I'm creating an app (I'm a software developer) that for different sounds (interjections from the user) will do different things.
For example if the user says:
"Tiu", than it will do task A,
if it will say "Tou" than it will do task B.
In digital sound, what's the difference between sound (user interjection) "Tiu" and "Tou"?
I need a fast way to say when the user said "Tiu" and when it said "Tou", I don't want to use word/speech recognition because it is too slow for my needs.
I'm mainly interested in the theoretical part of digital sounds. E.g. how can I put in the "Tiu" and "Tou" the following sounds "Ti Tiau Tiuu Tiiiu Too Toou Taou", what are their common "features".
After reading the answers, I must confess that I'm new to speech recognition and any similar domain. I didn't new in what I'm getting myself with this app. But overall the research is fun because I love algorithms and math.
Where I am now?
Currently I am reading/researching/learning about CMUSphinx Open Source Toolkit For Speech Recognition http://cmusphinx.sourceforge.net/wiki/tutorial. I don't think that I will use this toolkit but it has a good explanation of the basis in Speech Recognition: Basics of Speech.
Also after reading the responses, I ended to the conclusion that a training phase might be quite helpful, anyway I'm investigating more on it.
Do you now any good reading material that might help me in gaining more knowledge in this particular domain?
Can the recording device help me in identifying "tou" and "tiu"? e.g. if the device supports different recording filters - like low frequency filters etc...?