PURPOSE To analyze the findings for Evoked Otoacoustic Emissions (EOEA) and suppression effect in workers with normal hearing exposed to pesticides and noise . METHODS The sample consisted of 55 participants with normal hearing, with ages ranging from 18 to 35 years, divided into two groups: one group exposed to noise and pesticides (GRA) and a control group (CG). The GRA was composed of 25 p...

This paper presents the results of research on the effectiveness of different filtering methods dedicated to speckle suppression in SAR images. The tests were performed on RadarSat-2 images and on an artificial image treated with simulated speckle noise. The research analysed the performance of particular filters related to the effectiveness of speckle suppression and to the ability to preserve...

Noise (N), reverberation (R), and a combination of N and R (NR) differently degrade speech intelligibility. The current study aims to improve speech intelligibility in public spaces by processing speech signals through public address systems (a preprocessing approach). As a preprocessing approach, we proposed steady-state suppression, and it has improved consonant identification in R. The curre...

We present a microscopic analysis of shot-noise suppression due to long-range Coulomb interaction in semiconductor devices under ballistic transport conditions. An ensemble Monte Carlo simulator selfconsistently coupled with a Poisson solver is used for the calculations. A wide range of injection-rate densities leading to different degrees of suppression is investigated. A sharp tendency of noi...

The process of suppressing acoustic noise in audio signals, and speech signals in particular, can be improved by exploiting the masking properties of the human hearing system. These masking properties, where strong sounds make weaker sounds inaudible, are calculated using auditory models. This thesis examines both traditional noise suppression algorithms and ones that incorporate an auditory mo...

Although the speech transmission index (STI) has been shown to predict successfully the effects of linear distortions introduced by filtering and additive noise, it does not account for non-linear distortions present in noise-suppressed speech. In this study, the normalized covariance metric (NCM), a STIbased intelligibility measure, was modified to reduce the effects of non-linear distortions ...

In this paper, we examine and suppress the effects of stimulated Brillouin scattering on the phase noise of a 10 GHz signal transmitted over an RF-photonic link. We demonstrate the appearance of interference peaks in the RF phase noise of a microwave signal transmitted through a 10 km optical fiber link. We attribute these peaks to double Brillouin scattering using a reduced model. We determine...

Output correlations and power spectral densities are obtained for two types of generalized median jilters : the Land M-jilters, ,for a sequence of independent, identically distributed inputs and also for a simple first-order Markov input sequence. The results show the ability of generalized median jilters to flexibly achieve performance compromises between edge preservution and impulsive noise ...

Morphological filters based on the composition of openings and closings called alternating sequential filters are examined and their noise suppression action is investigated. Also they are compared with conventional filters then from the results it is found that alternating sequential filters are better than these filters in impulse noise removing.