Dynamic Range Limiting of HRTFs: Principle and Objective evaluation

Courtois, Gilles; Marmaroli, Patrick; Röhr, L.; al., et

doi:10.17743/jaes.2016.0023

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“…It rather means that the full binaural summation, which is achieved by conventional FM systems, can be slightly modified to incorporate the binaural cues corresponding to the position of the speaker, without lowering the speech intelligibility. Here, the passing from a diotic to a binaural rendering was operated cautiously, with the use of amplitude-limited HRTFs, so that the gain difference applied between both HAs never went over 20 dB (see Courtois et al., 2016 , for more detail).…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…To avoid excessive binaural gain differences that would reduce the benefits coming from the full binaural summation in conventional FM systems, some amplitude limitation was included in the spatial filters, so that the interaural gain difference reached 20 dB at most. This processing has been described and validated by Courtois et al (2016) on 38 NH listeners. Two French databases of speech content were used: the HINT database by the Colle`ge National d'Audioprothe`se ( 2006) for the intelligibility experiment and the SUS database by Raake and Katz (2006) for the localization experiment.…”

Section: Stimulimentioning

confidence: 99%

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Effects of Binaural Spatialization in Wireless Microphone Systems for Hearing Aids on Normal-Hearing and Hearing-Impaired Listeners

et al. 2018

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Little is known about the perception of artificial spatial hearing by hearing-impaired subjects. The purpose of this study was to investigate how listeners with hearing disorders perceived the effect of a spatialization feature designed for wireless microphone systems. Forty listeners took part in the experiments. They were arranged in four groups: normal-hearing, moderate, severe, and profound hearing loss. Their performance in terms of speech understanding and speaker localization was assessed with diotic and binaural stimuli. The results of the speech intelligibility experiment revealed that the subjects presenting a moderate or severe hearing impairment better understood speech with the spatialization feature. Thus, it was demonstrated that the conventional diotic binaural summation operated by current wireless systems can be transformed to reproduce the spatial cues required to localize the speaker, without any loss of intelligibility. The speaker localization experiment showed that a majority of the hearing-impaired listeners had similar performance with natural and artificial spatial hearing, contrary to the normal-hearing listeners. This suggests that certain subjects with hearing impairment preserve their localization abilities with approximated generic head-related transfer functions in the frontal horizontal plane.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Stimulimentioning

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