Prediction of intelligibility of non-linearly processed speech

C. Ludvigsen*, C. Elberling, G. Keidser, T. Poulsen

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Speech in various noise backgrounds was processed through four different non-linear devices and the intelligibility of the processed signals was predicted from the Speech Transmission Index (STI). A novel calculation method was applied in order to avoid artifacts. Running speech was used as input signal and STI was calculated from the envelopes of the squared, noise-free speech signal and of the processed, squared, noisy signal in 23 critical bands. In situations with linearly processed speech and a stationary background noise, this calculation method gives results identical with the procedure described by Steeneken and Houtgast. However, in a number of situations with non-linearly processed speech, or a time varying background noise level, the calculation method used here is preferable. The predictions were evaluated in a psycho-acoustic listening test and the predictions agreed well with the listening test results.

Original languageEnglish
Pages (from-to)190-195
Number of pages6
JournalActa Oto-Laryngologica, Supplement
Issue number469
Publication statusPublished - 1990
Externally publishedYes

Keywords

  • hearing aids
  • intelligibility
  • non-linearity
  • STI

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