A research programme to investigate the feasibility of using active control systems to control the radiated noise of a naval platform due to the on-board machinery was first setup in the late 1970s at the Defence Evaluation and Research Agency. The programme covers the development of control algorithms, development of the hardware for the controller, a trial on a naval platform, analysis of the...

This paper presents a Kalman filter based method for diagnosing both parametric and catastrophic faults in analog circuits. Two major innovations are presented, i.e., the Kalman filter based technique, which can significantly improve the efficiency of diagnosing a fault through an iterative structure, and the Shannon entropy to mitigate the influence of component tolerance. Both these concepts ...

Noise is essential for the existence of a liquid market, and if noise traders are not present in the market, the trade volume will drop severely and an important aspect of the market philosophy will be lost. However, these noise traders bring noise to the market, and the existence of noise in prices indicates a temporary deviation in prices from their fundamental values. In particular, high-fre...

  Background : Noise pollution and workers' noise exposure are common in industrial factories in Iran. In order to reduce this noise pollution, evaluation and investigation of noise emission are both necessary. In this study, different noise mapping methodsare used for determining the distribution of noise.   Materials and Methods : In the present study, for preparing a noise map i...

BACKGROUND Prior research has reported disparities in environmental exposures in the United States, but, to our knowledge, no nationwide studies have assessed inequality in noise pollution. OBJECTIVES We aimed to a) assess racial/ethnic and socioeconomic inequalities in noise pollution in the contiguous United States; and b) consider the modifying role of metropolitan level racial residential...

Noise suppression using piezoelectric elements has received extensive attention in recent years. Traditional active noise control methods usually require the use of microphones as sensors to directly measure the sound pressure in either feed-forward or feedback control schemes. This makes the traditional active noise isolation more difficult to implement in some practical applications. Nonlinea...

Diffraction gratings have been proposed as core optical elements in future laser interferometric gravitational-wave detectors. In this paper, we derive equations for the coupling between alignment noise and phase noise at diffraction gratings. In comparison to a standard reflective component (mirror or beam splitter) the diffractive nature of the gratings causes an additional coupling of geomet...

The effects of background noise on speech-evoked cortical auditory evoked potentials (CAEPs) can provide insight into the physiology of the auditory system. The purpose of this study was to determine background noise effects on neural coding of different phonemes within a syllable. CAEPs were recorded from 15 young normal-hearing adults in response to speech signals /s/, /ɑ/, and /sɑ/. Signals ...

Bosson and Hong' have developed an effective procedure for multiple fault detection. However, their claim that their procedure gives near-minimal results is not necessarily the case. Poage [1] has considered the problem of generating test patterns for multiple fault detection. His method can be used to find a minimal set of fault-detection tests; however, it has the drawback that it is computat...

A 1.8V, 2.4 GHz CMOS low noise amplifier (LNA) is proposed to be used in front end receiver of Wireless LAN (WLAN) and Industrial Scientific and Medicine (ISM) band. The circuit is simulated in tsmc 180nm V 3.2. The optimization for the width of the CMOS is done taking into consideration parameters viz. noise figure (NF), Power consumption, gain, stability and linearity. The matching of input c...