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Language-specific phoneme representations revealed by electric and magnetic brain responses
It is found that the brain's automatic change-detection response, reflected electrically as the mismatch negativity (MMN) was enhanced when the infrequent, deviant stimulus was a prototype relative to when it was a non-prototype (the Estonian /õ/).
Glottal wave analysis with Pitch Synchronous Iterative Adaptive Inverse Filtering
- P. Alku
- Mathematics, Computer ScienceSpeech Commun.
- 1 June 1992
The results show that the PSIAIF-algorithm is able to give a fairly accurate estimate for the glottal flow excluding the analysis of vowels with a low first formant that are produced with a pressed phonation type.
Normalized amplitude quotient for parametrization of the glottal flow.
- P. Alku, Tomas Bäckström, E. Vilkman
- Mathematics, MedicineThe Journal of the Acoustical Society of America
- 31 July 2002
Comparison between NAQ and its counterpart among the conventional time-domain parameters, the closing quotient, shows that the proposed parameter is more robust against distortion such as measurement noise that make the extraction of conventionalTime-based parameters of the glottal flow problematic.
Speech–sound-selective auditory impairment in children with autism: They can perceive but do not attend
- R. Čeponienė, T. Lepistö, +4 authors K. Yaguchi
- Psychology, MedicineProceedings of the National Academy of Sciences…
- 17 April 2003
The results demonstrate that, first, auditory orienting deficits in autism cannot be explained by sensory deficits and, second, that orienting deficit in autism might be speech–sound specific.
The discrimination of and orienting to speech and non-speech sounds in children with autism
- T. Lepistö, T. Kujala, R. Vanhala, P. Alku, M. Huotilainen, R. Näätänen
- Psychology, MedicineBrain Research
- 20 December 2005
The present study aimed to find out how different stages of cortical auditory processing (sound encoding, discrimination, and orienting) are affected in children with autism. To this end, auditory…
Memory Traces for Words as Revealed by the Mismatch Negativity
- F. Pulvermüller, T. Kujala, +7 authors R. Näätänen
- Computer Science, PsychologyNeuroImage
- 1 September 2001
These results provide the first demonstration of the presence of memory traces for individual spoken words in the human brain, using whole-head magnetoencephalography.
Brain responses reveal the learning of foreign language phonemes.
The present study demonstrates the dynamic nature of cortical memory representations for phonemes in adults by using the mismatch negativity (MMN) event-related potential to study Hungarian and Finnish subjects and finds that the MMN for a contrast between two Finnish phoneme was elicited in the fluent Hungarians but not in the naive Hungarians.
Event-related potentials associated with sound discrimination versus novelty detection in children.
- R. Čeponienė, T. Lepistö, M. Soininen, E. Aronen, P. Alku, R. Näätänen
- Psychology, MedicinePsychophysiology
The findings suggested that LDN is not linked with either the sensory or attentional processing, and might reflect cognitive, albeit preattentive, processing of sound change.
Spatial processing in human auditory cortex: the effects of 3D, ITD, and ILD stimulation techniques.
- K. Palomäki, H. Tiitinen, V. Mäkinen, P. May, P. Alku
- Psychology, MedicineBrain research. Cognitive brain research
- 1 August 2005
The activity taking place already in the auditory cortex predicts behavioral sound detection of spatial stimuli, and the amount of spatial cues embedded in the signal are reflected in the activity of this brain area.
Glottal inverse filtering analysis of human voice production — A review of estimation and parameterization methods of the glottal excitation and their applications
- P. Alku
- Computer Science
- 22 November 2011
An era spanning five decades during which this topic has been under development is examined, including the estimation methods of the glottal source, the parameterization techniques that have been developed to express the estimatedglottal excitations in numerical forms, and the application areas of GIF.