Human Ability to Judge Relative Size and Lateral Position of a Sound Reflecting Board Using Click Signals: Influence of Source Position and Click Properties

Vos, H P J C De; Hornikx, Maarten

doi:10.3813/aaa.919153

Cited by 6 publications

(2 citation statements)

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“…A passive investigation of an active phenomenon. The discrimination performance with self-made tongue clicks in active echolocation experiments can be expected to follow the same trends as the ones observed here with passive echolocation, with some variability related to the spectral content of self-made clicks [15,39] and to forward masking of information on texture in reflections of self-made clicks being less harmful than with recorded clicks [53].…”

Section: Supporting Informationsupporting

confidence: 74%

“…In the first scenario, the Reflected-To-direct Level Difference (RDLD) [ 38 ] was enhanced by 6dB. Expectations were that making the reflection more audible compared to the direct sound would decrease the impact of forward masking and thus test persons would perform better at distinguishing walls with different reflecting properties [ 39 ]. For the sake of completeness, it can be mentioned that changing the RDLD also changes the distance perception of the reflecting object (cfr discussion on direct-to-reverberant ratio in Zahorik et al [ 40 ]).…”

Section: Methodsmentioning

confidence: 99%

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Discrimination of 2D wall textures by passive echolocation for different reflected-to-direct level difference configurations

et al. 2021

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In this work, we study people’s ability to discriminate between different 2D textures of walls by passive listening to a pre-recorded tongue click in an auralized echolocation scenario. In addition, the impact of artificially enhancing the early reflection magnitude by 6dB and of removing the direct component while equalizing the loudness was investigated. Listening test results for different textures, ranging from a flat wall to a staircase, were assessed using a 2 Alternative-Forced-Choice (2AFC) method, in which 14 sighted, untrained participants were indicating 2 equally perceived stimuli out of 3 presented stimuli. The average performance of the listening subjects to discriminate between different textures was found to be significantly higher for walls at 5m distance, without overlap between the reflected and direct sound, compared to the same walls at 0.8m distance. Enhancing the reflections as well as removing the direct sound were found to be beneficial to differentiate textures. This finding highlights the importance of forward masking in the discrimination process. The overall texture discriminability was found to be larger for the walls reflecting with a higher spectral coloration.

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Section: Supporting Informationsupporting

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Discrimination of 2D wall textures by passive echolocation for different reflected-to-direct level difference configurations

et al. 2021

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Effects of type of emission and masking sound, and their spatial correspondence, on blind and sighted people's ability to echolocate

Thaler,

Castillo-Serrano,

Kish

et al. 2024

Neuropsychologia

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System Quality of Human Physiological Signal Based Medical Auxiliary Diagnosis

Liu

Ling-Hui

2021

IEEE Access

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In order to improve the quality of mobile medical assistant diagnosis, this paper proposes the quality research of medical assistant diagnosis system based on human physiological signal. Firstly, the human physiological signal is preprocessed by wavelet transform, and the signal is decomposed and reconstructed. Then, the feature extraction method based on windowing is used to extract the peak valley feature of the hyperbolic pulse of the denoised signals. Iterative self-organizing data analysis method is used to classify the extracted signal features. In addition, by changing the parameters between and within clusters, updating the cluster center and cluster category, and splitting or merging them, the quality of medical auxiliary diagnosis is improved. In the experimental part, 80 patients in Department of cardiovascular medicine and Department of cardiovascular surgery of a hospital were selected as the experimental objects, and 80 physiological signals were collected. Compared with the maximum likelihood method and semantic knowledge base method, the experimental results show that this method improves the quality of traditional medical auxiliary diagnosis. The diagnostic accuracy rate is higher than 98.5%, and the diagnostic sensitivity is higher than 96.5%.

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Human Ability to Judge Relative Size and Lateral Position of a Sound Reflecting Board Using Click Signals: Influence of Source Position and Click Properties

Cited by 6 publications

References 0 publications

Discrimination of 2D wall textures by passive echolocation for different reflected-to-direct level difference configurations

Discrimination of 2D wall textures by passive echolocation for different reflected-to-direct level difference configurations

Effects of type of emission and masking sound, and their spatial correspondence, on blind and sighted people's ability to echolocate

System Quality of Human Physiological Signal Based Medical Auxiliary Diagnosis

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