11th Speech in Noise Workshop, 10-11 January 2019, Ghent, BE

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Speech & background levels in a realistic sound environment

Naim Mansour(a), Marton Marschall
Hearing Systems, Dept. of Electrical Engineering, Technical University of Denmark, Denmark

Adam Westermann
Widex A/S, Denmark

Tobias May, Torsten Dau
Hearing Systems, Dept. of Electrical Engineering, Technical University of Denmark, Denmark

(a) Presenting

The use of realistic yet controlled sound scenarios for the evaluation of hearing-aid algorithms in a virtual sound environment (VSE) has the potential to positively impact the auditory quality of life of many hearing-impaired (HI) users. To do this in an ecologically valid way, these critical sound scenarios (CSS) need to be selected based on acoustic scenes that hearing-aid users experience as important through their difficulty and occurrence.

This study aims at selecting a set of appropriate CSSs based on results from literature and ecological momentary assessment (EMA) data, acquiring them in a real scene using a spherical microphone array, and reproducing them in an acoustically and perceptually valid way inside a VSE. A speech intelligibility task is implemented to obtain sound reception thresholds (SRT) for normal-hearing (NH) and hearing-impaired (HI) subjects and compare them to SRTs obtained with artificial background noise. In addition, a method for measuring in situ realistic speech levels between normal-hearing subjects is developed, and used to derive NH and HI speech intelligibility performance.

Last modified 2019-01-08 16:51:41