Reducing Residual Noise Using the Intelligent Hearing Systems (IHS) and the Vivosonic Integrity Auditory Brainstem Response Devices

Abstract

Purpose: The purpose of this study was to determine the effectiveness and efficiency of the Intelligent Hearing Systems (IHS) (utilizing artifact rejection) and the Vivosonic Integrity (VIVO) (utilizing Kalman weighted averaging, the Amplitrode, and Bluetooth) in reducing residual noise. Method: Simultaneous ABR recordings were collected for 16 adults during both relaxed and active motor states. Residual noise (RN) measures obtained using artifact rejection as implemented on the IHS were compared to those obtained using Kalman weighted averaging, the Amplitrode, and Bluetooth technologies as implemented on the VIVO. Results: Average RN levels obtained by VIVO were lower than those obtained by the IHS in all conditions. With use of Kalman weighted averaging, the Amplitrode, and Bluetooth, 3 minutes of averaging for the relaxed condition and 6 minutes of averaging for the active conditions were needed in order to meet a criterion RN level of 0.025μV. Conclusions: The use of Kalman weighted averaging provides an advantage in both effectiveness and efficiency over traditional averaging and artifact rejection in reducing residual noise levels.