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Publications - 6374

Representations of HRTFs using MATLAB: 2D and 3D plots of accurate dummy-head measurements

No authors available

Publication Name: 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society

Publication Date: 2010-12-01

Volume: 2

Issue:

Page Range: 1058-1066

Description:

Human Head-Related Transfer Functions describe the transmission from the free-field to the eardrums. HRTFs are measured on human subjects or on dummy-heads, characterized by the angle of incidence. The dummy-head measurement method allows the acquisition of data in high spatial resolution. Our setup provided HRTF data in 1 degree horizontal and 5 degrees elevational steps in different environmental settings. Spectral evaluation in spatial hearing research requires proper representation methods of detailed measurement data. Different 2D and 3D representation methods will be presented here, using different coordinate systems, color maps and additional filtering methods programmed under MATLAB. Figures are mainly helpful for HRTF analysis but MATLAB features allow other use for applications where directional characteristics, polar plots are required. Copyright© (2010) by the International Congress on Acoustics.

Open Access: No

DOI: DOI not available

Overview and comparative results of speech-based excitation signals for virtual localization and real-life applications

No authors available

Publication Name: 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society

Publication Date: 2010-12-01

Volume: 5

Issue:

Page Range: 3885-3889

Description:

In virtual audio synthesis we use different excitation signals for listening tests. These tests are executed using headphone playback and real-time HRTF synthesis. Besides noise signals, speech is often used for tests especially for real life applications, such as mobile phones, various voice transmission lines, computer environments or accessories for the visually impaired, where speech intelligibility is important. This paper presents a summary of results of a listening test using different signals including speech in a virtual audio environment aimed at blind persons. Results show how speech contributes to the accessibility to computers and performs in a comparative test for virtual audio simulation. Furthermore, additional speech test signals are overviewed and introduced, such as speech-chorus signals, segmented spondees and the newly developed spearcons.

Open Access: No

DOI: DOI not available

On the measurement and evaluation of bass enhanced in-ear phones

No authors available

Publication Name: 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society

Publication Date: 2010-12-01

Volume: 4

Issue:

Page Range: 2849-2854

Description:

Measurements of the transfer function of headphones and earphones are made on dummy-heads or on ear simulators. This paper introduces measurement problems of newly designed in-ear phones, often called as micro-driver equipment. These earphones have smaller transducer diameter and are equipped with rubber or spongy material to fit in the ear canal. This coupling may create an increased sound isolation, less sound pressure and a better low frequency transmission to the eardrum. The paper presents subjective evaluation of listeners who evaluated five different kinds of in-ear phones as well as transfer function measurements using a dummy-head. Measurement problems are highlighted pointing on new aspects of a revised dummy-head standard. Copyright © (2010) by the International Congress on Acoustics.

Open Access: No

DOI: DOI not available

Context recognition in mobile robots cooperation using fuzzy signature

No authors available

Publication Name: International Conference on Theoretical and Mathematical Foundations of Computer Science 2010, TMFCS 2010

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: 110-115

Description:

Robots cooperation means also to define the commune task. In order to understand their cooperation the robots must have complete knowledge about all possible states of the work or to understand the context by extract useful information from observation. Present paper focus on the second possibility. We propose a strategy of information extraction and context understanding based on an original data structure, the fuzzy signature and on a priori knowledge, the robot codebook. The paper starts by presenting the concept of the fuzzy signature and exemplify the idea of cooperation by context understanding.

Open Access: No

DOI: DOI not available

Torque Profile Optimization for Shell Eco-Marathon Urban Category Race †

Péter Korös Zoltan Pusztai

Publication Name: Engineering Proceedings

Publication Date: 2025-01-01

Volume: 113

Issue: 1

Page Range: Unknown

Description:

In this paper, we analyze the possibilities of optimizing the driving strategy for energy-efficient electric vehicles competing in the Shell Eco-marathon race. The base method we already developed and successfully applied for several years—winning the Urban Concept Battery Electric competition of the 2022, 2023, and 2024 Shell Eco-marathon races—was further tested, with small modifications to our optimization method. We only used an optimizer tool based on a genetic algorithm. We were interested in determining how a modification to the minimalization problem could help our optimizer find the best driving cycle to reach the minimum energy consumption. We successfully applied the modification to our method at the 2025 competition, where we beat our own record and proved its practical applicability.

Open Access: Yes

DOI: 10.3390/engproc2025113039

Assessment of soil erosion through spatial analyzing of soil properties using statistical-based functions

Narges Kariminejad Majid Movahedi Rad Vahid Shafaie

Publication Name: Bio Web of Conferences

Publication Date: 2024-08-23

Volume: 125

Issue: Unknown

Page Range: Unknown

Description:

The significant geomorphological hazard of collapsed cavities (CC) causes notable environmental transformations. To address this issue, the pipe collapse pattern was examined using two statistical methods, the Density Correlation Function (DCF) and the Mark Coloration Function (MCF). Key predictor variables like organic carbon (OC), sodium adsorption ratio (SAR), and exchangeable sodium percentage (ESP) were utilized to comprehend their impact on spatial distribution over time. The study was found that lower OC levels increase susceptibility to CC, while higher SAR and ESP amounts enhance the potential for collapsed cavities. The methodology and discoveries of this research can offer valuable insights for land managers, stakeholders, and researchers.

Open Access: Yes

DOI: 10.1051/bioconf/202412501008

Linearly priced timed automata for the bus schedule assignment problem

Máté Hegyháti Balazs David Miklos Kresz

Publication Name: Proceedings Gol 2018 4th IEEE International Conference on Logistics Operations Management

Publication Date: 2018-06-08

Volume: Unknown

Issue: Unknown

Page Range: 1-7

Description:

Papers dealing with optimization problems in public transportation usually follow the same methodology. The problem is modeled in a classical mathematical way, and then either solved directly using mathematical programming methods, or by the application of combinatorial heuristics. Even if this process yields an optimal solution, it might prove complicated to apply the achieved results directly in practice. In a transportation system, solutions for individual problems are only part of a more complex process, and they are often used only to aid experts in making decisions. However, the structure of the problem and the steps taken to achieve the solution are often lost in the solution process, while they might prove extremely useful to a human planner. This paper introduces a linearly priced timed automata model for the bus schedule assignment problem. With its help, the steps taken to achieve any feasible solution of the problem can be easily reconstructed, providing another tool for human experts to use in their decision planning process.

Open Access: Yes

DOI: 10.1109/GOL.2018.8378104

Application of LPV type force model in vehicle crash dynamics

No authors available

Publication Name: Proceedings of the 9th WSEAS International Conference on Applications of Computer Engineering, ACE '10

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: 174-179

Description:

In the research field of vehicle crash mechanics one of the most important task is finding a model for the deformational force, which gives acceptable approximation, but doesn't need perfect knowledge about the parameters of the vehicle. The FEM based methods, which are applied in the engineering practice give good approximations, but they have extremely large computational complexity and need a large amount of data. On the other hand there exist simple force models, but they not approximate well in details the force-deflection curve. In this paper we introduce a force model for vehicle deformation based on the LPV-HOSVD paradigm, which well approximates the force during the deformational process and has acceptable complexity.

Open Access: No

DOI: DOI not available

Hardware implementation of fuzzy flip-flops based on łukasiewicz norms

No authors available

Publication Name: Proceedings of the 9th WSEAS International Conference on Applied Computer and Applied Computational Science, ACACOS '10

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: 196-201

Description:

The digital hardware implementation of various fuzzy operations furthermore of fuzzy flip-flops has been the subject of intense study and application. The fuzzy D flip-flop derived from fuzzy J-K one is a single input - single output unit with sigmoid transfer characteristics in some particular cases, proper to use as neuron in a Fuzzy Neural Networks (FNN). In this paper we propose the hardware realization of fuzzy D flip-flops based on Łukasiewicz norms.

Open Access: No

DOI: DOI not available