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As analysis performed on a proposed special purpose hearing aid yields data on single-sidebanded voice zero-crossing rates extracted by a phase-locked loop (PLL), and also data on the logarithmically compressed voltage analog of the zero-crossing rate. The PLL demodulation is shown to correspond well with first and second formats of the eight vowels analyzed. Three fricatives were also investigated.
Acoustics, Speech and Signal Processing, IEEE Transactions on (Volume:23 , Issue: 5 )
Date of Publication: Oct 1975