title: Prediction of intelligibility of non-linearly processed speech.
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 & Houtgast (6). 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.
authors.affiliation: Acoustics Laboratory, Technical University of Denmark, Lyngby.
authors.forename: C
authors.initials: C
authors.lastname: Ludvigsen
authors.forename: C
authors.initials: C
authors.lastname: Elberling
authors.forename: G
authors.initials: G
authors.lastname: Keidser
authors.forename: T
authors.initials: T
authors.lastname: Poulsen
mesh_terms: D006310:Hearing Aids; D012815:Signal Processing, Computer-Assisted; D013065:Speech Intelligibility; D013067:Speech Perception