Horizontal sound localisation accuracy in individuals with conductive hearing loss: effect of the bone conduction implant

Asp, Filip; Reinfeldt, Sabine

doi:10.1080/14992027.2018.1470337

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…The results from the ongoing clinical study have shown so far improved performance in basic tone and speech audiometry tests (Eeg-Olofsson et al 2014;Reinfeldt, Håkansson, Taghavi, Freden Jansson, et al 2015). The effect of the BCI during more complex tasks is currently under investigation, with focus on sound localisation in the study by Asp and Reinfeldt (2018), and on speech recognition in a multitalker cocktail party scenario in the current study.…”

Section: Introductionmentioning

confidence: 88%

The effect of an active transcutaneous bone conduction device on spatial release from masking

Rigato

Reinfeldt

Asp

2019

International Journal of Audiology

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Objective: The aim was to quantify the effect of the experimental active transcutaneous Bone Conduction Implant (BCI) on spatial release from masking (SRM) in subjects with bilateral or unilateral conductive and mixed hearing loss. Design: Measurements were performed in a sound booth with five loudspeakers at 0 , þ/À30 and þ/À150 azimuth. Target speech was presented frontally, and interfering speech from either the front (co-located) or surrounding (separated) loudspeakers. SRM was calculated as the difference between the separated and the co-located speech recognition threshold (SRT). Study Sample: Twelve patients (aged 22-76 years) unilaterally implanted with the BCI were included. Results: A positive SRM, reflecting a benefit of spatially separating interferers from target speech, existed for all subjects in unaided condition, and for nine subjects (75%) in aided condition. Aided SRM was lower compared to unaided in nine of the subjects. There was no difference in SRM between patients with bilateral and unilateral hearing loss. In aided situation, SRT improved only for patients with bilateral hearing loss. Conclusions: The BCI fitted unilaterally in patients with bilateral or unilateral conductive/mixed hearing loss seems to reduce SRM. However, data indicates that SRT is improved or maintained for patients with bilateral and unilateral hearing loss, respectively.

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Section: Introductionmentioning

confidence: 88%

The effect of an active transcutaneous bone conduction device on spatial release from masking

Rigato

Reinfeldt

Asp

2019

International Journal of Audiology

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“…These stimuli had long-term frequency spectra similar to the unmodulated noise used with the Hagerman Sentences, and thus similar to the spectrum of a female voice ( Hagerman 1982 ). One of these two stimuli was a musical melody ( Asp & Reinfeldt 2018 , 2020 ; Johansson et al 2019 ; Eklöf et al 2020 ) that minimized monaural level cues by naturally occurring amplitude modulations. The other broadband stimulus was a stationary noise, thus increasing the availability of monaural level cues compared with the musical melody.…”

Section: Methodsmentioning

confidence: 99%

“…The perceived auditory azimuth was defined as the median of the final 10 gaze/AoI intersection samples obtained during the 1.6-sec sound-only period, that is, a 500-msec sampling period. Sound localization accuracy was quantified by an error index (EI; Gardner & Gardner 1973;Asp et al 2011;Asp & Reinfeldt 2018) which was calculated as follows: where P is the set of loudspeakers (1 to 12), i = the presented loudspeaker (1 to 12), k = the perceived loudspeaker (1 to 12), and n = 12 (the number of loudspeakers). The EI ranged from 0 (perfect performance) to 1 (random performance).…”

Section: Test Proceduresmentioning

confidence: 99%

Differing Bilateral Benefits for Spatial Release From Masking and Sound Localization Accuracy Using Bone Conduction Devices

et al. 2022

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Objectives: Normal binaural hearing facilitates spatial hearing and therefore many everyday listening tasks, such as understanding speech against a backdrop of competing sounds originating from various locations, and localization of sounds. For stimulation with bone conduction hearing devices (BCD), used to alleviate conductive hearing losses, limited transcranial attenuation results in cross-stimulation so that both cochleae are stimulated from the position of the bone conduction transducer. As such, interaural time and level differences, hallmarks of binaural hearing, are unpredictable at the level of the inner ears. The aim of this study was to compare spatial hearing by unilateral and bilateral BCD stimulation in normal-hearing listeners with simulated bilateral conductive hearing loss.Design: Bilateral conductive hearing loss was reversibly induced in 25 subjects (mean age = 28.5 years) with air conduction and bone conduction (BC) pure-tone averages across 0.5, 1, 2, and 4 kHz (PTA 4 ) <5 dB HL. The mean (SD) PTA 4 for the simulated conductive hearing loss was 48.2 dB (3.8 dB). Subjects participated in a speech-in-speech task and a horizontal sound localization task in a within-subject repeated measures design (unilateral and bilateral bone conduction stimulation) using Baha 5 clinical sound processors on a softband. For the speech-inspeech task, the main outcome measure was the threshold for 40% correct speech recognition when masking speech and target speech were both colocated (0°) and spatially and symmetrically separated (target 0°, maskers ±30° and ±150°). Spatial release from masking was quantified as the difference between colocated and separated masking and target speech thresholds. For the localization task, the main outcome measure was the overall variance in localization accuracy quantified as an error index (0.0 = perfect performance; 1.0 = random performance). Four stimuli providing various spatial cues were used in the sound localization task. Results:The bilateral BCD benefit for recognition thresholds of speech in competing speech was statistically significant but small regardless if the masking speech signals were colocated with, or spatially and symmetrically separated from, the target speech. Spatial release from masking was identical for unilateral and bilateral conditions, and significantly different from zero. A distinct bilateral BCD sound localization benefit existed but varied in magnitude across stimuli. The smallest benefit occurred for a low-frequency stimulus (octave-filtered noise, CF = 0.5 kHz), and the largest benefit occurred for unmodulated broadband and narrowband (octave-filtered noise, CF = 4.0 kHz) stimuli. Sound localization by unilateral BCD was poor across stimuli. Conclusions:Results suggest that the well-known transcranial transmission of BC sound affects bilateral BCD benefits for spatial processing of sound in differing ways. Results further suggest that patients with bilateral conductive hearing loss and BC thresholds within the normal range may benefit from a b...

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Section: Methodsmentioning

confidence: 99%

“…Presentation order was randomized and children either verbally indicated the perceived sounding loudspeaker (which was labeled) or by pointing at it. Sound localization was quantified by an Error Index (Gardner & Gardner 1973;Asp & Reinfeldt 2018) ranging from 0 (perfect performance) to 1 (random performance). Spoken Language Abilities • Expressive vocabulary and naming ability were examined with the 60-item Boston Naming Test (BNT) in all children older than 4 years (Kaplan et al,Reference Note 3).…”

Section: Hearing and Listening Abilitymentioning

confidence: 99%

X-linked Malformation Deafness: Neurodevelopmental Symptoms Are Common in Children With IP3 Malformation and Mutation in POU3F4

et al. 2021

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Horizontal sound localisation accuracy in individuals with conductive hearing loss: effect of the bone conduction implant

Abstract: Individuals with mixed/conductive hearing loss may benefit from a unilateral BCI in sound localisation.

Cited by 9 publications

References 32 publications

The effect of an active transcutaneous bone conduction device on spatial release from masking

The effect of an active transcutaneous bone conduction device on spatial release from masking

Differing Bilateral Benefits for Spatial Release From Masking and Sound Localization Accuracy Using Bone Conduction Devices

X-linked Malformation Deafness: Neurodevelopmental Symptoms Are Common in Children With IP3 Malformation and Mutation in POU3F4

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