Performance Evaluation of the Cepstral Method to Estimate the Stable Optimal Solution of Feedforward Occlusion Cancellation in the Presence of Noise

EasyChair Preprint 9062

Abstract

This work aims to evaluate the performance of the cepstral method to estimate, in the presence of noise, the stable optimal solution of feedforward occlusion cancellation. Simu-lations showed that the efficiency of the method reduces when decreasing the signal-to-noise ratio (SNR) at the hearing aids external microphone. For an analysis window of 2s, estimates with mean normalized misalignment (MIS) less than -6, -14 and -22dB are obtained for SNRs of 30, 40 and 50dB, respectively. For a window of 4s, mean MIS less than -16 and -24dB are achieved for SNRs of 40 and 50dB, respectively. The results indicate that the calibration process, where the method is used, needs to be carried out in an acoustically controlled environment to maximize the accuracy of the stable solution estimate.

Keyphrases: Cepstral method, ambient noise, hearing aid, occlusion effect, optimal solution

@booklet{EasyChair:9062,
  author    = {Bruno Bispo and Renata Coelho Borges},
  title     = {Performance Evaluation of the Cepstral Method to Estimate the Stable Optimal Solution of Feedforward Occlusion Cancellation in the Presence of Noise},
  howpublished = {EasyChair Preprint 9062},
  year      = {EasyChair, 2022}}