Limitations of the Envelope Difference Index as a Metric for Nonlinear Distortion in Hearing Aids

Conclusions:
The accuracy of the EDI as an indicator of nonlinear distortion for sentence materials can be improved by equalizing the long-term spectrum of the processed signal to match that of the unprocessed input. However, the EDI does not have a clear interpretation because of the confound between linear and nonlinear processing effects and the lack of an auditory model in calculating the signal differences.

Source: Ear and Hearing - February 27, 2020 Category: Audiology Tags: Research Article Source Type: research