Absorbance acoustics in neonates failed in newborn hearing screening

• Grant number: 14/25928-9
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): March 01, 2015
• Effective date (End): December 31, 2015
• Field of knowledge: Health Sciences - Speech Therapy
• Principal researcher: Renata Mota Mamede Carvallo
• Grantee: Daniela Mansoldo
• Home Institution: Faculdade de Medicina (FM). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Hearing is one of the primary to the human senses, is one of the reasons he is responsible for the future development of the language of the individual. For this reason, there is a clear need to assess hearing logo during the first days of life in infants. Through the otacústicas emissions test, the audiologist professional checks the functioning of inner hair cells, responsible for amplifying and transmitting sound energy to the cerebral cortex, aiming to identify the peripheral and central hearing impairment and intervene as soon as possible trying to avoid or minimize future changes (Azevedo, 2004). The audiological diagnosis (identification of peripheral and central hearing loss) realized during the first year of life provides the medical and speech therapy, yet this critical period, ie, maturation and functional plasticity of the central nervous system, preventing future changes and allowing more favorable prognosis compared to the child's overall development (Yoshinaga-Itano et al., 1998). The main objective of this study is to analyze the function of the middle ear by acoustic absorbance in neonates who failed the first stage of TANU. A total of 30 infants were divided into two experimental groups will be evaluated, and the group I consists of newborns who passed the retest of TANU and the group II consists of neonates who failed the retest of TANU. Verification of middle ear function based on the evaluation of the tympanogram with 1000 Hz probe (Y, B / G) and acoustic absorbance (during his research that the response curve is obtained in the frequency range 250-6000 Hz will be held intensity of 60 dB SPL with each stimulus ranging from 0.1 to 10 seconds per point). And for the statistical analysis with the assumption that the data distribution can not be normal, non-parametric tests will be used, having supported the SPSS software version 18 for descriptive and inferential analysis.