, domotic appliance control, search, simple data entry, preparation of structured documents, speech-to-text processing, and aircraft.