Catherine van Dijk

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OBJECTIVE To date, the main direction in frequency-lowering hearing aid studies has been in relation to speech perception abilities. With improvements in hearing aid technology, interest in musical perception as a dimension that could improve hearing aid users' quality of life has grown. The purpose of this study was to determine the influence of non-linear(More)
OBJECTIVE To determine speech-perception-in-noise (with speech and noise spatially distinct and coincident) and bilateral spatial benefits of head-shadow effect, summation, squelch and spatial release of masking in adults with delayed sequential cochlear implants. STUDY DESIGN A cross-sectional one group post-test-only exploratory design was employed.(More)
The purpose of this research was twofold: firstly, to develop a music perception test (MPT) for hearing-aid users, and secondly, to evaluate the influence of non-linear frequency compression (NFC) on music perception with the use of the self-compiled test. This article focuses on the description of the development and validation of the MPT. To date, the(More)
Verifying the match to prescribed electro-acoustic performance is essential in a scientific approach to pediatric hearing instrument fittings. This study aimed to compare hearing instrument output values, at 65 and 90 dB sound-pressure level (SPL) input signals, of instruments fitted to pre-school children in South Africa to the targets prescribed by the(More)
Pure-tone testing is the primary audiological test procedure for the differential diagnosis of hearing loss and hearing disorders in school-aged children. No research is currently available internationally for children's responses to continuous versus pulsed pure-tones. The aim of this exploratory investigation was to compare the performance of a group of(More)
The main function of a cochlear implant is to optimise the auditory and communicative abilities of individuals with hearing loss. The use of a hearing aid in the non-implanted ear further optimises binaural hearing, which leads to improved sound localization, speech discrimination in noise and quiet surroundings, and refined sound quality. The goal of the(More)
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