Binaural model-based dynamic-range compression

Ernst, Stephan; Kortlang, Steffen; Grimm, Giso; Bisitz, Thomas; Kollmeier, Birger; Ewert, Stephan D.

doi:10.1080/14992027.2018.1425554

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Kreisman, Mazevski, Schum, and Sockalingam (2010) reported a significant improvement in speech understanding in noise (smaller SNR loss and lower receptive threshold for sentences) using hearing aids with wireless synchrony versus without synchrony. Ernst et al. (2018) also found a preference for linked compression on a paired comparison with independent compression.…”

Section: Discussionmentioning

confidence: 87%

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Improving Localization and Speech Reception in Noise for Bilateral Cochlear Implant Recipients

et al. 2019

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This study looked at different methods to preserve interaural level difference (ILD) cues for bilateral cochlear implant (BiCI) recipients. One possible distortion to ILD is from automatic gain control (AGC). Localization accuracy of BiCI recipients using default versus increased AGC threshold and linked AGCs versus independent AGCs was examined. In addition, speech reception in noise was assessed using linked versus independent AGCs and enabling and disabling Autosensitivity™ Control. Subjective information via a diary and questionnaire was also collected about maps with linked and independent AGCs during a take-home experience. Localization accuracy improved in the increased AGC threshold and the linked AGCs conditions. Increasing the AGC threshold resulted in a 4° improvement in root mean square error averaged across all speaker locations. Using linked AGCs, BiCI participants experienced an 8° improvement for all speaker locations and a 19° improvement at the speaker location most affected by the AGC. Speech reception threshold in noise improved by an average of 2.5 dB when using linked AGCs versus independent AGCs. In addition, the effect of linked AGCs on speech in noise was compared with that of Autosensitivity™ Control. The Speech, Spatial, and Qualities of Hearing Scale-12 question comparative survey showed an improvement when using maps with linked AGCs. These findings support the hypothesis that ILD cues may be preserved by increasing the AGC threshold or linking AGCs.

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Section: Discussionmentioning

confidence: 87%

“…Linked gains have been shown to improve ILDs for hearing aids. Ernst et al (2018) assessed ILDs for an independent compression versus a binaurally linked, model-based, fast-acting dynamic compression algorithm. ILD preservation for binaurally synchronized algorithms was better than for the independent compression.…”

Section: Discussionmentioning

confidence: 99%

Improving Localization and Speech Reception in Noise for Bilateral Cochlear Implant Recipients

et al. 2019

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“…In general terms, FAC has the effect of "flattening" ENV, whereas ENV is preserved by SAC (Figure 2) (150,159). FAC may therefore impair speech perception by changing the speech signal in a number of ways: distorting speech envelope cues; amplifying the noise in gaps, undermining gap detection; and reducing modulation detection that enables separation of individual speakers (150,(160)(161)(162)(163)(164)(165)(166). FAC might also impair sound localization based on interaural differences, although the evidence for this is weak (167).…”

Section: Compression Speedmentioning

confidence: 99%

A review of auditory processing and cognitive change during normal ageing, and the implications for setting hearing aids for older adults

2023

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Throughout our adult lives there is a decline in peripheral hearing, auditory processing and elements of cognition that support listening ability. Audiometry provides no information about the status of auditory processing and cognition, and older adults often struggle with complex listening situations, such as speech in noise perception, even if their peripheral hearing appears normal. Hearing aids can address some aspects of peripheral hearing impairment and improve signal-to-noise ratios. However, they cannot directly enhance central processes and may introduce distortion to sound that might act to undermine listening ability. This review paper highlights the need to consider the distortion introduced by hearing aids, specifically when considering normally-ageing older adults. We focus on patients with age-related hearing loss because they represent the vast majority of the population attending audiology clinics. We believe that it is important to recognize that the combination of peripheral and central, auditory and cognitive decline make older adults some of the most complex patients seen in audiology services, so they should not be treated as “standard” despite the high prevalence of age-related hearing loss. We argue that a primary concern should be to avoid hearing aid settings that introduce distortion to speech envelope cues, which is not a new concept. The primary cause of distortion is the speed and range of change to hearing aid amplification (i.e., compression). We argue that slow-acting compression should be considered as a default for some users and that other advanced features should be reconsidered as they may also introduce distortion that some users may not be able to tolerate. We discuss how this can be incorporated into a pragmatic approach to hearing aid fitting that does not require increased loading on audiology services.

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“…Otra diferencia fundamental es que la compresión en el audífono MOC no es instantánea, esto reduce la distorsión y acerca el funcionamiento al convencional en audífonos. Por otro lado, aunque BioAid mejora la audibilidad, el procesamiento temporal, y la selectividad frecuencial (Jürgens et al, 2016), no se han observado beneficios significativos en inteligibilidad frente al procesamiento ofrecido por un audífono bilateral comercial (Ernst et al, 2018). Por tanto, aunque el audífono MOC y BioAid parten de ideas similares; su diseño, funcionamiento y rendimiento en ruido es distinto.…”

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“…versión de BioAid, el procesamiento binaural de los sonidos se consigue promediando las señales de entrada al circuito DFAC de los dos compresores (uno por oído), de modo que la salida DFAC era idéntica en cada dispositivo por cada canal de frecuencia. No se observaron beneficios significativos de ninguno de los sistemas binaurales evaluados frente al procesamiento ofrecido por el uso de un audífono comercial convencional en cada oído (adaptación bilateral)(Ernst et al, 2018).…”

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Resumen de tesis. Un audífono binaural inspirado en el reflejo olivococlear medial contralateral

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Binaural model-based dynamic-range compression

Abstract: The suggested binaural synchronisation of compression algorithms showed a limited effect on the tested outcome measures, however, linking could be situationally beneficial to preserve a natural binaural perception of the acoustical environment.

Cited by 4 publications

References 25 publications

Improving Localization and Speech Reception in Noise for Bilateral Cochlear Implant Recipients

Improving Localization and Speech Reception in Noise for Bilateral Cochlear Implant Recipients

A review of auditory processing and cognitive change during normal ageing, and the implications for setting hearing aids for older adults

Resumen de tesis. Un audífono binaural inspirado en el reflejo olivococlear medial contralateral

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