The calibration of a prototype occluded ear simulator designed for neonatal hearing assessment applications.

An innovative family of ear simulators has been conceived for the calibration and traceability of audiometric equipment. Each device within the family has been designed for a particular key age group, covering neonates through to adults. The age-specific ear simulators are intended to improve the quality of hearing assessment measurements for all test subject age groups, and will be proposed as the next generation of standardised ear simulators for audiometric applications.

Relative variance of the mean-squared pressure in multimode media: rehabilitating former approaches.

The commonly accepted model for the relative variance of transmission functions in room acoustics, derived by Weaver, aims at including the effects of correlation between eigenfrequencies. This model is based on an analytical expression of the relative variance derived by means of an approximated correlation function. The relevance of the approximation used for modeling such correlation is questioned here.

Salmonella peritonitis in a patient on automated peritoneal dialysis.

We describe the clinical course of a case of peritonitis caused by Salmonella sp. after an episode of intestinal salmonellosis, and a brief review of the literature is also done.

Dynamic behavior of the circular membrane of an electrostatic microphone: effect of holes in the backing electrode.

Today, several applications require using electrostatic microphones in environments and/or in frequency ranges, which are significantly different from those they were designed for. When low uncertainties on the behavior of acoustic fields, generated or measured by these transducers, are required, the displacement field of the diaphragm of the transducers (which can be highly nonuniform in the highest frequency range) must be characterized with an appropriate accuracy. An analytical approach, which leads to results depending on the location of the holes in the backing electrode (i.

[APACHE II and ATN-ISS in acute renal failure (ARF) in intensive care unit (ICU) and non-ICU].

Introduction: Acute renal failure (ARF) remains highly prevalent with a high rate of morbidity and mortality.

Objective: of this study was to compare use of the APACHE II scoring prognosis with that of the ATN-ISS to determine whether the APACHE II could be used for patients with ARF outside the ICU.

Methods: For this purpose, 205 patients with ARF were accompanied in a prospective cohort.