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Kalman Filter Based Estimation of Auditory Steady State Response Parameters.

Robert Luke, Jan Wouters

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society

|April 13, 2016

Summary

A new Kalman filter method significantly speeds up Auditory Steady State Response (ASSR) analysis for hearing threshold assessment. This advanced technique also improves measurements in cochlear implant patients.

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Area of Science:

Neuroscience
Audiology
Signal Processing

Background:

Auditory Steady State Responses (ASSRs) are objective EEG measures for hearing thresholds and auditory system sensitivity.
Current detection methods face challenges due to low signal-to-noise ratio and lengthy measurement times.
Accurate ASSR analysis is crucial for clinical audiology and understanding speech intelligibility.

Purpose of the Study:

To introduce a novel Kalman filter-based method for ASSR analysis.
To demonstrate the advantages of the Kalman filter approach over traditional Discrete Fourier Transform (DFT) methods.
To extend the Kalman filter method for enhanced electrode data integration and cochlear implant artifact handling.

Main Methods:

Development and application of a Kalman filter algorithm for ASSR detection.
Comparison of Kalman filter performance against established DFT methods using a dataset of 320 measurements.
Implementation of extensions to the Kalman filter model to incorporate multi-electrode data and cochlear implant stimulation artifacts.

Main Results:

The Kalman filter method achieved significantly faster valid amplitude estimates compared to the DFT method.
The extended Kalman filter successfully integrated information from multiple electrodes.
The method accurately measured electrically evoked auditory steady state responses (EASSRs) in the presence of cochlear implant artifacts.

Conclusions:

The Kalman filter-based approach offers a more efficient and robust method for ASSR analysis.
This technique has the potential to reduce clinical measurement time and improve diagnostic accuracy.
The extensions allow for more comprehensive auditory response assessment, including in cochlear implant users.