Influence of multi-microphone signal enhancement algorithms on auditory movement detection in acoustically complex situations
The influence of hearing aid (HA) signal processing on the perception of spatially dynamic sounds has not been systematically investigated so far. Previously, we observed that interfering sounds impaired the detectability of left-right source movements and reverberation that of near-far source movements for elderly hearing-impaired (EHI) listeners (Lundbeck et al., 2017). Here, we explored potential ways of improving these deficits with HAs. To that end, we carried out acoustic analyses to examine the impact of two beamforming algorithms and a binaural coherence-based noise reduction scheme on the cues underlying movement perception. While binaural cues remained mostly unchanged, there were greater monaural spectral changes and increases in signal-to-noise ratio and direct-to-reverberant sound ratio as a result of the applied processing. Based on these findings, we conducted a listening test with 20 EHI listeners. That is, we performed aided measurements of movement detectability in two acoustic scenarios. For both movement dimensions, we found that the applied processing could partly restore source movement detection in the presence of reverberation and interfering sounds.
Grimm, G., Herzke, T., Berg, D., and Hohmann, V. (2006). “The master hearing aid: a PC-based platform for algorithm development and evaluation,” Acta Acust United Ac., 92, 618-628.
Grimm, G., Hohmann, V., and Kollmeier, B. (2009). “Increase and subjective evaluation of feedback stability in hearing aids by a binaural coherence-based noise reduction scheme,” IEEE T. Audio Speech, 17, 1408-1419.
Grimm, G., Luberadzka, J., Herzke, T., and Hohmann, V. (2015). “Toolbox for acoustic scene creation and rendering (TASCAR)-Render methods and research applications,” Proceedings of the Linux Audio Conference, Mainz.
Hansen, M. (2006). “Lehre und Ausbildung in Psychoakustik mit psylab: Freie Software fur psychoakustische Experimente,” Fortschritte der Akustik, 32, 591.
Kaernbach, C. (1990). “A single‐interval adjustment‐matrix (SIAM) procedure for unbiased adaptive testing,” J. Acoust. Soc. Am., 88, 2645-2655.
Lundbeck, M., Grimm, G., Hohmann, V., Laugesen, S., and Neher, T. (2017). “Sensitivity to angular and radial source movements as a function of acoustic complexity in normal and impaired hearing,” Trends Hear., 21, 2331216517717152.
Moore, B.C., and Tan, C.-T. (2004). “Development and validation of a method for predicting the perceived naturalness of sounds subjected to spectral distortion,” J. Audio Eng. Soc., 52, 900-914.
Rohdenburg, T., Hohmann, V., and Kollmeier, B. (2007). “Robustness analysis of binaural hearing aid beamformer algorithms by means of objective perceptual quality measures,” in Applications of Signal Processing to Audio and Acoustics, 2007 IEEE Workshop on (IEEE), pp. 315-318.
Thiemann, J., and van de Par, S. (2015). “Multiple model high-spatial resolution HRTF measurements,” Proc. DAGA 2015.
Authors who publish with this journal agree to the following terms:
a. Authors retain copyright* and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
b. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
*From the 2017 issue onward. The Danavox Jubilee Foundation owns the copyright of all articles published in the 1969-2015 issues. However, authors are still allowed to share the work with an acknowledgement of the work's authorship and initial publication in this journal.