Mi smatch Negativity is an endogenous potential which reflects the processing of differences incurred in the acoustic stimulus. Aim: to characterize MMN responses in elderly subjects and compare with adult subjects. Materials and methods: prospective study involving 30 subjects, 15 men and 15 women, aged between 60 and 80 years and 11 months. Statistical test: Mann-Whitney. The subjects went th...

In this paper, a CMOS custom Integrated Circuit featuring a multi-stage Universal Switched-Capacitor (SC) Filter is Introduced. The network is based on the Generalized Immittance Converter (GIC) configuration, known for its excellent passive and active sensitivities. CMOS switches were used for elements relocation and are digitally controlled to select and realize different filter topologies. S...

Previous research has reported reduced otoacoustic emission amplitude as a function of age. In each study, however, interpretation of findings was confounded by age-related hearing loss. The present study was designed to re-evaluate the contribution of age and peripheral hearing loss on the prevalence and amplitude of distortion-product otoacoustic emissions (DPOAEs) by controlling for degree o...

Objectives . To synthesize phosphorus-containing oligoestermethacrylates spatially separated by spacers of aliphatic or aromatic structure and evaluate their effect on photocuring kinetics. Methods For determining the qualitative quantitative composition synthesized compounds, following methods were used: thin layer chromatography; chromatographic mass spectrometry; infrared spectroscopy; 1H, 1...

The previous cut-insertion theorem, defined for linear circuits and particular three-terminal (TTCs) to be inserted into the cut, is here extended any TTC and, in a simplified form, non-linear networks. may include dependent independent sources other passive and/or elements, together with remaining part of circuit, determines feedback loop which “transmission factors” T $$ ′ {T}^{\prime } can c...