Four-band and single-band noise-excited vocoders were used in acoustic simulations to investigate spectral and temporal cues to melodic pitch in the output of a cochlear implant speech processor. Noise carriers were modulated by amplitude envelopes extracted by half-wave rectification and low-pass filtering at 32 or 400 Hz. The four-band, but not the single-band processors, may preserve spectra...

Problem statement: The fundamental frequency (F0) of the human speech corresponds to the vibration frequency of the human vocal chords. To extract the F0 from a speech utterance, one approach is based on the Cepstral analysis. In Thai, there are four main dialects spoken by Thai people residing in four core region including central, north, northeast and south regions. Environmental noises are a...

Infant-directed speech is an important but difficult-to-measure aspect of caregiver-infant interaction. Specialized training in speech science is required and processing is computationally intensive and time consuming. We developed a computer-assisted method of measuring infant-directed speech that requires little specialized training, has high concurrent validity with alternative approaches, a...

As is known, the fundamental frequencies (F0) of vowels following aspirated or lenis stops have become associated with aspirated~lenis stop contrast while Voice Onset Time (VOT) values them became merged in Seoul Korean. Previous studies found effects age, gender, lexical frequency, and vowel height. However, although competition has been demonstrated to affect trajectory sound change regarding...

The acoustic features of vocalizations have the potential to transmit information about the size of callers. Most acoustic studies have focused on intraspecific perceptual abilities, but here, the ability of humans to use growls to assess the size of adult domestic dogs was tested. In a first experiment, the formants of growls were shifted to create playback stimuli with different formant dispe...

Frequency compression is an effective alternative to conventional hearing aids amplification for patients with severe-to-profound middleand high-frequency hearing loss and with some low-frequency residual hearing. In order to develop novel frequency compression strategy, it is important to first understand the mechanism for recognizing low-pass filtered speech, which simulates high-frequency he...

The automated analysis of vibrato in complex music signals is a highly challenging task. A common strategy is to proceed in a two-step fashion. First, a fundamental frequency (F0) trajectory for the musical voice that is likely to exhibit vibrato is estimated. In a second step, the trajectory is then analyzed with respect to periodic frequency modulations. As a major drawback, however, such a m...

This paper presents an enhancement system for early stage Spanish Esophageal Speech (ES) vowels. The system decomposes the input ES into neoglottal waveform and vocal tract filter components using Iterative Adaptive Inverse Filtering (IAIF). The neoglottal waveform is further decomposed into fundamental frequency F0, Harmonic to Noise Ratio (HNR), and neoglottal source spectrum. The enhanced ne...

We present psychophysical data on fast auditory periodicity detection in the millisecond range (temporal pitch) that rule out a simple first-order inter-spike interval model. We then present a neural sequence learner that examines fast spike patterns as they are supposed to occur with periodic auditory signals and measures the degree of their regularity. The output of the neural net is evaluate...

This study explored the effects on speech intelligibility of across-formant differences in fundamental frequency (ΔF0) and F0 contour. Sentence-length speech analogues were presented dichotically (left = F1+F3; right = F2), either alone or-because competition usually reveals grouping cues most clearly-accompanied in the left ear by a competitor for F2 (F2C) that listeners must reject to optimiz...