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@PHDTHESIS{Pausch:844220,
author = {Pausch, Florian},
othercontributors = {Fels, Janina and van Wieringen, Astrid},
title = {{S}patial audio reproduction for hearing aid research :
{S}ystem design, evaluation and application},
volume = {36},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Berlin},
publisher = {Logos Verlag GmbH},
reportid = {RWTH-2022-03745},
isbn = {978-3-8325-5461-3},
series = {Aachener Beiträge zur Akustik},
pages = {1 Online-Ressource : Illustrationen, Diagramme},
year = {2022},
note = {Druckausgabe: 2022. - Auch veröffentlicht auf dem
Publikationsserver der RWTH Aachen University; Dissertation,
RWTH Aachen University, 2021},
abstract = {Hearing loss (HL) has multifaceted negative consequences
for individuals of all age groups. Despite individual
fitting based on clinical assessment, consequent usage of
hearing aids (HAs) as a remedy is often discouraged due to
unsatisfactory HA performance. Consequently, the
methodological complexity in the development of HA
algorithms has been increased by employing virtual acoustic
environments which enable the simulation of indoor scenarios
with plausible room acoustics. Inspired by the research
question of how to make such environments accessible to HA
users while maintaining complete signal control, a novel
concept addressing combined perception via HAs and residual
hearing is proposed. The specific system implementations
employ a master HA and research HAs for aided signal
provision, and loudspeaker-based spatial audio methods for
external sound field reproduction. Systematic objective
evaluations led to recommendations of configurations for
reliable system operation, accounting for perceptual
aspects. The results from perceptual evaluations involving
adults with normal hearing revealed that the characteristics
of the used research HAs primarily affect sound localisation
performance, while allowing comparable egocentric auditory
distance estimates as observed when using loudspeaker-based
reproduction. To demonstrate the applicability of the
system, school-age children with HL fitted with research HAs
were tested for speech-in-noise perception in a virtual
classroom and achieved comparable speech reception
thresholds as a comparison group using commercial HAs, which
supports the validity of the HA simulation. The inability to
perform spatial unmasking of speech compared to their peers
with normal hearing implies that reverberation times of 0.4
s already have extensive disruptive effects on spatial
processing in children with HL. Collectively, the results
from evaluation and application indicate that the proposed
systems satisfy core criteria towards their use in HA
research.},
cin = {613610},
ddc = {621.3},
cid = {$I:(DE-82)613610_20201204$},
pnm = {ICARE - Improving Children's Auditory Rehabilitation
(607139)},
pid = {G:(EU-Grant)607139},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
doi = {10.18154/RWTH-2022-03745},
url = {https://publications.rwth-aachen.de/record/844220},
}
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