mean fundamental frequency

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deji 2011-11-13

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回答： Greg Dionne 2016-11-17

hi, how can i estimate the mean fundamental frequency of a vowel sound with a known sampling frequency. thanks in advance

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Naz 2011-11-13

Are there any assumptions in relation to sampling rate and the frequency content of the sound? The frequency distribution or the envelope of the frequency spectrum?

deji 2011-11-14

the only things that i got from the sound are the 3formant frequencies, the lpc coefficients of of period nd some figures, but i avnt seen anything that links to the fundamental frequency

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Answer 1

Walter Roberson 2011-11-14

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When you know the number of samples and the sampling frequency, then you can assign a frequency to each fft bin. Pick out the fft bin that has the largest absolute magnitude, convert bin number to frequency, and you have a start at the problem.

But only a start, because the largest absolute value does not necessarily occur at the zero'th harmonic of the fundamental. You can do searches like looking to see if there is non-trivial energy one octave down, but there can be cases where the fundamental frequency is absent even though harmonics are present.