For the first time, we report the link between, on the one hand, return path ingress and impulse noises measurements and, on the other hand, their relative impact on a 16-QAM transmission. We show that both ingress and impulse noise measurements must be realised in parallel in order to characterise return path noise performance. Diagrams (spectrograms) which exploit both ingress and impulse noi...

Spectral subtraction based speech enhancement methods are known to be effective for the suppression of additive stationary, broadband noise. Tonal noises such as car horn sounds are found to cause serious degradation of the output speech quality. A method is proposed in this work that incorporates RASTA processing within the framework of spectral subtraction in order to achieve better suppressi...

A fundamental challenge in modern mantle geochemistry is to link geochemical data with geological and geophysical observations. Most of the early geochemical models involved a layered mantle and the concept of geochemical reservoirs. Indeed, the two layer mantle model has been implicit in almost all geochemical literature and the provenance of oceanic island basalt (OIB) and mid-ocean ridge bas...

Discrimination of the blind and dispersed mineralization deposits is a challenging problem in geochemical exploration. The frequency domain (FD) of the surface geochemical data can solve this important issue. This new exploratory information can be achieved using the interpretation of FD of geochemical data, which is impossible in spatial domain. In this research work, FD of the surface geochem...

The surface geochemical response to bedrock containing elevated levels of the platinum group elements (PGE) is commonly so subtle that standard geochemical methods are insufficiently sensitive to assist the exploration geologist. At the Geological Survey of Canada, recent research on analytical methods by one of us (GEMH) has been directed toward the development of a selective leach of soils an...

Random or incoherent noise is an important type of seismic noise, which can seriously affect the quality of the data. Therefore, decreasing the level of this category of noises is necessary for increasing the signal-to-noise ratio (SNR) of seismic records. Random noises and other events overlap each other in time domain, which makes it difficult to attenuate them from seismic records. In this r...