A model of auditory scene analysis is proposed, which incorporates an attentional mechanism and is implemented using a network of neural oscillators. The core of the model is a two-layer neural oscillator network which performs stream segregation and selection on the basis of oscillatory correlation. A stream is represented by a sychronised oscillator population, whereas different streams are r...

An auditory model was developed to explain the results of behavioral experiments on perception of speaker size with voiced speech sounds. It is based on the dynamic, compressive gammachirp (dcGC) filterbank and a weighting function (SSI weight) derived from a theory of size-shape segregation in the auditory system. Voiced words with and without highfrequency emphasis (+6 dB/octave) were produce...

Are speech-specific processes localized in dedicated cortical regions or do they emerge from developmental plasticity in the connections among non-dedicated regions? Here we claim that all the brain regions activated by the processing of auditory speech can be re-classified according to whether they respond to non-verbal environmental sounds, pitch changes, unfamiliar melodies, or conceptual pr...

An analysis of 50 chorale harmonizations by J.S. Bach shows that the use of embellishment tones is consistent with several principles known to contribute to the perceptual segregation of auditory streams. The results imply that a major role of embellishment tones may be to enhance the perceptual independence of the individual parts or voices. In addition, it is shown that Bach tends to distribu...

A principal problem of auditory scene analysis is stream segregation: decomposing an input acoustic signal into signals of individual sound sources included in the input. While existing signal processing algorithms cannot properly solve this inverse problem, a multi-agent-based architecture has been considered to be a promising methodology in its modularity and scalability. However, most attemp...

When human subjects hear a sequence of two alternating pure tones, they often perceive it in one of two ways: as one integrated sequence (a single "stream" consisting of the two tones), or as two segregated sequences, one sequence of low tones perceived separately from another sequence of high tones (two "streams"). Perception of this stimulus is thus bistable. Moreover, subjects report on-goin...

Title of Document: Auditory streaming: behavior, physiology, and modeling Ling Ma, Doctor of Philosophy, 2011 Directed By: Professor Shihab A. Shamma, Department of Electrical and computer Engineering, Institute of Systems Research Auditory streaming is a fundamental aspect of auditory perception. It refers to the ability to parse mixed acoustic events into meaningful streams where each stream ...

Cortico-basal ganglia circuits are organized in parallel channels. Information flow from functionally distinct cortical areas remains segregated within the striatum and through its direct projections to basal ganglia output structures. Whether such a segregation is maintained in trans-subthalamic circuits is still questioned. The effects of electrical stimulation of prefrontal, motor, and audit...

A fundamental problem faced by the auditory system of humans and other vertebrates is the segregation of concurrent vocal signals. To discriminate between individual vocalizations, the auditory system must extract information about each signal from the single temporal waveform that results from the summation of the simultaneous acoustic signals. Here, we present the first report of midbrain cod...

Direct social contact and social interaction affect speech development in human infants and are required in order to maintain perceptual abilities; however the processes involved are still poorly known. In the present study, we tested the hypothesis that social segregation during development would prevent the proper development of a central auditory area, using a "classical" animal model of voc...