Designing new speech material
Multi-talker listening situations are known to be particularly problematic for hearing-impaired (HI) listeners. Consequently, competing-speech tests are needed for evaluating the effects of different hearing-aid fittings on speech recognition in such situations.
A few years ago, we developed a multi-talker speech corpus for this purpose, based on the closed-set Dantale-II speech material1. However, closed-set materials typically result in fairly low (negative) speech reception thresholds (SRTs). Together with the Centre for Applied Hearing Research at the Technical University of Denmark, we therefore developed an open-set, multi-talker speech corpus for measuring higher (and therefore arguably more realistic) SRTs.
The new material is inspired by the English TVM corpus,2 with a sentence template similar to “Name thought about the noun and the noun yesterday”. The name is used for cuing the target sentence, and the nouns are used for scoring purposes. Based on this template, we created about 800 unique sentences, which were deviced and then recorded with the help of three professional female talkers in a professional recording studio.