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Suppression of otoacostic emissions in children in typical development: different evaluation parameters

Grant number: 17/21073-7
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): January 01, 2018
Effective date (End): December 31, 2018
Field of knowledge:Health Sciences - Speech Therapy
Principal Investigator:Maria Francisca Colella dos Santos
Grantee:Giovanna Cristina Bertelli de Lacerda
Host Institution: Faculdade de Ciências Médicas (FCM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Introduction: Despite the large number of studies involving the suppression of Otoacoustic Emissions (OAE) to study the efferent pathway of the Central Auditory System in humans, there is still a gap between the acquired scientific knowledge and the application of suppression of OAE in clinical practice. This is due, in part, to the different parameters used in several studies, making it difficult to reach a consensus about the usefulness and viability of this tool as an evaluation in the differential diagnosis of auditory alterations. Objective: This project aims to evaluate the efferent pathway of the auditory system by suppressing Transient Otoacoustic Emissions (TEOAE) in children of school age and typical development. Method: It will be evaluated 30 children, of both sexes, being 15 males and 15 females between 8 and 11 years old. The collection of Transient Otoacoustic Emissions will be performed with click stimuli, linear, presented at 60 dB NPS. The suppression research will be performed with contralateral white noise (at 60 dB NPS), interspersing the presentations of blocks with and without noise, with duration of 10 ms each, totalizing 260 sweeps in each collection condition (without and with suppressor noise). Before the start of the collection, the children will perform a basic audiological evaluation to guarantee normal peripheral hearing. Expected Results: At the end of the research, it is expected to obtain normality data and cut-off values for the suppression of Transient Otoacoustic Emissions in school-age children, establishing a protocol that is easy to use and can assist in differential diagnosis and intervention of the school difficulties and / or changes in auditory processing. (AU)

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