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Automatic recognition of accessible pedestrian signals
(2018)
Accessible pedestrian signals (APS) enhance accessibility in streets around the world. Recent attempts to extend the use of APS to people with visual and audible impairments have emerged from the area of audio signal ...
Aspectos comportamentais e eletrofisiológicos da percepção de alturas sonoras: um estudo sobre o ouvido absoluto
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM NEUROCIÊNCIAS, 2017-02-23)
In humans, the processing of sound information allowed the appearance of speech and music.
The pitch - which allows the melody of a song and prosody in spoken discourse - is one of
these attributes. Pitch perception is ...
Extracción de parámetros de señales de voz usando técnicas de análisis en tiempo - frecuencia
(2004)
En este trabajo se presenta la extracción de características de señales de voz basada en transformada wavelet. Las características se pueden clasificar en los tipos acústico y de representación. Dentro de las características ...
The use of instantaneous phase for improving sparse arrays images
(Ieee, 2013-01-01)
Sparse arrays have pitch larger than half-wavelength (lambda/2) and there is a reduced number of elements in comparison with a full-populated array. Consequently, there is a reduction in cost, data acquisition and processing. ...
Classification of lexical stress using spectral and prosodic features for computer-assisted language learning systems
(Elsevier Science, 2015-02)
We present a system for detection of lexical stress in English words spoken by English learners. This system was designed to be part of the EduSpeak® computer-assisted language learning (CALL) software. The system uses ...
Automatic detection of gaze and body orientation in elementary school classrooms
(Frontiers Media, 2021)
Detecting the direction of the gaze and orientation of the body of both teacher and students is essential to estimate who is paying attention to whom. It also provides vital clues for understanding their unconscious, ...
Use of effective play-space by U12 FC Barcelona players: an observational study combining lag sequential analysis and T-pattern detection
This observational methodology study had a substantive and a methodological aim. The substantive aim was to analyse the use of overall and effective play-space (EP-S) in the construction of offensive sequences ending in a ...
Máquina de vetores de suporte e técnicas estatísticas para previsão e classificação de falha de turbinas eólicas
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2021-03-25)
Wind energy is dominant technology among the generation of renewable energies in Brazil and due to the high growth in recent years there is a need to develop accurate fault diagnosis techniques in wind turbines to reduce ...
Instantaneous Phase Threshold for Reflector Detection in Ultrasonic Images
(Institute of Electrical and Electronics Engineers (IEEE), 2014-07-01)
A method for reflector detection, based on the instantaneous phase of the aperture data for ultrasonic images, is proposed. The instantaneous phase (IP) image is obtained by replacing the amplitude information by the ...