Time-domain acoustic contrast control method using loudspeaker array has been studied for generating bright and dark zones in personal audio system. Acoustic contrast which is defined as the acoustic energy ratio between bright and dark zones can be inevitably influenced by the uncertainties in the frequency response of loudspeakers. In this paper, a robust extension of broadband acoustic contr...

background: in the steel industry, coke-fueled furnaces are used for smelting iron ore to produce cast iron are considered as sources of annoying noise.this study aims to evaluate the noise pollution blast furnace and sound source characteristics in order to present noise control measures in the steel industry. methods: measurement of noise level and its frequency analysis was performed using s...

1B-2 Modeling and Control of an Alternative Steering System for Hybrid Vehicles Pradeep Setlur, Val Mills, Dr. John Wagner, and Dr. Darren Dawson Hybrid vehicles integrate an electric motor with accompanying battery pack and generator, an internal combustion engine, and potentially fuel cells to acquire greater fuel economy and reduced emission levels. Automotive subsystems such as hydraulic po...

Maxwell pressure is the cause of stator deflection at the origin of acoustic noise radiated by stator. That is why precise determination of air-gap radial flux density Bg is of prime importance. It could be obtained by finite element method, semi numerical or totally analytic method with computation of magneto motive force and permeance. Slot number, pole pair number and PWM affecting acoustic ...

In this paper we revisit the recently proposed triphone mapping as an alternative to decision tree state clustering. We generalize triphone mapping to Kullback-Leibler based hidden Markov models for acoustic modeling and propose a modified training procedure for the Gaussian mixture model based acoustic modeling. We compare the triphone mapping to decision tree state clustering on the Wall Stre...

In this paper, a bottom-up, activation-based paradigm for continuous speech recognition is described. Speech is described by co-occurrence statistics of acoustic events over an analysis window of variable length, leading to a vectorial representation of high but fixed dimension called “Histogram of Acoustic Co-occurrence” (HAC). During training, recurring acoustic patterns are discovered and as...

A linear theory of dust acoustic (DA) and dust ion-acoustic (DIA) waves in a self-gravitating collisional dusty plasma contaminated by variable-charge impurities is presented for a self-consistent closed system. The ion-drag force arising from the ion orbital motion as well as momentum transfer from all the ions and self-gravitation are taken into consideration. The physical processes, viz., du...