Sound Recognition OS

I was just travelling in the bus today evening and i decided i wanted to think something informative.. the very next i thought bout the presentation i had yesterday.. two people were making presentation and one had to sit and just press "Space Bar" for forwarding the slide show and the other was making presentation. What if the person who was making presentation say the word " Next " and slide moves on automatically.. and a clap to move back to previous slide.. yeah..i do understand the technical difficulties.. If u need to go back to slide one from twenty, u need to clap twenty times.. might sound stupid for the audience if i do that.. but anyways just imagine tht u pull back ur seat with hands folded at ur back and say any application name and it executes(notepad when u say 'notepad')
What i am is a fanatic who wants innovative ideas to be used up.. dont want my dreams to fade out like mid summer dream.. World has so many discoeries waiting to be harnessed and this is one .. already exisitng and all it needs is ppl to believe on that. All i offer is the idea of Sound Recognition Operating System..
I dont even know whether am reinventing this.. But sound Recognition Operating System will be the future.. Jus imagine u can cook and operate ur music station or ur computer from lower end to higher end in space.. U dont have to move limbs to make key strokes to notify computers.
Sound Recognition Operating System will have voice compilers to identify the voice and logins to interpret the login info and the commands possibly provided by User at the time of loading login Information.

So.. how can that be achieved.. By identifying the voice properties u can draw signatures for an Entity(User). The transceiver will check for voice signals with the expected signature for it to go functional. We can have Voice compilers that could generate sounds for different system commands as well learn to interpet new voices if we offer command based on rules. Though the technical obstacles are more, we can always believe on technology ..who believed that some day we could watch Tv or communicate across globe.