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A Reduction Method of Reflected Waves for Investigation of Sound Source Location  

Jang Yun-Seok (Dept. of Electrical Engineering, Pukyong National University)
Publication Information
Journal of Biomedical Engineering Research / v.26, no.4, 2005 , pp. 251-255 More about this Journal
Abstract
When the extracorporeal shock wave lithotriptor is operated, sounds can be heard. Then that might be a question about the location where the sounds come from. For the purpose of investigating the fact, we identify the location of the sounds radiated using one hydrophone. In order to carry out the experiment, it is needed to obtain direct waves from objects. Therefore, we present an experimental method to reduce reflected waves for obtaining direct waves only. The experimental results show the amplitude of waves can be attenuated about 28dB due to a silicon rubber plate of 8.5mm attached at the bottom. This is a quantified result that can expect to obtain the direct waves using the proposed method. Then, we carried out the experiment for the sound source location. From the experimental results, we can undoubtedly present a fact that the sounds are radiated from the objects to be shot due to shock waves.
Keywords
ESWL; Reflected wave; Sounds radiated; Direct wave; Acoustic impedance; Sound location;
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1 Y. S. Jang, T. Akasaka, M. Sato, H. Kanai, and N. Chubachi, 'Measurement and Analysis of Vibrations on Surface of Phantom Induced by Piezoelectric Extracorporeal Shock Wave lithotriptor', Jpn. J. Appl. Phys., Vol. 35, No. 5B, pp. 3163-3166, 1996   DOI
2 A. R. Williams, M. Delius, D. L. Miller, and Schwarze, 'Investigation of Cavitation in Floating Media by lithotriptor Shock Waves Both In Vitro and In Vivo', Ultrasound Med. and Biol., Vol. 15, 1989
3 C. C. Church, 'A Theoretical Study of Cavitation Generated by an Extracorporeal Shock Wave lithotriptor', J. Acoust. Soc. America, Vol. 86, No.1, pp. 215-227, 1989   DOI   PUBMED
4 Y. S. Jang, 'Cavitation effects on radiated sounds and break efficiency induced by piezoelectric extracorporeal shock wave lithotriptor', Vol. 22, No.4, pp. 205-210, 2001
5 Ch. Chaussy and E. Schmidt, 'Shock wave treatment for stones in the upper urinery tract', The Urologic Clinics of North America, Vol. 10, No.4, pp. 743-750 1983
6 K. Takayama, 'Shogikiha no Ohanashi', Dingu, Tokyo, 1990
7 E. Heusler and W. Kiefer, 'Destruction of kidney stones by means of autofocused guided shock waves', In 2nd European Congo on Ultrasonics and Medicine, Munich, 1975
8 H. Asakage, Y. Asou, M. Tazaki, Y. Tanahashi, E. Higashigara, and M. Yokoyama, 'Shogekiha Kesseki Hasai no Subete', Toyo, Tokyo, 1991
9 N. G. Holmer, L. O. Almquist, T. G. Hertz, A. Holm, E. Linstedt, H. W. Persson, and C. H. Hertz, 'On the mechanism of kidney stone disintegration by acoustic shock waves', Ultrasound Med. & Biol. 17, 1991
10 G. C. Carter, 'Time delay estimation for passive sonar signal processing', IEEE Trans. Acoust. Speech Signal Processing, Vol. ASSP-29, No.3, pp. 463-470, 1981   DOI
11 P. R. Abraham and G. C. Carter, 'Estimation of source motion from time delay and time compression measurements', J. Acoust. Soc. Am., Vol. 67, No.3, pp. 830-832, 1980   DOI   ScienceOn
12 C. H. Knapp and G. C. Carter, 'The generalized correlation method for estimation of time delay', IEEE Trans. Acoust. Speech Signal Processing, Vol. ASSP-24, No.4, pp. 320-327, 1976
13 K. Kido et al, 'Kiso Onkyo Koqaku', Corona, Tokyo, 1990
14 N. Sanada, J. Ikeuchi, K. Takayama, and O. Onodera, 'Interaction of an Air Bubble with a Shock Wave Generated by a Microexplosion in Water', Proc. Int. Symp. on Cavitation, pp. 67-72, 1986
15 N. Ioritani, M. Kuwahara, K. Kambe, K. Taguchi, T. Saito, S. Shirai, S. Orikasa, K. Takayama, and P. A. Lush, 'Acoustic Cavitation Bubbles in the Kidney Induced by Focused Shock Waves', 17th Int. Sym. on Shock Waves and Shock Tubes, pp. 185-190, 1989
16 A. J. Coleman, J. E. Saunders, L. A. Crum, and M. Dyson, 'Acoustic Cavitation Generated by an Extracorporeal Shock Wave lithotriptor', Ultrasound in Med. and Biol., Vol. 13, No.2, pp. 69-76, 1978
17 H. Kanai, Y. S. Jang, N. Chubachi, and Y. Tanahashi, 'Power difference in spectrum of sound radiation before and after of phantom by piezoelectric extracorporeal shock wave lithotriptor', Jpn. J. Appl. Phys, Vol. 33-1, No. 5B, pp. 743-750, 1994