Auditory steady-state evoked potentials at carrier frequencies above 4000 Hz

ABSTRACT

Introduction

The auditory steady-state evoked potentials (ASSEPs) has been identified as a promising technique for assessing hearing in patients who do not cooperate spontaneously in determining auditory thresholds. Although studies report decreased performance at carrier frequencies above 4000 Hz , technical advancements to determine its clinical utility is necessary because the use of these frequencies can contribute to a better audiological diagnosis.

Purpose

Aimed to analyze the general auditory steady-state response at carrier frequencies above 4000Hz.

Methods

Evaluation of ASSEPs combined and isolated at the intensities of 50 SLPpe and 80 SLPpe at the carrier frequencies 6000 Hz to 8000 Hz, with the signal acquisition and analysis system MASTER.

Results

Analysis of variance (two-way ANOVA), which found decreased amplitudes when related to the intensity and the stimulus conditions.

Conclusion

It was possible to evaluate the carrier frequencies 6000 Hz and 8000 Hz, either alone or combined. There were no interactions between the carrier frequencies 6000 Hz to 8000 Hz in both forms of presentation (combined and isolated) and intensity, for the sample.

Auditory evoked potentials; Hearing; Audiometry