The effect of simulated unilateral hearing loss on horizontal sound localization accuracy and recognition of speech in spatially separate competing speech
| Autor: | Erik Berninger, Anne-Marie Jakobsson, Filip Asp |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Sound localization
Adult Male medicine.medical_specialty Audiology Hearing Loss Unilateral Speech Acoustics 03 medical and health sciences Young Adult 0302 clinical medicine otorhinolaryngologic diseases medicine Congenital sensorineural hearing loss Humans Sound Localization 030223 otorhinolaryngology Absolute threshold of hearing Speech Intelligibility Outcome measures Auditory Threshold Recognition Psychology medicine.disease Sensory Systems Persons With Hearing Impairments Acoustic Stimulation Speech Perception Audiometry Pure-Tone Female Unilateral hearing loss Psychology Audiometry Speech Noise Binaural recording Perceptual Masking 030217 neurology & neurosurgery |
| Zdroj: | Hearing research. 357 |
| ISSN: | 1878-5891 |
| Popis: | Unilateral hearing loss (UHL) occurs in 25% of cases of congenital sensorineural hearing loss. Due to the unilaterally reduced audibility associated with UHL, everyday demanding listening situations may be disrupted despite normal hearing in one ear. The aim of this study was to quantify acute changes in recognition of speech in spatially separate competing speech and sound localization accuracy, and relate those changes to two levels of temporary induced UHL (UHL30 and UHL43; suffixes denote the average hearing threshold across 0.5, 1, 2, and 4 kHz) for 8 normal-hearing adults. A within-subject repeated-measures design was used (normal binaural conditions, UHL30 and UHL43). The main outcome measures were the threshold for 40% correct speech recognition and the overall variance in sound localization accuracy quantified by an Error Index (0 = perfect performance, 1.0 = random performance). Distinct and statistically significant deterioration in speech recognition (2.0 dB increase in threshold, p 0.05), while sound localization was additionally impaired (Error Index increase of 0.33, p < 0.01) with an associated large increase in individual variability. Qualitative analyses on a subject-by-subject basis showed that high-frequency audibility was important for speech recognition, while low-frequency audibility was important for horizontal sound localization accuracy. While the data might not be entirely applicable to individuals with long-standing UHL, the results suggest a need for intervention for mild-to-moderate UHL. |
| Databáze: | OpenAIRE |
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