In previous studies of formant frequency discrimination, variation in the stimuli has mainly concerned the formant frequencies while other factors which may affect formant frequency discrimination have largely been ignored. In most studies, fundamental frequencies typical of adult male speakers have been used. In the study presented here, formant frequency discrimination as a function of fundam...

Human listeners are better able to identify two simultaneous vowels if the fundamental frequencies of the vowels are different. A computational model is presented which, for the first time, is able to simulate this phenomenon at least qualitatively. The first stage of the model is based upon a bank of bandpass filters and inner hair-cell simulators that simulate approximately the most relevant ...

The question of vowel intelligibility as a function of F0 is still a matter of debate. Above all concerning vowel sounds produced at F0s exceeding vowel related statistical F1 in citation-form words (‘oversinging’ F1), it is unclear whether vowel category perception inevitably shifts towards the neighboring category with a higher F1 or can be maintained in such cases. In this study, we tested l...

This paper proposes a noise-tolerant method for fundamental frequency (F0) extraction. This method includes several new ideas, including the estimation of the instantaneous frequencies of the higher harmonic components, and the design of an adaptive weighting function based on a bandwidth equation that combines the F0 information in the harmonic components. To evaluate the proposed method, we c...

This paper presents a high time-resolution strategy to estimate multiple fundamental frequencies in musical signals. The signal is first divided into overlapping blocks, and a high-resolution estimate made of the short-term spectrum. The resulting spectrum is modified such that only the most relevant spectral components are considered, and an iterative algorithm based on earlier work by Klapuri...

The set of possible postselection genotype frequencies in an infinite, randomly mating population is found. Geometric mean heterozygote frequency divided by geometric mean homozygote frequency equals two times the geometric mean heterozygote fitness divided by geometric mean homozygote fitness. The ratio of genotype frequencies provides a measure of genetic variation that is independent of alle...

A quadratic discriminant classification technique was used to classify spectral measurements from vowels spoken by men, women, and children. The parameters used to train the discriminant classifier consisted of various combinations of fundamental frequency and the three lowest formant frequencies. Several nonlinear auditory transforms were evaluated. Unlike previous studies using a linear discr...