Xiaochuan Niu

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In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Abstract Dysarthria is a speech motor disorder usually resulting in a substantive(More)
Dysarthria is a motor speech disorder that is often associated with irregular phonation (e.g. vocal fry) and amplitude, incoordination of articulators, and restricted movement of articulators, among other problems. The present study is part of a project on voice transformation systems for dysarthria, with the goal of producing intelligibility-enhanced(More)
This paper focuses on generation of expressive speech, specifically speech displaying vocal affect. Generating speech with vocal affect is important for diagnosis, research, and remedia-tion for children with autism and developmental language disorders. However, because vocal affect involves many acoustic factors working together in complex ways, it is(More)
It is desirable to monitor the status of the velopharyngeal port during speech. This paper reports on the design and usage of a nonin-vasive device that measures the static nasal airflow from the nose during speech. The signal can be recorded directly from a generic sound card. Neither does the usage of this device interfere with the articulatory process of(More)
Automatic detection of different oral-nasal configurations during speech is useful for understanding normal nasalization and assessing certain speech disorders. We propose an algorithm to extract nasalization features from dual-channel acoustic signals that are acquired by a simple two-microphone setup. The feature is based on a dual-channel acoustic model(More)
Accurate estimation of velar movements is useful for automatic speech recognition, speech enhancement, and diagnosis of certain speech disorders. This paper reports on initial results of a project on estimation of velar movements, for two-microphone setups where the microphones are differentially positioned to pick up nasal and oral speech output. Toward(More)
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