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Eliciting naturalistic conversations: a method for assessing communication ability, subjective experience, and the impacts of noise and hearing impairment
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A Dynamic speech comprehension test for assessing real-world listening ability
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An Assessment of different sized open plan and enclosed kindergarten classroom listening environments
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Effect of audibility on spatial release from speech-on-speech masking
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An Investigation into the acoustics of an open plan compared to enclosed Kindergarten classroom
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Factors influencing target detectability in realistic listening scenarios
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Release from masking through spatial separation in distance in hearing impaired listeners
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Psychometric effects of adding realism to a speech-in-noise test
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Objective analysis of higher-order Ambisonics sound-field reproduction for hearing aid applications
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Abstract:
The evaluation of hearing aids (HAs) inside realistic sound environments is of increasing interest. Higher-order Ambisonics (HOA) has been used for loudspeaker-based sound field resynthesis and HOA recording microphone arrays are available. Although HOA has been evaluated perceptually, it is unclear how far the results can be transferred to evaluating HA technologies (particularly multi-microphone enhancement algorithms). In order to determine the minimum HOA order required for HA testing, an HOA framework was developed, simulating the entire path from sound presented in a room, picked up by a microphone array, decoded and received at the ears of a HA-fitted dummy head. HA directivity patterns were compared between an ideal free-field and its HOA representation to evaluate the introduced error. In-room analysis was conducted to investigate the bandwidth and performance of a directional microphone in realistic situations. For a bandwidth B, the required order was found to be M≥B/600Hz for the anechoic (worst) case scenario. The presence of reverberation introduced natural room response variations across different source-receiver locations, suggesting that the acceptable HOA error can be increased. Hence, in reverberant environments the required HOA order is reduced and at least 2D HOA reproduction can be used for evaluation of HA technologies. ; 9 page(s)
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URL: http://hdl.handle.net/1959.14/284465
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Validation of a loudspeaker-based room auralization system using speech intelligibility measures
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