2024-03-29T13:21:32Z
http://ijet.pl/index.php/ijet/oai
oai:ojs.ijet.ise.pw.edu.pl:article/3677
2022-05-31T02:27:45Z
ijet:ACOUST
"220531 2022 eng "
2300-1933
dc
Estimation of asymmetry in Head Related Transfer Functions
Jasiński, Maciej
Warsaw Universiity of Technology, Institute of Radioelectronics and Multimedia Technology http://orcid.org/0000-0002-7826-4650
Żera, Jan
Warsaw Universiity of Technology, Institute of Radioelectronics and Multimedia Technology http://orcid.org/0000-0002-2175-6910
acoustics; sound processing; virtual reality; spatial sound; Head Related Transfer Functions;
The individual Head-Related Transfer Functions (HRTFs) typically show large left-right ear differences. This work evaluates HRTF left-right differences by means of the rms measure called the Root Mean Square Difference (RMSD). The RMSD was calculated for HRTFs measured with the participation of a group of 15 subjects in our laboratory, for the HRTFs taken from the LISTEN database and for the acoustic manikin. The results showed that the RMSD varies in relation to the frequency and as expected is small for more symmetrical HRTFs at low frequencies (0.3÷1 kHz). For higher frequency bands (1÷5 kHz and above 5 kHz), the left-right differences are higher as an effect of the complex filtering caused by anatomical shape of the head and the pinnae. Results obtained for the subjects and for data taken from the LISTEN database were similar, whereas different for the acoustic manikin. This means that measurements with the use of the manikin cannot be considered as perfect average representation of the results obtained for people. The method and results of this study may be useful in assessing the symmetry of the HRTFs, and further analysis and improvement of how to considered the HRTFs individualization and personalization algorithms.
Electronics and Telecommunications Committee
2022-05-31 04:23:29
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.139867
International Journal of Electronics and Telecommunications; Vol 68, No 2 (2022)
eng
http://ijet.pl/index.php/ijet/article/download/3677/11128
http://ijet.pl/index.php/ijet/article/download/3677/11129
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/203
2015-07-31T22:49:45Z
ijet:ACOUST
"150610 2015 eng "
2300-1933
dc
Change Point Determination in Audio Data Using Auditory Features
Mąka, Tomasz
Faculty of Computer Science and Information
Technology, West Pomeranian University of Technology
audio change point detection; auditory features; mfcc; gtead; bic;
The study is aimed to investigate the properties of auditory-based features for audio change point detection process. In the performed analysis, two popular techniques have been used: a metric-based approach and the BIC scheme. The efficiency of the change point detection process depends on the type and size of the feature space. Therefore, we have compared two auditory-based feature sets (MFCC and GTEAD) in both change point detection schemes. We have proposed a new technique based on multiscale analysis to determine the content change in the audio data. The comparison of the two typical change point detection techniques with two different feature spaces has been performed on the set of acoustical scenes with single change point. As the results show, the accuracy of the detected positions depends on the feature type, feature space dimensionality, detection technique and the type of audio data. In case of the BIC approach, the better accuracy has been obtained for MFCC feature space in the most cases. However, the change point detection with this feature results in a lower detection ratio in comparison to the GTEAD feature. Using the same criteria as for BIC, the proposed multiscale metric-based technique has been executed. In such case, the use of the GTEAD feature space has led to better accuracy. We have shown that the proposed multiscale change point detection scheme is competitive to the BIC scheme with the MFCC feature space.
Electronics and Telecommunications Committee
2015-06-17 18:00:55
application/pdf
http://ijet.pl/index.php/ijet/article/view/0.1515-eletel-2015-0024
International Journal of Electronics and Telecommunications; Vol 61, No 2 (2015)
eng
Copyright (c)
oai:ojs.ijet.ise.pw.edu.pl:article/744
2018-04-29T19:24:17Z
ijet:ACOUST
"170418 2017 eng "
2300-1933
dc
Analysis of the Photoacoustic Helmholtz Resonator with Conical-Ended Duct
Suchenek, Mariusz
Warsaw University of Technology WEITI, Institute of Electronic Systems
Acoustic; Acoustic Modeling;
Q-factor of photoacoustic Helmholtz cells can be improved by modification of the duct ends. The paper describes how mechanical modification of the duct ends affects the photoacoustic Helmholtz resonator. The cone profile of the duct ends was studied and, according to previous work, the linear modification of the cone parameter does not result in a linear increase of the resonator Q-factor and resonance frequency. The influence of the conical modification, cone length and angle was investigated using the computer simulations based on the stepped-approximated model.
Electronics and Telecommunications Committee
2017-04-18 16:24:06
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2017-0016
International Journal of Electronics and Telecommunications; Vol 63, No 2 (2017)
eng
Copyright (c) 2017 International Journal of Electronics and Telecommunications