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The main topic of this article is to compare acoustic parameters of utterances from children with developmental dysphasia and healthy children in age 5–7 years. The goals of this article are establishing the voice and speech characteristics that show differences between children with developmental dysphasia on three levels of this disorder and healthy children. These parameters should be helpful in...
Sturge-Weber syndrome is a neurocutaneous disorder classically characterized by the presence of facial port-wine stain and ipsilateral leptomeningeal angiomatosis. It is often associated with refractory epilepsy which requires surgical treatment. We present a case of a patient who initially presented with partial seizures of temporo-occipital origin, ipsilateral to the pial angiomatosis. During the...
The focus of this paper is continuous non-invasive blood pressure monitoring. We used electrocardiography (ECG) and photoplethysmography (PPG) to compute pulse arrival time (PAT) between heart and finger. PAT was measured as the time difference between the R-peak of ECG and a characteristic point of PPG. We defined different characteristic points on PPG and compared their suitability for blood pressure...
This paper is focused on a parameter which could be used for automatic and objective assessment of dysfluent speech. The measurement is based on the analysis of read audio recordings of stutterers. The designed parameter analyzes the signal in the spectral domain, which correlates with the subjective assessment of two phoniatrics experts with a coefficient of −0.789. A Bayesian change-point detector...
This paper deals with an analysis of power spectra of prolonged Czech sibilants /s/, /sh/, /z/, /zh/. Several approaches based on an approximation of the power spectral density (PSD) in several frequency bands were used. The experiments performed used a linear and a quadratic approximation in the frequency bands 1–3 kHz and 3–6 kHz, a cubic approximation in the frequency band 1–6 kHz and the Bézier...
Powerline contamination of recorded signals represents a major source of noise in electrophysiology and impairs the use of recordings for research. In this article we present simple and effective method for cancelling 50Hz (or 60Hz) noise using a reference noise signal and average noise cycle subtraction. This method is capable of reliably removing not only the fundamental powerline frequency but...
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