Real Time Auralization Module for Electronic Travel Aid Devices for People with Visual Disability
Abstract
This paper presents a software module for real-timeauralization that was used to recreate the acoustic perceptionproduced by a sound obstacle in virtual and real environments.This module fulfills the function of inserting, in any audio signal,a three-dimensional positioning effect that allows the listenerto determine the location of a sound source within the chosentest environment. This effect was achieved with a processingtechnique called segmented convolution and several functionscontained in a database of head related impulse responses(HRIRs). The module was tested in a real environment anda virtual one. In the real test environment, the user had astereoscopic camera that fulfilled the function of an obstacledetector, as well as a computer and headphones, in which themodule was installed and three-dimensional sound alerts weregenerated. In this way, the effects could be recorded, analyzed,discussed and finally validated.
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References
P. Lee and D. Stewart, “Virtual reality (vr): a billion dollar nichetmt predictions 2016.” [Online]. Available: https://www2.deloitte.com/global/en/pages/technology-media-and-telecommunications/articles/tmt-pred16-media-virtual-reality-billion-dollar-niche.html
K. Mendel, B.-I. Dalenb ̈ack, and P. Svensson, “Auralization – anoverview,”J. Audio Eng. Soc. 41, p. 861, 1993.
M. Vorl ̈ander,Fundamentals of Acoustics, Modelling, Simulation, Algo-rithms and Acoustic Virtual Reality. Springer, 2008.
J. F. Lucio Naranjo, R. Tenenbaum, L. A. Paz Arias, H. P. Morales Esco-bar, and I. J. Iniguez Jarr ́ın, “3d sound applied to the design of assistednavigation devices for the visually impaired,”Latin-American Journalof Computing, 2015.
I. Lengua, D. Larisa, G. Peris, and B. Defez, “Dispositivo denavegaci ́on para personas invidentes basado en la tecnolog ́ıa time offlight.” [Online]. Available: http://www.scielo.org.co/scielo.php?script=sciarttext&pid=S0012-73532013000300004
R.Bencina,“Real-timeaudioprogramming101:timewaitsfor nothing.” [Online]. Available: http://www.rossbencina.com/code/real-time-audio-programming-101-time-waits-for-nothing
G. Alonso, L. Budde, and M. Zannier, “Síntesis de respuesta impulsiva de recintos a través del método de trazado de rayos,”UTN FRC - DeptoIng. Electrónica, 2012.
F.Pishdadian,“Filters,Reverberation&Convolution,”2017.[Online]. Available: http://www.cs.northwestern.edu/∼pardo/courses/eecs352/lectures/MPM16-topic9-Filtering.pdf
B. Gartner and K. Martin, “HRTF Measurements of a KEMARDummy-Head Microphone.” [Online]. Available: http://sound.media.mit.edu/resources/KEMAR.html
Ref.?, p. 28.
T.Wo ́zniak,“Implementing Binaural (HRTF) Panner Node with Web Audio API, ”April2015. [Online]. Available: https://codeandsound.wordpress.com/2015/04/08/implementing-binaural-hrtf-panner-node-with-web-audio-api/
S. Spors, “Segmented Convolution—DigitalSignalProcessing 0.0 documentation.” [Online]. Available: http://dsp-nbsphinx.readthedocs.io/en/nbsphinx-experiment/nonrecursivefilters/segmentedconvolution.html
S. Smith, “FFT Convolution.” [Online]. Available: http://www.dspguide.com/ch18/2.htm
G. Wersnyi, “Effect of emulated head-tracking for reducing localizationerrors in virtual audio simulation,”IEEE Transactions On Audio, Speech,And Language Processing, vol. 17, no. 2, pp. 247–252, 2009.
T. M ̈oller and B. Trumbore, “Fast, Minimum Storage Ray/TriangleIntersection,” inACM SIGGRAPH 2005 Courses, ser. SIGGRAPH’05.New York, NY, USA: ACM, 2005. [Online]. Available:http://doi.acm.org/10.1145/1198555.1198746
Ref.?, p. 98.
T. C. R. Network, “Cplusplus reference ¡atomic¿.” [Online]. Available:http://www.cplusplus.com/reference/atomic/
G. Held,Server Management. CRC Press, 2000.
F. Torres, P. Pomares, J.and Gil, and S. Puente,Robots y SistemasSensoriales. Prentice Hall, 2002.
P. Corke,Robotics, Vision and control. Springer, 2013.
T. C. R. Network, “About - point cloud library (pcl).” [Online].Available: http://pointclouds.org/about/
B. Li, X. Zhang, Munoz, X. J. P., X. J., Rong, and Y. Tian, “Assistingblind people to avoid obstacles: An wearable obstacle stereo feedbacksystem based on 3d detection,”IEEE International Conference onRobotics and Biomimetics, 2016.
A. Garcia, “Towards a real-time 3d object recognition pipeline onmobile gpgpu computing platforms using low-cost rgb-d sensors,”ser. CEUR Workshop Proceedings, 2015. [Online]. Available: https://doi.org/10.1017/CBO9781107415324.004
A. Nguyen and B. Le, “3d point cloud segmentation: A survey,” ser.IEEE Conference on Robotics, Automation and Mechatronics, 2013.[Online]. Available: https://doi.org/10.1109/RAM.2013.6758588
V. R. Algazi, R. O. Duda, D. M. Thompson, and C. Avendano, “Thecipic hrtf database.” [Online]. Available: https://bit.ly/3JtsBrI
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