Signal To Noise Acoustic
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. The effectiveness of berberine on noise-induced hearing loss: a rat model
SUMMARY OBJECTIVE: Noise-induced hearing loss is a preventable form of hearing loss that has serious social and economic impacts. This study aimed to investigate the protective effect of berberine, a potent antioxidant and anti-inflammatory agent, against Noise-induced hearing loss. METHODS: After applying distortion product otoacoustic emission, 28 female
Revista da Associação Médica Brasileira. Publicado em: 2022
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2. Balancing the Loudness in Speech Processors and Contralateral Hearing Aids in Users of Unilateral Cochlear Implants
Abstract Introduction The use of cochlear implants and hearing aids (bimodal) has been growing with the expansion of the indication for them, and it is important to ensure protocols so that there is a balance of the loudness regarding the two devices. Objective To evaluate if the limited complex sounds present in the frequency bands of the current devices
Int. Arch. Otorhinolaryngol.. Publicado em: 2021-04
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3. Análise acústica da voz: comparação entre dois tipos de microfones
RESUMO Objetivo Comparar os valores das medidas acústicas da voz, extraídas de gravações vocais realizadas com dois tipos de microfones. Métodos Participaram da pesquisa 103 pessoas do sexo feminino, com idades entre 18 e 54 anos. Foram coletadas amostras da vogal sustentada /e/, captadas por dois microfones, simultaneamente: Shure SM58 e Karsect HT-9
Audiol., Commun. Res.. Publicado em: 23/05/2019
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4. Savitzky-Golay Filter for Denoising Lung Sound
ABSTRACT For computerized analysis of respiratory sounds to be effective, the acquired signal must be free from all the interfering elements. Different forms of noise which can degrade the quality of lung sounds are recording artifacts, power line/Radio Frequency (RF) interferences, ambient acoustic interferences, heart sound interference etc. Such interfere
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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5. Percepção da fala em crianças usuárias de implante coclear com duas estratégias de processamento do sinal do sistema HiResolution / Speech perception in children with cochlear implants with two sound processing strategy of the HiResolution system
Improvements in speech perception with cochlear implant (CI) over the years is related, among others factors, to the technological advance of the sound processing strategy. The purpose of the present study was to investigate speech perception performance in CI children, with two different Advanced Bionics sound processing strategy. Subjects were 11 prelingua
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/10/2012
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6. Detecção e localização de vazamentos em tubulações utilizando sistemas acústicos e redes neurais / Leak detection and location in pipelines through acoustic method and neural networks
Pipeline networks are complex systems of ducts used nowadays for gas and chemical products transporting through long distances. They frequently cross highly populated regions, water supplies or natural reserves. Even small leaks in pipelines can lead to great losses of products and serious damages to the environment before it could be detected. With the purp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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7. Resolução temporal auditiva de crianças usuárias de implante coclear / Auditory temporal resolution in children using cochlear implantation
Auditory temporal resolution is considered one of the most important skills for acoustic signal processing along the time. It allows the identification of fine differences of speech segmental aspects, such as phonemes and the beginning and end of words in linked phrases. Children using a cochlear implant (CI) present specific characteristics of speech sign d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/07/2011
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8. Controle acústico híbrido da perda de transmissão sonora / Hybrid acustic control of sound transmission loss
The control of transmission loss through panels is a problem that has attracted the attention of automotive, aeronautical and aerospace industries. The passive noise control strategies used for this purposed does not have high efficiency in all audible spectrum, although it consists in a robust solution, it is not effective in low frequency absorb (below 1kH
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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9. Virtual acoustic prototyping applied to hammer noise of automotive tires / Prototipagem virtual sonora aplicada a ruido de martelamento de pneumaticos automotivos
This study explored the automotive tire noise generation mechanism known as hammer noise, according to the Virtual Acoustic Prototyping approach. A theoretical model available in the literature that considers only the plurality of block pitches in the tread band was implemented. Based on this model, two improved models were developed and implemented consider
Publicado em: 2009
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10. Development of digital behind-the-ear hearing aid with minimal specifications / Desenvolvimento de prótese auditiva retroauricular, digital e de especificações mínimas
The International Federation of Oto-Rhino-Laryngological Societies (IFOS) estimates as 10% the total amount of hearing impaired in United States. The Better Hearing Institute asserts that in United States about 31 million people have hearing losses in some degree, say around 10% of total population. Increasing the amount of hearing-impaired there is a list o
Publicado em: 2009
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11. MODIFICAÇÕES VOCAIS DECORRENTES DA TÉCNICA FONOTERAPÊUTICA DE SONS HIPERAGUDOS
describe the acoustic vocal modifications occurred after the vocal technique of the high-pitched sound in young adult women without voice complaints and with normal larynx, it was done through Multi-Dimensional Voice Program. Method: 23 subjects participated in the study who signed the Statement of Free and Informed Consent, completed a questionnaire, the ea
Publicado em: 2008
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12. Speech recognition in classroom noise of children from 4th grade of elementary school / Reconhecimento da fala de crianças da 4 série na presença do ruído da sala de aula
Learning process needs some optimal conditions in order to happen one of them is an adequate signal-to-noise ratio Voices teacher and background noise may be considerate when studying the influence of background noise on speech intelligibility of students at classroom In order to answer these questions this research has as goal to analyze the speech recognit
Publicado em: 2005