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Biomedical subjects

S Peeters

Publications and source records attributed to S Peeters.

29 records · Page 2Linked to original sources
PubMed1986

Acoustic simulation experiments with preprocessed speech for an 8-channel cochlear implant.

A speech processor for simulation of preprocessed speech in cochlear implantation has been developed. An acoustic simulation of spectrally reduced speech was presented to 169 normally hearing subjects. Several perceptual tests with 9 different filter conditions were carried out. The intelligibility of sentences and the discrimination of phonemes in nonsense syllables were measured. It was established that even within one test session, an important learning effect occurred.

Cochlear Implants↗
PubMed1985

Information transmission with an eight channel bipolar cochlear implant. Acoustic simulation experiments.

In order to find the best stimulus parameters for the processing of a speech signal for cochlear implant applications, a speech processor was developed. The information which can be transmitted by means of an eight channel implant is simulated. The results indicate that identification and forced choice discrimination of (CV) and (VC) syllables is possible. The perception of consonants is more affected than that of vowels. Within one test session an effect of learning was established which remained restricted to the trained filter condition.

Acoustics↗
PubMed1985

The UIA-KUL cochlear implant. Goals and status praesens.

The authors describe the characteristics and specific advantages of their 8 channel bipolar intrascalar stimulator, its main asset being flexibility. They emphasize the need for caution in the use of cochlear implants in children.

Adult↗
PubMed1983

Ultrasonography of liver haemangioma. A report of 35 patients totalizing 53 lesions.

During the last two years a total of 53 liver angiomas in 35 patients were examined by sonography. The angiomatous nature of these lesions was proven by angiography, CT, laparotomy, laparoscopy or autopsy. In this material the most striking sonographic data are the reflective character of the angiomas (94%), the subcapsular location (70%), the small size under 2 cm. (32%) and the multiplicity (35%). 90% of the lesions larger than 3 cm. tend to display polylobular contours.

Adult↗
PubMed1980

Distortion products f1 + fh and 2f1 + fh in the inner ear.

The ear introduces spectral components which are not present in the stimulating sound. These components are commonly attributed to nonlinearities in the inner ear. In this paper it is shown that the sum product of f1 + fh and cubic sum product 2f1 + fh, perceptively measured, do behave as predicte d by the conventional distortion theory of a power series nonlinearity and that they are most likely masked by the d.c. component generated by the same nonlinearity. We present a model in an attempt to explain the data.

Ear, Inner↗
PubMedDate not supplied

Myocardial infarction in a neonate with hereditary antithrombin III deficiency.

We report the case of a newborn girl with antithrombin III deficiency type 1. The clinical features of a hypercoagulable condition that lead to this rare diagnosis differed from the reports in the literature, since the primary thromboembolic incident resulted in neonatal myocardial infarction, which is in itself a rare condition during the first days of life.

Antithrombin III Deficiency↗
PubMedDate not supplied

A multi-channel simultaneous data acquisition and waveform generator system designed for medical applications.

To meet the needs of our research programmes on auditory prostheses for the totally deaf, a 15-channel data acquisition and waveform generator system with flexible triggering, pacing and linking was developed. It allows both synchronous and asynchronous operation at high speed. Each channel of the system, which is controlled by a simple personal computer, has an on-board microcontroller, a 512 kWord signal memory, a voltage input and both voltage and current outputs. The system includes a master pacer and trigger unit with elaborate hardware and software triggering options. This paper describes the system hardware and the software used to control it. Finally, some of its application are demonstrated. The flexibility of the system makes it widely applicable in the field of biomedical engineering.

Animals↗