Purpose The purpose of this study is to characterize parameters used for frequency-following response (FFR) acquisition in children up to 24 months of age through a systematic review. Method The study was registered in PROSPERO and followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses' recommendations. Search was performed in six databases (LILACS, LIVIVO, PsycINFO, PubMed, Scopus, and Web of Science) and gray literature (Google Scholar, OpenGrey, ProQuest)as well as via manual searches in bibliographic references. Observational studies using speech stimuli to elicit the FFR in infants with normal hearing on the age range from 0 until 24 months were included. No restrictions regarding language and year of publication were applied. Risk of bias was assessed with the Joanna Briggs Institute Critical Appraisal Checklist. Data on stimulus, presentation rate, time window for analysis, number of sweeps, artifact rejection, online filters, stimulated ear, and examination condition were extracted. Results Four hundred fifty-nine studies were identified. After removing duplicates and reading titles and abstracts, 15 articles were included. Seven studies were classified as low risk of bias, seven as moderate risk, and one as high risk. Conclusions There is a consensus in the use of some acquisition parameters of the FFR with speech stimulus, such as the vertical mounting, the use of alternating polarity, a sampling rate of 20000 Hz, and the /da/ synthesized syllable of 40 ms in duration as the preferred stimulus. Although these parameters show some consensus, the results disclosed lack of a single established protocol for FFR acquisition with speech stimulus in infants in the investigated age range.

ARTIGOS 309Distúrb Comun, São Paulo, 31(2): 308-316, junho, 2019 teste(T1) e reteste (T2) pelo mesmo avaliador (reprodutibilidade). Resultados: Não houve diferença entre as frequências testadas no RGDT (média) no T1 e T2. Houve diferença no desempenho do GIN entre orelha direita e esquerda no T2. A reprodutibilidade de teste-reteste no RGDT (média) e GIN foi substancial conforme o coeficiente de correlação intraclasse. Conclusão: Há reprodutibilidade no teste RGDT quando comparada a média das frequências e no teste GIN bilateralmente.Palavras-chave: Audição; Reprodutibilidade dos testes; Percepção Auditiva; Adultos. AbstractThe behavioral test is frequent clinical practice in audiology due to its contribution to the diagnosis and speech therapy intervention processes. Objective: To verify the reproducibility of temporal resolution assessment protocols in adults. Method: A total of 34 subjects, 22 females and 12 males, with an average age of 26.21 years (20 to 52 years old; dp = 8.92) were included, following the criteria: absence of otological and/or audiological history and school complaints; normality in the audiological pattern and in the dichotic test of digits. The Random Gap Detection and Gap in Noise tests, at 50 dB, were used. Both were applied in two moments; the second application with a one-week interval of the first. The Wilcoxon test was used to analyze the performance of the sample in the GIN test in the ear and Friedman test in order to analyze the RGDT as a function of the frequency tested in the two moments. The level of significance of 5% was adopted. The intraclass correlation coefficient was used in the analysis of the agreement between the test (T1) and retest (T2) applications by the same evaluator (reproducibility). Results: There was no difference between the frequencies tested in the RGDT (mean) in T1 and T2. There was a difference in GIN performance between the ears in T2. The test-retest reproducibility in the RGDT (mean) and GIN was substantial according to the intraclass correlation coefficient. Conclusion: There is reproducibility in the RGDT test when compared to the mean frequencies and in the GIN test bilaterally.

Objective: to investigate the influence of the socioeconomic level on the temporal resolution auditory ability of adults. Methods: the sample consisted of 48 subjects aged 18 to 50 years, divided into three groups: G1, 11 subjects at level A; G2, 19 in B1 and B2 and G3, 18 in C1, C2, D and E. All subjects presented responses in 20 dB HL in frequencies of 500 to 4000 Hz, during audiometric screening, type A tympanometry, presence of contralateral and ipsilateral acoustic reflexes, no neurological, psychiatric and / or psychological changes diagnosed; without audiological and / or otological complaints and with performance above 95% in the dichotic digit test. The Random Gap Detection and Gap-in-noise tests were performed. The Shapiro-Wilk test for normality analysis and the Kruskall Wallis test for socioeconomic stratum analysis, were used, both with 5% significance. Results: there were statistically significant differences between the groups in the Random Gap Detection in the frequency of 500 Hz and in the average of the frequencies, as a function of the socioeconomic level, the same not being observed in the Gap-in-noise. Conclusions: it is suggested that the socioeconomic level be taken into account in the analysis of the Random Gap Detection test.

Introdução: A sífilis congênita é considerada indicador de risco para deficiência auditiva, e uma das suas possíveis manifestações clínicas é a perda auditiva, por isso é recomendado o monitoramento audiológico semestral desses bebês durante os dois primeiros anos de vida. Objetivo: Monitorar a saúde auditiva do bebê com sífilis congênita ao longo dos dois primeiros anos de vida. Métodos: Estudo de coorte aprovado pelo Comitê de Ética em Pesquisa (n° 4.648.404). Foram recrutados 230 bebês no período de maio/2019 a março/2020, divididos em três grupos: expostos a sífilis (Gexp), com sífilis congênita (GSC) e grupo controle (GC). Foram realizados a Triagem Auditiva com Potencial Evocado Auditivo de Tronco Encefálico-Automático (PEATE-A), o PEATE clique em 80 dB NA e as emissões otoacústivas evocadas transientes (protocolo clínico) com um e três meses no laboratório. Os grupos Gexp e GSC foram acompanhados por pediatras infectologistas e o GC pela puericultura. Todos realizaram, quando indicado, Estudo Laboratorial de Doenças Venéreas no primeiro e no terceiro mês. Resultados: Dos 230 bebês recrutados, 107 compareceram e 5 foram excluídos por apresentarem outros indicadores de risco para deficiência auditiva. Daqueles, 93 bebês realizaram PEATE-A e 5 apresentaram resultado falha em pelo menos uma orelha, sendo 3 do GC e 2 do GSC, 78 realizaram o PEATE clique, em que 10 apresentaram resultados alterados em pelo menos um dos parâmetros, sendo 3 do GSC e 8 do GC, e 65 bebês realizaram emissões otoacústivas evocadas transientes; destes, 19 tiveram ausência de resposta em pelo menos uma orelha, sendo 7 do GSC, 10 do GC e 2 do Gexp. Conclusão: Até o momento, não houve diferença entre os grupos. Em virtude da pandemia, os bebês não puderam realizar as avaliações audiológicas sequenciais, mas foram acompanhados via teleconsulta com aplicação de checklists. Pretende-se dar seguimento ao projeto, visto a necessidade de esclarecer se há risco do desencadeamento da perda auditiva tardia nesses bebês.