Sound localization using hearing device HRTFs
* Presenting author
Limited abilities to localize sound sources and other reduced spatial hearing capabilities remain a largely unsolved issue in hearing devices like as hearing aids or hear-through headphones. There, the principal limitation is the acoustic directional information (characterized by the HRTF) that is captured at the microphone of the device. While previous studies showed that localization abilities are impaired when listening through hearing devices, effects of the biased HRTF at the device microphone in isolation have only been studied objectively by means of auditory models [Denk et al., 2018 JASA].We here present subjective results assessing the impact of the (biased) HRTF on sound localization with normal-hearing subjects. To this end, virtual stimuli were presented over headphones after convolution with HRTFs that were measured several different hearing devices and microphone positions in the individual subjects’ ears. We also assess the effects of delay between a direct sound component and the device output, a limited signal bandwidth, as well and the importance of individually measured HRTFs for achieving valid evaluation results.