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In most speech enhancement algorithms, a frequency response is computed per each block, and a multiplication in the frequency domain is used to apply this frequency response. Typically, in these algorithms, the updating procedure cannot ensure the fulfillment of the condition to perform a linear convolution instead of a circular convolution. As a result,(More)
Most speech enhancement applications perform frequency shaping by means of multiplication in the frequency domain. Operating in the frequency domain is equivalent to convolution in the time domain. In these speech enhancement algorithms, the updating of frequency response alone cannot ensure the fulfillment of the conditions required for multiplication in(More)
Different noise-reduction methods have been proposed in the literature for single and multiple-microphone applications. For binaural hearing aids, multiple-microphone noise-reduction methods offer two significant psycho-acoustical advantages with respect to the single-microphone methods. First, noise reduction strategies based on binaural processing(More)
Binaural noise-reduction techniques based on Multichannel Wiener filter (MWF) are promising candidates to be used in binaural hearing aids. The real-time implementation of the existing MWF methods involves different challenges, e.g. the robustness against errors in the estimation of the second-order statistics. A typical approach in MWF to estimate these(More)
Binaural hearing aids use a wireless link to exchange the signals received at each side, allowing the implementation of sophisticated noise-reduction strategies. Although different noise-reduction strategies have been reported for binaural hearing aids, those based on Multichannel Wiener filter (MWF) have been identified to provide the best SNR improvement(More)
The Cleft and Lip Palate (CLP) is a malformation with high recurrence in Colombia, which affects the ability of the phonation system, making difficult the effective communication of the patient. This research seeks to find patterns that enable to detect hypernasality without using invasive diagnostic methods. We performed an analysis of a large range of(More)
Several studies, including the most recent report of the Program for International Students Assessment, accompanied by the annual measurements by the Colombian Institute for Education Evaluation ICFES (for its acronym in Spanish: Instituto Colombiano para la Evaluación de la Educación) agree an obvious deficiency of students tested, both in(More)