Noise immissions with predominant low frequency sound components may exert considerably disturbing effects in dwellings. This applies in particular to sounds which are excitated by transmission of structure-borne noise, and to low frequency sounds emitted by ventilators. Exposed persons usually declare such immissions as being "intolerable" even at very low A-weighted sound levels. If mechanica...

In speech processing systems with large speaker to microphone distance such as hearing aids or hands-free telephony the recorded speech signal is often heavily corrupted by additive acoustic background noise. Microphone arrays can significantly improve the received speech quality by extracting the desired speech source and suppressing disturbing background noise and reverberation. High performa...

We propose two new types of random patterns with R, G, B colors, which allow to design color filter arrays (CFAs) with good spectral properties. Indeed, the chrominance channels have blue noise characteristics, a property which maximizes the robustness of the acquisition system to aliasing. With these new CFAs, the demosaicking artifacts appear as incoherent noise, which is less visually distur...

In this paper, we proposed the phase disturbing device using randomly-fluctuated liquid crystal (LC) alignment to reduce speckle noise generated in holographic displays. Some parameters corresponding fluctuation of thick LC layer were quantitatively evaluated, and clarified effect with on reduction.

Disturbing factors like reverberation or ambient noise can impair speech recognition and raise the listening effort needed for successful communication in daily life. Situations with high listening effort are thought to result in increased stress for the listener. The aim of this study was to explore possible measures to determine listening effort in situations with varying background noise and...

Through modeling the difference between two face images by three components, intrinsic difference ( I ) , transformation difference (Q, and random noise (4, we show that the Bayesian algorithm can successfully separate the main disturbing component T from the discriminating component I , however at a cost of magnified noise N . To control the noise, we apply PCA on the original image, then carr...

Inviscid spatially compact vortices (such as the Rankine vortex) have discrete Kelvin modes. For these modes, the critical radius, at which the rotation frequency of the wave matches the angular velocity of the fluid, lies outside the vortex core. When such a vortex is not perfectly compact, but has a weak vorticity distribution beyond the core, these Kelvin disturbances are singular at the cri...