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Evaluation of combined dynamic compression and single channel noise reduction for hearing aid applications.
Int J Audiol. 2018 06; 57(sup3):S43-S54.IJ

Abstract

OBJECTIVE

Single-channel noise reduction (SCNR) and dynamic range compression (DRC) are important elements in hearing aids. Only relatively few studies have addressed interaction effects and typically used real hearing aids with limited knowledge about the integrated algorithms. Here the potential benefit of different combinations and integration of SCNR and DRC was systematically assessed.

DESIGN

Ten different systems combining SCNR and DRC were implemented, including five serial arrangements, a parallel and two multiplicative approaches. In an instrumental evaluation, signal-to-noise ratio (SNR) improvement and spectral contrast enhancement (SCE) were assessed. Quality ratings at 0 and +6 dB SNR, and speech reception thresholds (SRTs) in noise were measured using stationary and babble noise.

STUDY SAMPLE

Thirteen young normal-hearing (NH) listeners and 12 hearing-impaired (HI) listeners participated.

RESULTS

In line with an increased segmental SNR and spectral contrast compared to a serial concatenation, the parallel approach significantly reduced the perceived noise annoyance for both subject groups. The proposed multiplicative approaches could partly counteract increased speech distortions introduced by DRC and achieved the best overall quality for the HI listeners.

CONCLUSIONS

For high SNRs well above the individual SRT, the specific combination of SCNR and DRC is perceptually relevant and the integrative approaches were preferred.

Authors+Show Affiliations

a Medizinische Physik and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany and.a Medizinische Physik and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany and.b Speech Signal Processing and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany.a Medizinische Physik and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany and.a Medizinische Physik and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany and.a Medizinische Physik and Cluster of Excellence Hearing4all , Universität Oldenburg , Oldenburg , Germany and.

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

28355947

Citation

Kortlang, Steffen, et al. "Evaluation of Combined Dynamic Compression and Single Channel Noise Reduction for Hearing Aid Applications." International Journal of Audiology, vol. 57, no. sup3, 2018, pp. S43-S54.
Kortlang S, Chen Z, Gerkmann T, et al. Evaluation of combined dynamic compression and single channel noise reduction for hearing aid applications. Int J Audiol. 2018;57(sup3):S43-S54.
Kortlang, S., Chen, Z., Gerkmann, T., Kollmeier, B., Hohmann, V., & Ewert, S. D. (2018). Evaluation of combined dynamic compression and single channel noise reduction for hearing aid applications. International Journal of Audiology, 57(sup3), S43-S54. https://doi.org/10.1080/14992027.2017.1300695
Kortlang S, et al. Evaluation of Combined Dynamic Compression and Single Channel Noise Reduction for Hearing Aid Applications. Int J Audiol. 2018;57(sup3):S43-S54. PubMed PMID: 28355947.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of combined dynamic compression and single channel noise reduction for hearing aid applications. AU - Kortlang,Steffen, AU - Chen,Zhangli, AU - Gerkmann,Timo, AU - Kollmeier,Birger, AU - Hohmann,Volker, AU - Ewert,Stephan D, Y1 - 2017/03/30/ PY - 2017/3/31/pubmed PY - 2019/9/19/medline PY - 2017/3/31/entrez KW - Dynamic compression KW - hearing aids KW - hearing impairment KW - noise reduction KW - speech presence probability SP - S43 EP - S54 JF - International journal of audiology JO - Int J Audiol VL - 57 IS - sup3 N2 - OBJECTIVE: Single-channel noise reduction (SCNR) and dynamic range compression (DRC) are important elements in hearing aids. Only relatively few studies have addressed interaction effects and typically used real hearing aids with limited knowledge about the integrated algorithms. Here the potential benefit of different combinations and integration of SCNR and DRC was systematically assessed. DESIGN: Ten different systems combining SCNR and DRC were implemented, including five serial arrangements, a parallel and two multiplicative approaches. In an instrumental evaluation, signal-to-noise ratio (SNR) improvement and spectral contrast enhancement (SCE) were assessed. Quality ratings at 0 and +6 dB SNR, and speech reception thresholds (SRTs) in noise were measured using stationary and babble noise. STUDY SAMPLE: Thirteen young normal-hearing (NH) listeners and 12 hearing-impaired (HI) listeners participated. RESULTS: In line with an increased segmental SNR and spectral contrast compared to a serial concatenation, the parallel approach significantly reduced the perceived noise annoyance for both subject groups. The proposed multiplicative approaches could partly counteract increased speech distortions introduced by DRC and achieved the best overall quality for the HI listeners. CONCLUSIONS: For high SNRs well above the individual SRT, the specific combination of SCNR and DRC is perceptually relevant and the integrative approaches were preferred. SN - 1708-8186 UR - https://www.unboundmedicine.com/medline/citation/28355947/Evaluation_of_combined_dynamic_compression_and_single_channel_noise_reduction_for_hearing_aid_applications_ L2 - https://www.tandfonline.com/doi/full/10.1080/14992027.2017.1300695 DB - PRIME DP - Unbound Medicine ER -