General question on Speech Processing

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jpolihro

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Dear All,

I am a newbie to speech analysis and thought someone could help:

There is a vibrating source, which vibrates with frequency f = f(t); f(t) is an unknown function. As an example, the vibrating source produces a sound which resembles the phrase "LLEEEEE".
I need to extract data points for f(t) from this and other speech-like sounds.

I am not sure where to start. The above phrase may be pronounced with high or low pitch (voice). Therefore the only thing that does not change is the phrase itself (in the above example, "LEEEE").
Whould someone have an idea of where I should look?


Appreciate the help.
 

Hi,

If my understanding of the question is correct, all you need is estimation of
pitch(fundemental frequency) at various points in time.

You could just type "pitch estimation of voiced speech" in google and find
loads of literature. Two simple methods are autocorrelation method and
AMDF method.
 

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