  In this age of information technology, information access in a convenient
manner has gained importance. Since speech is a primary mode of communication
among human beings, it is natural for people to expect to be able to carry out
spoken dialogue with computer. Speech recognition system permits ordinary
people to speak to the computer to retrieve information. It is desirable to
have a human computer dialogue in local language. Hindi being the most widely
spoken Language in India is the natural primary human language candidate for
human machine interaction. There are five pairs of vowels in Hindi languages;
one member is longer than the other one. This paper describes an overview of
speech recognition system that includes how speech is produced and the
properties and characteristics of Hindi Phoneme.
