Noise Suppression
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. The Relationship between Contralateral Suppression of Transient Evoked Otoacoustic Emission and Unmasking of Speech Evoked Auditory Brainstem Response
Abstract Introduction Several studies have shown that efferent pathways of the auditory system improve perception of speech-in-noise. But, the majority of investigations assessing the role of efferent pathways on speech perception have used contralateral suppression of otoacoustic emissions as a measure of efferent activity. By studying the effect of effere
International Archives of Otorhinolaryngology. Publicado em: 2022
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2. Reliability of Contralateral Suppression in Evoked Distortion Product Otoacoustic Emissions
Abstract Introduction Distortion product otoacoustic emissions (DPOAE) and their suppression may be considered useful in monitoring cochlear function and the efferent auditory pathway inhibitory effect. Nonetheless, the establishment of reliable parameters of response variations is of great importance. Objectives To verify the replicability of test and ret
International Archives of Otorhinolaryngology. Publicado em: 2022
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3. The efficacy and safety of multiple sessions of multisite transcranial random noise stimulation in treating chronic tinnitus
Resumo Introdução: Tem sido relatado que a estimulação transcraniana por ruído aleatório é um tipo mais eficaz e seguro de técnica de estimulação elétrica no alívio dos sintomas do zumbido. O protocolo multissítio da estimulação transcraniana por ruído aleatório mostrou efeitos favoráveis adicionais. Objetivo: Discutir o papel da aplicaç
Braz. j. otorhinolaryngol.. Publicado em: 07/11/2019
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4. A flexible multichannel FPGA and PC-Based ultrasound system for medical imaging research: initial phantom experiments
IntroductionIn this paper, we present the initial results of a fully programmable 128-channel FPGA and PC-based system that has been developed for medical ultrasound (US) imaging research in our University laboratory (Federal University of Technology - Paraná, Brazil).MethodsIn order to demonstrate the feasibility of the US research system, two applications
Res. Biomed. Eng.. Publicado em: 29/09/2015
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5. Estudo do processamento auditivo e da supressão das emissões otoacústicas em crianças com dislexia do desenvolvimento / Study of auditory processing and suppression of otoacoustic emissions in children with developmental dyslexia
Introduction: For an adequate development of learning and writing abilities it is necessary the nervous system integrity, selective and sustained attention, auditory discrimination, short and long term memories and phonological awareness, which can be evaluated through auditory processing (AP) tests. It has been suggested that the function of the medial oliv
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2011
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6. Crianças prematuras: estudo da supressão das emissões otoacústicas e da resolução temporal. / Premature children: study of suppression effect of otoacoustic emissions and temporal resolution
Objective: Determine the occurrence of the suppression of otoacoustic emissions, the temporal resolution hearing skill and the association between the results of these assessments and premature birth as well as the presence of signs suggestive of an alteration in auditory processing during development, in premature, below 2000g at birth. Methods: Forty low-i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/01/2011
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7. Supressão das anomalias de fase e batimentos laterais em espectros de RMN 13c obtidos com a sequência de precessão livre no estado estacionário
The Steady-State Free Precession (SSFP) sequence has been widely used in low-field and low-resolution imaging NMR experiments to increase the signal-to-noise ratio (s/n) of the signals. Here, we analyzed the Scrambled Steady State - SSS and Unscrambled Steady State - USS sequences to suppress phase anomalies and sidebands of the 13C NMR spectrum acquired in
Química Nova. Publicado em: 2010
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8. CFD and CAA analysis of single stream isothermal jets with noise suppression devices.
Since the 50 s, with the appearance of the turbojet engines, the jet noise is being exhaustively studied, because it is one of the most important source of aircraft noise. Many attempts have been made to reduce the jet noise, including higher by-pass turbofan engines. Chevron nozzles also have been used by the industry to try to reduce the jet noise with a l
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2009
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9. DIVISORES DE FREQÜÊNCIA POR DOIS PARAMÉTRICOS BALANCEADOS A PHEMT PARA RECEPTORES DE DEFESA ELETRÔNICA / PHEMT BALANCED PARAMETRIC FREQUENCY DIVIDER BY TWO FOR ELECTRONIC DEFENSE RECEIVERS
This work assesses the development of PHEMT balanced parametric frequency dividers by two, intended for application as frequency converters on Electronic Defense digital receivers. The main characteristics of these devices are design simplicity, reduced number of components, possibility of integration in MMIC, phase coherence, wide bandwidth, very good pulse
Publicado em: 2009
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10. EstatÃstica de contagem de carga e efeitos de interferÃncia em sistemas mesoscÃpicos
In this thesis we presented a detailed study about full counting statistics of transmitted charge and accumulated phase and the quantum interference corrections to the average conductance and the average shot-noise power in non-ideal ballistic chaotic cavities. In the theoretical analysis of this mesoscopic system, we obtained analytical expressions for the
Publicado em: 2009
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11. Utilização de equações diferenciais parciais para eliminação de ruídos e detecção de bordas
The edge detection of digital images is a research field that has attracted great interest from the scientific community. Their applications go from the automatic inspection and quality control of industrial piece to the diagnosis of malignancy of cancerous tumors. However, many existing edge detectors have problems related to false edge detection. In this c
Publicado em: 2008
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12. Transient otoacoustic emissions suppression in pre-term infants of high risk for hearing loss / Efeito de supressão das emissões otoacústicas evocadas por estímulo transiente em lactentes de risco nascidos pré-termo
Objective: The objective of this research was to study the occurrence and magnitude of the transient otoacoustic emissions suppression in pre-term infants of high risk for hearing loss. Methods: The was carried out in 15 preterm infants. The equipment used was the ILO USB II V6 Clinical OAE Software from Ododynamics. The stimulation used was linear click pre
Publicado em: 2007