Dipl.-Ing. (FH) Alexandra Winkler M. Sc., Oldenburg
Video 3 2018
“Freiburg monosyllabic speech test in noise”
According to the applicable guidelines for hearing aids, the Freiburg monosyllabic speech test can be used for evaluating hearing aid fitting in noise. Speech recognition must be improved by at least ten percentage points above measurement conducted without hearing aids. Information on the noise to be applied is missing in the guidelines. Therefore, this study focused on the impact of the selected noise and presentation mode of the noise on monosyllabic speech recognition. Measurements were conducted with listeners with normal hearing at various signal-to-noise ratios. Both noise and speech signals were presented from one loudspeaker located in front of the listener. CCITT noise, ICRA1 noise, a noise according to DIN 60645-2, and a speech-shaped noise developed from the speech material were chosen as noise signals. The results showed a significant impact of the noise on monosyllabic speech recognition. There was also a significant difference in speech recognition between continuously presented noise and noise presented only during word presentation. For comparisons of hearing aid measurements, information on the type of noise presented and the presentation mode is required.