In this paper a new noise spectrum estimation algorithm is described for single-channel acoustic noise suppression systems. To achieve fast convergence during abrupt change of noise floor, the proposed algorithm uses a minimum correction module to adjust an adaptive noise estimator. The minimum search duration is controlled by a harmonicity module for improved noise tracking under continuous vo...

As interests in implantable devices and bio-electrical systems grow, intelligent embedded systems become important for extracting useful information from continuous-valued, noisy and drifting biomedical signals at sensory interfaces. Probabilistic generative models utilise stochasticity to represent the natural variability of real data, and therefore suggest a potential approach to this applica...

In this Letter, first, we investigate the security of a continuous-variable quantum cryptographic scheme with a postselection process against individual beam splitting attack. It is shown that the scheme can be secure in the presence of the transmission loss owing to the postselection. Second, we provide a loss limit for continuous-variable quantum cryptography using coherent states taking into...

Besides the traditional circuit-based model of quantum computation, several quantum algorithms based on a continuous-time Hamiltonian evolution have recently been introduced, including for instance continuous-time quantum walk algorithms as well as adiabatic quantum algorithms. Unfortunately, very little is known today on the behavior of these Hamiltonian algorithms in the presence of noise. He...

We assessed the ability of cats to detect repeated noise (RN), a stimulus generated by seamlessly presenting short segments of white noise in a continuous loop, in a modified go-nogo task. A recent study of the gerbil suggested that animals might have an extremely limited ability to detect RN compared to human subjects. We find that cats can discriminate RN from continuous noise with reasonable...

A nonlinear functional is considered in this letter for segmentation and noise removal of piecewise continuous signals containing binary information contaminated with Gaussian noise. A discontinuity is defined as points in time scale that separates two signal segments with different amplitude spectra. Segmentation and noise removal of a piecewise continuous signal are obtained by deriving equat...

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 ...

Modern weapon systems produce very high levels of impulse and/or continuous noise. Exposure to intense noise induces mechanical and/or metabolic damage to the inner ear. At the hearing threshold the amplitude of the displacements of the sensory structures of the inner ear (stereocilia) is about 10 m (1/100 the diameter of the hydrogen atom). At 120 dB this amplitude reaches 1 micrometer (corres...

SUMMARY A new approach to speech feature estimation under noise circumstances is proposed in this paper. It is used in noise-robust continuous speech recognition (CSR). As the noise robust techniques in isolated word speech recognition, the running spectrum analysis (RSA), the running spectrum filtering (RSF) and the dynamic range adjustment (DRA) methods have been developed. Among them, only R...