OBJECTIVES There is a growing body of data showing that low frequency noise (LFN), defined as broadband noise with dominant content of low frequencies (10-250 Hz) differs in its nature from other environmental noises at comparable levels. The aim of the study was to investigate whether exposure to LFN at levels normally occurring in the industrial control rooms can influence human mental perfor...

* This paper is supported by National Science Foundation of China (69872014) ABSTRACT The performance of widely-used adaptive noise canceling(ANC) deteriorates much when the desired signal is leaked into the reference channel or when there are uncorrelated noises present in the reference channel. This paper proposes a dual-microphone scheme, named Iterative Noise Canceling (INC), to overcome th...

The WALNUT project is funded by the Dutch Technology Foundation STW through the Open Technology program Noise Based Transmitted Reference Modulation for Wireless Sensor Networks Mahdin Mahboob1, Arjan Meijerink1, Sarwar Morshed2, Geert Heijenk2, Mark Bentum1 University of Twente 1Telecommunication Engineering Group, 2Design and Analysis of Communication Systems Group, P.O. Box 217, 7500 AE, Ens...

We have designed and tested a very low-noise, highaccuracy programmable voltage reference that is intended as an alternative to batteries for the realization of automated low-frequency noise measurement systems. The output voltage, which can be set via a built-in RS232 interface, ranges from 0 to 5 V with a resolution and long-term stability of 250 V. The power spectral density of the output vo...

The aim of this work is to define a no-referenced perceptual image quality estimator applying the perceptual concepts of the Chromatic Induction Model The approach consists in comparing the received image, presumably degraded, against the perceptual versions (different distances) of this image degraded by means of a Model of Chromatic Induction, which uses some of the human visual system proper...

in recent years noise has been well known as an environmental pollution. particularly its effects will be more serious in some environments including hospitals which patients need a calm and peaceful condition. this study aims to evaluate hospitals noise pollution level. this study is a cross-sectional study. noise measurements were made in all hospital wards in a workday and weekend from 8 to ...