Auditory brainstem responses for click and CE-chirp stimuli in individuals with and without occupational noise exposure

Auditory Brainstem Response (ABR) Findings With Click and CE-Chirp Stimulations in Noise-Exposed Participants

AUDITORY BRAINSTEM RESPONSES (ABR) IN HYPERBILIRUBINEMIC NEWBORNS

To evaluate the changes of ABR values in hyperbilirubinemic newborns, 85 cases with severe jaundice (total bilirubin levels over 16 mg/dL and direct bilirubin less than 2 mg/dL) were selected from those admitted to Children's Medical Center by simple sampling method. These infants had no other problem except jaundice. ABR was taken before treatment in all cases and in some (10 cases) after...

Comparison of click and CE-chirp stimuli on Brainstem Auditory Evoked Potential recording Comparação dos estímulos clique e CE-chirp no registro do Potencial Evocado Auditivo de Tronco Encefálico

Purpose: To compare the latencies and amplitudes of wave V on the Brainstem Auditory Evoked Potential (BAEP) recording obtained with click and CE-chirp stimuli and the presence or absence of waves I, III and V in high intensities. Methods: Cross-sectional study with 12 adults with audiometric thresholds ≤15 dBHL (24 ears) and mean age of 27 years. The parameters used for the recording with both...

Prevalence of tinnitus in elderly individuals with and without history of occupational noise exposure

INTRODUCTION  The various metabolic and circulatory alterations that are related to noise exposure may cause the onset of several symptoms, including tinnitus. OBJECTIVE  The purpose of the study was to assess the prevalence of tinnitus complaints in elderly individuals with and without history of occupational noise exposure. METHOD  This prospective study was conducted in a sample populati...

On chirp stimuli and neural synchrony in the suprathreshold auditory brainstem response.

The chirp-evoked ABR has been regarded as a more synchronous response than the click-evoked ABR, referring to the belief that the chirp stimulates lower-, mid-, and higher-frequency regions of the cochlea simultaneously. In this study a variety of tools were used to analyze the synchronicity of ABRs evoked by chirp- and click-stimuli at 40 dB HL in 32 normal hearing subjects aged 18 to 55 years...