UNLABELLED Children with childhood apraxia of speech (CAS) have been hypothesized to continuously monitor their speech through auditory feedback to minimize speech errors. We used an auditory masking paradigm to determine the effect of attenuating auditory feedback on speech in 30 children: 9 with CAS, 10 with speech delay, and 11 with typical development. The masking only affected the speech o...

Acoustic source localization system for speech signals based on five microphone array was developed. Three dimensional position computation is based on time delay estimation between pairs of microphones. The psyhoacoustically motivated voice activity detector was used to robustly determine activity of speaker in presence of background noise. The detector was based on modulation properties of hu...

Current speech recognition systems use mainly amplitude spectrum-based features such as MFFC for acoustic feature parameters, while discarding phase spectral information. The results of perceptual experiments, however, suggested that phase spectral information based on long-term analysis includes certain linguistic information. In this paper, we propose the use of phase features based on long-t...

BACKGROUND This report is an update of the US Preventive Services Task Force (USPSTF) 2006 recommendation on screening for speech and language delay in preschool-aged children. METHODS The USPSTF reviewed the evidence on screening for speech and language delay and disorders in children aged 5 years or younger, including the accuracy of screening in primary care settings, the role of surveilla...

Speakers with defective velopharyngeal mechanism, produce speech with inappropriate nasal resonances across vowel sounds. The acoustic analysis on hypernasal speech and nasalized vowels of normal speech shows that there is an additional frequency introduced in the low frequency region close to the first formant frequency [1]. The conventional formant extraction techniques may fail to resolve cl...

Absrruct-This paper studies a speech coder using a tree code generated by a stochastic innovations tree and backward adaptive synthesis filters. The synthesis configuration uses a cascade of two all-pole filters: a pitch (long time delay) filter followed by a formant (short time delay) filter. Both filters are updated using backward adaptation. The formant predictor is updated using an adaptive...

Interactions between phonology and syntax are inspected in continuous speech samples from 30 speech-delayed children. Two types of interactions are examined: The co-occurrence of speech and language delay and the effects of phonological reduction on the realization of phonetically complex morphophonemes. Four possible patterns of association between the phonological and syntactic systems are ou...

A new robust blind microphone array method to enhance speech signals generated by multiple moving sources in a noisy environment is presented. This approach is based on a two-stage scheme. A subband clustering time-delay estimation algorithm is first used to localize the dominant speech sources. The speech enhancement is performed in a second stage, based on the acquired spatial information, by...

Background: Developmental delay is one of the most common problems of children referred to pediatric neurology clinics. While there are reports on rehabilitation and its effects, limited studies are available to delineate pharmacotherapy of such children. Because many children with developmental delay have abnormal findings in electroencephalography, we aimed to treat a group of these children,...

Process of identifying the end points of the acoustic units of the speech signal is called speech segmentation. Speech recognition systems can be designed using sub-word unit like phoneme. A Phoneme is the smallest unit of the language. It is context dependent and tedious to find the boundary. Automated phoneme segmentation is carried in researches using Short term Energy, Convex hull, Formant,...