Navegando por Palavras-chave "estimulação acústica"

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    Emissões otoacústicas por produto de distorção e audiometria tonal liminar: estudo da mudança temporária do limiar
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2002-05-13) Frota, Silvana [UNIFESP]; Iorio, Maria Cecilia Martinelli [UNIFESP]; UFRJ; Universidade Federal de São Paulo (UNIFESP)
    Introduction: Noise-induced hearing loss is one of the most common causes for sensorineural hearing impairment. Objective: The purpose of this study was to evaluate pure tone and distortion product otoacoustic emissions (DPOAE) pre and post white noise exposition at high levels (100 dB SPL for 10 minutes), considering gender and ear variables, aiming at investigating pure tone audiometry and DPOAE efficiency in detecting subtle temporary threshold shifts (TTS). Study design: prospectivo clinical randomized. Material and method: Forty subjects, 20 male and 20 female ranging from 18 to 36 years old with no otological complaints were evaluated. Pure tone audiometry and DPOAE were carried out pre and post white noise exposure. Results: Pure tone audiometry was sensitive in detecting temporary threshold shifts after white noise exposition in 2, 3 and 4 kHz, with no significant differences concerning gender and ear, whereas DPOAE revealed temporary shifts in audibility evidenced by amplitude reduction, in 2588 and 3614 in female subjects and in 932, 1304, 2588 and 5128 Hz in male subjects. Conclusion: We could conclude that either pure tone audiometry or DPOAE were sensitive in determining significant temporary shifts in hearing thresholds and amplitude, respectively, after white noise exposition, according to the involved frequency range
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    Percepção auditiva em síndrome de Alport
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2006-12-01) Viveiros, Carla Mherlyn [UNIFESP]; Pereira, Liliane Desgualdo [UNIFESP]; Mastroianni Kirsztajn, Gianna [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Alport s Syndrome is characterized by the presence of renal, hearing and visual disorders. Objective: To characterize the TOAE and the MOES activity (suppression effect) in individuals with Alport s Syndrome. MATERIAL AND METHOD: This is a prospective study of a sample included ten individuals with a diagnosis of Alport s Syndrome. MOES recording was made in the presence and absence of contralateral stimulation (CLS) stimulation using the computer software ILO 92 - Otodynamics. RESULTS: TOAE was present in the global response (A) and in frequency ranges of 1000, 1500, 2000 and 3000 Hz in 4 individuals (40%), and absent in 6 individuals (60%) with hearing loss. We observed no responses at 4000 Hz in the right and left ears. Individuals that presented global responses to TOAE also suppressed that response when there was noise. CONCLUSION: The suppression effect also occurs with TOAE, suggesting that the hearing loss is predominantly the result of cochlear dysfunction.