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Subjective Evaluation of Three Headphone-Based Virtual Sound Source Positioning Methods Including Differential Head-Related Transfer Function

Dominik Storek Frantisek Rund Petr Marsalek
Archives of Acoustics | 2016 | vol. 41 | No 3 | 437-447 | DOI: 10.1515/aoa-2016-0043
Keywords virtual positioning virtual reality positioning method positioning algorithm head-related transfer function amplitude panning
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Abstract

This paper analyses the performance of Differential Head-Related Transfer Function (DHRTF), an alternative transfer function for headphone-based virtual sound source positioning within a horizontal plane. This experimental one-channel function is used to reduce processing and avoid timbre affection while preserving signal features important for sound localisation. The use of positioning algorithm employing the DHRTF is compared to two other common positioning methods: amplitude panning and HRTF processing. Results of theoretical comparison and quality assessment of the methods by subjective listening tests are presented. The tests focus on distinctive aspects of the positioning methods: spatial impression, timbre affection, and loudness fluctuations. The results show that the DHRTF positioning method is applicable with very promising performance; it avoids perceptible channel coloration that occurs within the HRTF method, and it delivers spatial impression more successfully than the simple amplitude panning method.

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Authors and Affiliations

Dominik Storek
Frantisek Rund
Petr Marsalek

Research on the intelligent positioning method of tunnel excavation face

Jiesheng Zhang Yongzheng Qi
Archives of Civil Engineering | 2022 | vol. 68 | No 1 | 431-441 | DOI: 10.24425/ace.2022.140178
Keywords tunnel excavation face intelligent positioning method graphic data conversion
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Abstract

Tunnel construction survey must be necessary to be very quick so that the results can be known as soon as possible. This aim can be achieved through the intelligent positioning method of tunnel excavation face. In this study, the plane parameters of the tunnel cross-section were transformed into the coordinates of the points on the cross-section to realize the automatic transformation of graphic data. According to the theoretical calculation of the lofting point accuracy, the appropriate measurement control network level and measurement accuracy and the appropriate measurement instruments were selected. The fast and intelligent positioning and setting out of tunnel excavation face was realized base on the technology of data communication between computer and measuring instruments. The intelligent positioning method of tunnel excavation face could greatly reduce the time of measurement and positioning, speed up the project progress, reduce the project risk, shorten the construction period and reduce the project cost.
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Bibliography

[1] K. Rabensteiner, “Automated surveying speeds construction”, Tunnels & Tunnelling, 1996, vol. 28, no. 1, pp. 40–41.
[2] H.E. Bin, “Application of CASIO Measurement Program Assisted by Total Station in Survey of Tunnel Cross-Section”, Tunnel Construction, 2009, vol. 29, no. 1, pp. 120–122.
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[7] W.B. Luo, “The realization of real-time communication between mobile intelligent equipment and total station under net environment”, Surveying and mapping equipment, 2007, vol. 9, no. 4, pp. 42–43.
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[9] L.H. Luo, S.L. Wei, “Application of Surveying Robot in Pipe Jacking Crossing Subway Tunnel Project”, Jiangsu Construction, 2018, vol. 2018, no. 6, pp. 65–66.
[10] W. He, C. Song, B. Du, “Chinese Longest Sea-crossing Metro Tunnel: Wuyuan Bay Station-Liuwudian Station Section of Xiamen Metro Line 3”, Tunnel Construction, 2018, vol. 38, no. 3, pp. 501–505.
[11] Y.X. Hu, Y. Yue, H.D. Zhang, et al., “Application of Gyroscope in Directional Measurement of Long Distance Cross Sea Metro Tunnel”, Urban Geotechnical Investigation & Surveying, 2019, vol. 2019, no. 6, pp. 172–175.
[12] Y. Zhou, S. Wang, M. Xi, et al., “Railway Tunnel Clearance Inspection Method Based on 3D Point Cloud from Mobile Laser Scanning”, Sensors, 2017, vol. 17, no. 9, DOI: 10.3390/s17092055.
[13] W.Wei, “3D Laser scanning technique is applied to the measurement of tunnel section deformation”, Beijing Surveying and Mapping, 2020, vol. 34, no. 4, pp. 561–565.
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Authors and Affiliations

Jiesheng Zhang
1
ORCID: ORCID
Yongzheng Qi
2
ORCID: ORCID
  1. The First Engineering Co., LTD. of CTCE Group, No. 434 Fuyang North Road, Hefei 230041, China
  2. Jiangsu University of Science and Technology, School of Civil Engineering and Architecture, No. 2 Mengxi Road, Zhenjiang 212003, China

Study on the relationship between structure and properties of electro-hydraulic positioning actuators

Qiang Li Oleksandr Uzunov
Archive of Mechanical Engineering | 2024 | vol. 71 | No 1 | 87-107 | DOI: 10.24425/ame.2024.149186
Keywords electro-hydraulic positioning actuators property structure relationship positioning methods
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Abstract

In this work, a novel perspective is proposed to develop schematics solutions for electro-hydraulic positioning actuators. The basis of the design approach has been established, which includes: a set of possible desired properties of actuators; a series of defined typical positioning methods; variants of schematic structures; a quantitative assessment method for specific properties based on influencing factors; the quantitative relationship between the structure and properties of actuators, as well as the method for overall evaluation of the actuator's performance based on the total score. The results obtained can serve as the basis for an effective design approach, which allows for reducing the number of iteration cycles while developing new electro-hydraulic positioning actuator schematic solutions.
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Authors and Affiliations

Qiang Li
1
ORCID: ORCID
Oleksandr Uzunov
1
ORCID: ORCID
  1. Department of Fluid Mechanics and Mechatronics, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

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