How does speech Recognition system work? Speech Recognition Online, also known as speech to text, this is the technology which identifies speech, and which allow voice to serve as the main interface between the human and the computer. This is the technology which is helpful for all the age groups as it is very convenient and can develop to advance learning in the future. Voice is one of the basic, efficient and common form of communication method for everyone to interact with each other. Today the speech technologies are very easily available for a very limited but interesting range of tasks. This technology allows machines to respond properly and dependably to human voices which provides a useful and valuable services. Because of this communicating with computer is faster rather than using a keyboard, so people are preferring such system. Communication between the human being is controlled by spoken language, hence it is natural for people to expect the same with computer. This can becomplete by developing voice recognition online system which helps the computer to translate the voicerequest andchangeinto text. It is the process of changing an acoustic signal by using a microphone to a set of words and the recorded data can be used as document preparation. It has a number of applications for the users with and without disabilities. Speech-to-text ishelpful for writers to boost their writing production. Even this system is helpful for learning foreign language, useful as voice activated products for the blindand many familiar mainstream technologies. We have all used voice response system in our daily lives, most of the times without even thinking about it such as phone menus and directories, dialling on our cell phones with voice activation, and integrated voice commands on Smartphones are kind of a few examples. Also, Medical and law professionals use this voice recognition on daily basis to dictate notes and to transcribe important information.Voice Over Narration can help businesses in manytypes, as with the help of voice narration telephone transactions and enquiries dealt with by automation and they can be received a much higher volume and the customer can still get a welcoming and a reliable interface. This also changed the way people handle their financial matters, as now they can just call the bank throughthe phone and can get their bank balance, check their balance or transfer money to another account and these all can be done within a few minutes and everything is automated. With the help of Professional Narrative in the business the number of customers which can be serviced over the telephone has been greatly increased, because of this there is no longer hold times and not leading to angry customers, and the operating costs also get reduced. In turn this can also help to increase profits for the company as they now have more time, and call centred staff, can easily focus on higher value or other revenue generating calls. It is not only helping in marketing or promotional campaign but also used to communicate the message in case of any disaster. So that, people will be informed about the same and hence it helps to save their lives and the loss of property too.