TSUCHIYA Takao

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Name
TSUCHIYA Takao
Affiliation
Doshisha University
Section
Faculty of Science and Engineering Department of Information Systems Design
Job title
Professor
Degree
Doctor of Engineering(Doshisha University), Master of Engineering(Doshisha University)

Research Areas

 
 

Education

 
 
 - 
1989
Graduate School, Division of Engineering, Doshisha University
 
 
 - 
1986
Graduate School, Division of Engineering, Doshisha University
 
 
 - 
1984
Faculty of Engineering, Doshisha University
 

Committee Memberships

 
2013
   
 
Acoustical Society of Japan  
 

Awards & Honors

 
2007
Acoustical Imaging 29 Poster Award
 

Published Papers

 
Sound field renderer with loudspeaker array using real-time convolver
T. Tsuchiya, I. Takenuki and K. Sugiura
AES2018      Aug 2018   [Refereed]
T. Yiyu, Y. Inoguchi, M. Otani, Y. Iwaya and T. Tsuchiya
Appl. Sci   35(8)    2018   [Refereed]
Three-dimensional compact explicit-finite difference time domain scheme with density variation
T. Tsuchiya and N. Maruta
Jpn. J. Appl. Phys.   57 07LC01   2018   [Refereed]
M. Otani, H. Watabe, T. Tsuchiya and Y. Iwaya
Acoust. Sci. and Tech.   38(3) 147-153   2017   [Refereed]
Y. Matsumura, K. Okubo, N. Tagawa, T. Tsuchiya and T. Ishizuka
Acoust. Sci. and Tech.   38(1) 31-34   2017   [Refereed]
Reflective boundary condition with arbitrary boundary shape for compact-explicit finite-difference time-domain method
O. Yamashita, T. Tsuchiya, Y. Iwaya, M. Otani, and Y. Inoguchi
Jpn. J. Appl. Phys.   54 07HC002   2015   [Refereed]
M. Otani, H. Watabe, T. Tsuchiya, and Y. Iwaya
Acoust. Sci. and Tech.   36(4) 362-365   2015   [Refereed]
N. Kawada, K. Okubo, T. Tsuchiya , N. Tagawa and T. Ishizuka
Acoust. Sci. and Tech.   36(3) 268-270   2015   [Refereed]
N. Kawada, K. Okubo, N. Tagawa and T. Tsuchiya
Acoust. Sci. and Tech.   36(3) 265-267   2015   [Refereed]
T. Yiyu, Y. Inoguchi, Y. Sato, M. Otani, Y. Iwaya, H. Matsuoka, and T. Tsuchiya
Jpn. J. Appl. Phys.   53 07KC14   2014   [Refereed]
T. Yiyu, Y. Inoguchi, Y. Sato, M. Otani, Yukio Iwaya, Takao Tsuchiya
J. Microprocessors and Microsystems   38 216-225   2014   [Refereed]
J. Adachi, K. Okubo, N. Tagawa, T. Tsuchiya, and T. Ishizuka
Jpn. J. Appl. Phys.   52 07HG05-1-3   2013   [Refereed]
T. Ishii, T. Tsuchiya, and K. Okubo
Jpn. J. Appl. Phys.   52 07HC11-1-7   2013   [Refereed]
K. Kuroda, S. Sakamoto, K. Shibata, Y. Nakano, T. Tsuchiya, and Y. Watanabe
Jpn. J. Appl. Phys.   52 07GE01-1-5   2013   [Refereed]
T. Tsuchiya
Jpn. J. Appl. Phys.   51 07GB02-1-5   2012   [Refereed]
CUDAとOpenGLを用いたマルチGPUによる電磁界数値シミュレーションの高速可視化
河田直紀,大久保 寛,田川憲男,土屋隆生
電子情報通信学会誌   J95-B(2) 375-280   2012   [Refereed]

Misc

 
T. Tsuchiya
Jpn., J. Appl. Phys.   52 07HC03   2013
An Evaluation Method of Calculation Perforrnance for Acoustic Field Sirnulation Using a Graphic Processing Unit (GPU)
J. Jpn. Soc. Simul. Tech.   27(4) 245-254   2008

Books etc

 
On the Passive Vibration Damping by Piezoelectric Transducers with Inductive Loading
Systems Modeling and Simulation: Theory and Applications, Springer, LNAI 3398   2004   

Conference Activities & Talks

 
Numerical analysis of linear wave propagation in the atmosphere with temperature gradient for Mach cutoff reproduction
Takao Tsuchiya, Masashi Kanamori, Takashi Takahashi
日本音響学会2018年度秋季研究発表会,1-8-10   12 Sep 2018   日本音響学会
Perceptual optimization of sound field reproduction system and sound field rendering with software/hardware-based acoustic simulation.
M. Otani, T. Tsuchiya, Y. Iwaya, and Y. Inoguchi
ASA and ASJ 5th Joint Meeting   Dec 2016   
Evaluation of dependence on calculation parameters in interface settings for finite-difference time-domain analyses of acoustic fields
C. Ogawa, K. Okubo, and T. Tsuchiya
ASA and ASJ 5th Joint Meeting   Dec 2016   
Multi-dimensional numerical simulation of sound propagation with background flow using constrained interpolation profile method
K. Okubo, T. Oshima, T. Tsuchiya, and M. Kanamori
ASA and ASJ 5th Joint Meeting   Dec 2016   
A novel numerical simulation of acoustic Doppler effect using CIP-MOC method
T. Sonobe, K. Okubo, N. Tagawa and T. Tsuchiya
ASA and ASJ 5th Joint Meeting   Dec 2016   
Three-dimensional numerical simulation of parametric speaker by compact explicit finite-difference time-domain method
T. Tsuchiya, and H. Nomura
ASA and ASJ 5th Joint Meeting   Dec 2016   
Development of a high presence virtual reality system by binaural sound field rendering with head mount display
K. Sugiura, S. Iino, and T. Tsuchiya
ASA and ASJ 5th Joint Meeting   Dec 2016   
Discrimination of virtual sound fields different in spatial aliasing
Y. Iwaya, M. Otani, and T. Tsuchiya
ASA and ASJ 5th Joint Meeting   Dec 2016   
Design of a real-time sound field rendering processor
T. Yiyu, Y. Inoguchi, M. Otani, Y. Iwaya, and Takao Tsuchiya
RISP Int. Workshop Nonlinear Circuits, Comm. and Signal Processing 2016   Mar 2016   
Virtual Auditory Display on a Smartphone for High-Resolution Acoustic Space by Remote Rendering
Y. Iwaya, M. Otani, T. Tsuchiya and J. Li
11th Int. Conf. Intelligent Info. Hiding and Multimedia Signal Proc., IIH-MSP 2015   Sep 2015   
Perception of acoustical spatial attributes and impression in virtually rendered sound field
Y. Iwaya, M. Otani, T. Tsichiya and Y. Inoguchi
22th Int. Cong. Sound & Vib.   Jul 2015   
Impact of discretization spacing on reproduction accuracy in wave field synthesis
M. Otani, H. Watabe, T. Tsuchiya, and Y. Iwaya
22th Int. Cong. Sound & Vib.   Jul 2015   
Binaural synthesis of virtual acoustic field by numerous-channel reproduction
M. Otani, T. Tsuchiya and Y. Iwaya
Three-Dimensional Systems and Applications Conference (3DSA2014)_   Sep 2014   
Sound localization in surrounding loudspeaker array with spatial aliasing
Y. Iwaya, T.Tsuchiya and M. Otani
Three-Dimensional Systems and Applications Conference (3DSA2014)_   Sep 2014   
Virtual Auditory Display by Remote Rendering via Computer Networ
Y. Iwaya, M. Otani and T. Tsuchiya
10th Int. Conf. Intelligent Info. Hiding and Multimedia Signal Proc., IIH-MSP 2014   Aug 2014   
Subjective Evaluation of High-definition Virtual Sound Field using a 157-channel Surrounding Loudspeaker Arr
Y. Iwaya and T. Tsuchiya
9th Int. Conf. Intelligent Info. Hiding and Multimedia Signal Proc., IIH-MSP 2013   Oct 2013   
Large-Scale Sound Field Rendering in Rectangular room with Specular Reflection
T. Tsuchiya and O. Yamashita
20th Int. Conf. Sound & Vib.   Jul 2013   
Large-scale sound field rendering with graphics processing unit cluster for three-dimensional audio with loudspeaker array
T. Tsuchiya, Y. Iwaya and M. Otani
Int. Conf. Acoustics 2013   Jun 2013   
GPU Computing-Based High-Speed Visualization Techniquws for Numerical Simulation of Sound Wave Propagation
N. Kawada, K. Okubo, N. Tagaewa and T.Tsuchiya
32nd Int. Acoustical Imaging Sympo.   Apr 2013   
Three-dimensional sound field analysis using compact explicit FDTD method with GPU cluster system
T. Ishii, T. Tsuchiya, and K. Okubo
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
Accuracy Evaluation of Boundary Interface in Sound Field Simulation Using High-order FDTD Methods
T. Yoda, K. Okubo, N. Tagawa, and T. Tsuchiya
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
A Hardware-oriented FDTD Algorithm for Sound Field Rendering
T. Yiyu, Y. Inoguchi, Y. Sato, M. Otani, Y. Iwaya, H. Matsuoka, and T. Tsuchiya
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
Numerical simulation of a thermoacoustic engine _Effects of gas mixture on the onset temperature ratio _
Y. Nakano, S. Sakamoto, K. Shibata, K. Yanagimoto, T. Tsuchiya, and Y. Watanabe
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
Sub-grid Technique for Numerical Simulation of Sound Wave Propagation Combining Constrained Interpolation Profile Schemes
Y. Ara, K. Okubo, N. Tagawa, T. Tsuchiya, and T. Ishizuka
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
Examination on Absorbing Boundary Condition Using Method of Characteristics on Collocated Orthogonal Grid
J. Adachi, K. Okubo, N. Tagawa, and T. Tsuchiya
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
GPGPU Based High-speed Visualization Techniques for Sound Wave Propagation
N. Kawada, K. Okubo, N. Tagawa, and T. Tsuchiya
33 th. Sympo. on Ultrasonic Electron.,   Nov 2012   
Large-Scale Sound Field Rendering by GPU Cluster with Multi-Speaker Reproduction System
T. Tsuchiya, T. Ishii and Y. Hasuike
19th Int. Conf. Sound & Vib.   Jul 2012   
Direct In Situ Measurements of Sound Speed and Water Temperature Profiles The Example of North Lake Biwa
T. Kimura, T. Tsuchiya, Y. Watanabe and S. Sakamoto
SICE Annual Conf. 2011   Sep 2011   
_DHM AND FDTD BASED _b0HARDWARE SOUND FIELD _b0SIMULATION _b0ACCELERATION _b0
Y. Inoguchi, T. Yiyu, Y. Sato, Y. Iwaya, H. Matsuoka, M. Otani, and T. Tsuchiya
14th Int. Conf. Digital Audio Effects   Sep 2011   
A High Performance Numerical Simulation of Sound Field in Time Domain Using a GPU Cluster System
T. Tsuchiya, A. Moriguchi and T. Ishii
Forum Acusticum 2011   Jul 2011   
A FPGA Implementation of the Two-Dimensional Digital Huygens’ Model
T. Yiyu, Y. Sato, E. Sugawara, Y. Inoguchi, M. Otani, Y. Iwaya, H. Matsuoka and T. Tsuchiya
2010 Int. Conf. Field-Programmable Tech.   Dec 2010   
Sound field rendering with digital boundary cond
T. Tsuchiya and M. Otsuka
Inter noise 2010   Jun 2010   
Numerical Simulation of Sound Wave Propagation Using Hybrid Technique Combining FDTD Method and CIP Method
M. Ohmiya, K, Okubo, T. Tsuchiya and N. Tagawa
2009 IEEE lnternational Ultrasonics Symposium   Sep 2009   
A Novel Method for Numerical Simulation of Sound Wave Propagation Using Heptic Interpolation Profi le Method
K. Okubo, T. Tsuchiya, R. Seta, andN. Tagawa
2009 IEEE lnternational Ultrasonics Symposium   Sep 2009   
A High-Performance Numerical Simulation of Sound Field in Time Domain Using Multi-GPU System
T. Tsuchiya and M. Otsuka
16th Int. Cong. on Sound and Vib.   Jul 2009   
Numerical Simulation of Sound Field in Time Domain Using a Combination of FDTD method and Boundary Integral Equation Method
T. Tsuchiya and A. Kumagai
The 29h Sympo. on Ultrason. Electron. (USE2008)   Nov 2008   
Two Dimensional Simulation of Nonlinear Acoustic Wave Propagation Using Constrained Interpolation Profile Method
M. Konno, K. Okubo, T. Tsuchiya and N. Tagawa
The 29h Sympo. on Ultrason. Electron. (USE2008)   Nov 2008   
Design for High-Accurate Numerical Simulation of Acoustic Field in Time Domain Using Finite Difference Time Domain Method and Pseudospectral Time Domain Method
K. Okubo, M. Omiya, T. Tsuchiya and N. Tagawa
The 29h Sympo. on Ultrason. Electron. (USE2008)   Nov 2008   
Performance Comparison between Some Types of CIP Analysis for Acoustic Wave Propagation
M. Konno, K. Okubo, T. Tsuchiya and N. Tagawa,
28th Sympo. on Ultrason. Electron. (USE2007)   Nov 2007   
Numerical Simulation of Nonlinear Sound Wave Propagation Using CIP Method −One dimensional case−
T. Tsuchiya, K. Okubo and N. Takeuchi
28th Sympo. on Ultrason. Electron. (USE2007)   Nov 2007   
Numerical Simulation of Nonlinear Sound Wave Propagation Using CIP Method
T. Tsuchiya, K. Okubo and N. Takeuchi
14th Int. Cong. on Sound and Vib   Jul 2007   
Two-Dimensional Numerical Analysis of Acoustic Field Using the Constrained Interpolation Profile Method
S. Oh, K. Okubo, T.Tsuchiya and N. Takeuchi
29th. Int. Sympo. Acoustical Imaging   Apr 2007   
Real Time Sound Field Simulator Using Field Programmable Gate Array Device
T. Tsuchiya, E. Sugawara and Y. Inoguchi
29th. Int. Sympo. Acoustical Imaging   Apr 2007   
On the Numerical Simulation of Sound Wave Propagation using Field Programmable Gate Array Device
T. Tsuchiya, E. Sugawara and Y. Inoguchi
ASA and ASJ Fourth Joint Meeting   Dec 2006   
Numerical Simulation of Sound Wave Propagation with Sound Absorption by Digital Huygens' Model
T. Tsuchiya
27th Sympo. on Ultrason. Electron.   Nov 2006   
Numerical Simulation of Sound Wave Propagation with Sound Absorption in Time Domain
T. Tsuchiya
13th Int. Cong. on Sound and Vib.   Jul 2006   
On the Active Vibration Control by Piezoelectric Transducers
T. Tsuchiya
the 6th Int. Conf. on System Simulation and Scientific Computing   2005   
On the Passive Vibration Damping by Piezoelectric Transducers with Inductive Loading
T. Tsuchiya and Y. Kagawa
Int. Simul. Multi Conf./AsiaSim 2004   Oct 2004   
On the Passive Vibration Damping with Electromechanical Transducers
T.Tsuchiya and Y.Kagawa
The 18th Int. Cong. on Acoust   Apr 2004   
Finite Element Based Equivalent Circuit Modeling for Piezoelectric Vibratory Systems
T.Tsuchiya and Y.Kagawa
Asian Simul.. Conf./5th Int. Conf. on System Simul.   Nov 2002   
Numerical Simulation of Mode Coupling in Piezoelectric Resonators
N.Wakatsuki, T.Tsuchiya, Y.Kagawa and K.Suzuki
Asian Simul.. Conf./5th Int. Conf. on System Simul.   Nov 2002   
Optimum Directivity Synthesis of Ultrasonic Transducers Using Direct Inversion in Combination woth Iterative DFP Method
K. R. Cho, C. D. Kim, T. Tsuchiya and Y. Kagawa
Seoul Int. Simul. Conf. (SeoulSim 2001)   Nov 2001   
Frequency-Temperature Characteristic Analysis of Piezoelectric Resonators using Finite Element Modeling
N. Wakatsuki, T.Tsuchiya, Y. Kagawa and K. Suzuki
Seoul Int. Simul. Conf. (SeoulSim 2001)   Nov 2001   
Finite Element and Boundary Element Modeling of the Acoustic Wave Transmission in Mean Flow Medium
T. Tsuchiya, Y. Kagawa and T. Tsuji
Seoul Int. Simul. Conf. (SeoulSim 2001)   Nov 2001   
TLM Modeling of the Sound Wave Propagation in Moving Medium
Y.Kagawa, Y.Hara, T.Tsuji and T.Tsuchiya
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
Finite Element Simulation of Quartz Crystal Microbalance Sensors
N.Wakatsuki, Y.Kagawa, T.Tsuchiya and M.Haba
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
Transmission Line Matrix Modeling (TLM) of Sound Absorbers
N.Nagahata,Y.Kagawa,N.Wakatsuki and T.Tsuchiya
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
TLM Modeling of SAW Filters and their Time-Domain Response
K-C.Park, T.Tsuchiya and Y.Kagawa
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
FEM Formulation for a 3D Piezoelectric Vibration Under Rotation and its Application
T.Tsuchiya, T.Miyahara, Y.Kagawa and M.Haba
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
Sound Wave Transmission in Moving Medium by Boundary Element Modeling
T.Tsuji, Y.Kagawa, N.Wakatsuki and T.Tsuchiya
JSST Int. Conf. on Modeling, Control and Comp. in Simul.   Oct 2000   
Finite Element Simulation of a Loudspeaker Horn Characteristics -Numerical Solution of Nonlinear Acoustic Waves with the Applications
Y.Kagawa, T.Tsuchiya, M.Doi and T.Tsuji
7th Int. Cong. Sound and Vib.   Oct 2000   
A Single Plate Ultrasonic Gyroscope in Plane Motion
Y.Kagawa, T.Tsuchiya and T.Sakai
Ultrasonics Int. `99   Jun 1999   
Transmission-Line Modelling (TLM) of an Elastic Wave Propagation in Two Dimensions
Y.Kagawa, T.Fujitani and T.Tsuchiya
Forum Acusticum 1999   Jan 1999   
A Tubular Piezoelectric Actuator and Its Characteristic Analysis by Finite-Element Modelling
N.Wakatsuki, T.Tsuchiya, Y.kagawa and K.Hatta
16th Int. Cong. Acoust. (ICA)   Jun 1998   
Finite-Element Simulation of Piezoelectric Transformers
T.Tsuchiya, Y.Kagawa and H.Okamura
16th Int. Cong. Acoust. (ICA)   Jun 1998   
Frequency Characteristic Optimization in Surface Acoustic Wave Filters by DFP Approaches
K-C.Park, Y.Kagawa, T.Tsuchiya and N.Wakatsuki
Int. Sympo. Inv. Problems in Engng. Mech.   Mar 1998   
Simulation of Transient Sounds in a Room Using Transmission-Line Matrix Models
Y.Kagawa, T.Tsuchiya and M.Takeuchi
Inter-Noise 97   Aug 1997   
Design Optimization of Wire Array for Electromagnetic Eave Scattering Using Mathematica
Y.Kagawa, T.Tsuchiya and H.Yamaguchi
‘97 Int. Mathematica Sympo   Jul 1997   
Acoustic Imaging Using Transmission-Line Matrix Model in Time reversal
Y.Kagawa, T.Tsuchiya and K.Fujioka
Int. Conf., Education, Practice and Promotion of Comp. Methods in Engng. Using Small Computers   Aug 1995   
Finite Element Analysis of Electromagnetic Induction Transducers for Acoustic Excitation
T.Tsuchiya, Y.Kagawa and T.Okamuro
3rd World Cong. Comp. Mech.   Aug 1994   
Finite Element Analysis of Piezoelectric Vibrator Gyroscopes
Y.Kagawa, T.Tsuchiya and T.Kawashima
3rd World Cong. Comp. Mech.   Aug 1994   
Finite Element Simulation of High Frequency Ultrasonic Cleaning System
M.Fujioka, E.Ando, T.Tsuchiya and Y.Kagawa
3rd World Cong. Comp. Mech.   Aug 1994   
Directivity Synthesis for Ultrasonic Transducers
T.Tsuchiya, H.Kohno and Y.Kagawa
Inv. Problems in Engng. Mech.   May 1992   
Measurements of Non-Interacting Angle in the Scattering of Sound by Sound for Gases
Y.Watanabe, T.Tsuchiya and Y.Urabe
12th Int. Sympo. Nonlinear Acoust.(ISNA)   Aug 1990   
A Measuring Method of the Non-linearity Parameter B/A of the Medium Regarding the Angle-Dependence of β
T.Tsuchiya, Y.Watanabe and Y.Urabe
2nd Joint Meeting of Acoust. Soc. Am. and Acoust. Soc. Jpn.   Nov 1988   
Theoretical Approach to the Virtual Source Based on the Distribution in Finite-Amplitude Waves
Y.Watanabe, T.Tsuchiya and Y.Urabe
2nd Joint Meeting of Acoust. Soc. Am. and Acoust. Soc. Jpn.   Nov 1988   

Research Grants & Projects

 
音空問レンダリングによる防災行政無線の音声明瞭度予測・提示システムの開発
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 2014 - 2016    Investigator(s): Takao Tsuchiya
高精細音空間コンテンツのための主観的最適化音空間ディスプレイの研究開発
総務省 東北総合通信局: 戦略的情報通信研究開発推進事業(SCOPE)
Project Year: 2013 - 2015    Investigator(s): Yukio Iwaya
シリコンコンサートホールのための音響レンダリング手法の高精度・高速化
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 2010 - 2012    Investigator(s): Takao Tsuchiya
革新的な三次元映像技術による超臨場感コミュニケーション技術の研究開発
NICT: 委託研究
Project Year: 2009 - 2012    Investigator(s): Takao Tsuchiya
FPGAによるシリコンコンサートホール実現の検討
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 2007 - 2008    Investigator(s): Takao Tsuchiya
離散ホイヘンスモデルによる音場の実時間数値解析システムの開発
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 2004 - 2005    Investigator(s): Takao Tsuchiya
Sound Field Rendering by CE-FDTD Method
Project Year: 2004   
A high-accuracy numerical simulation of sound field using CIP method
Project Year: 2006   
A high performance numerical simulation of acoustic field using GPU
Project Year: 2007   
Development of Silicon Concert Hall by FPGA
0023 (Japanese Only)
Project Year: 2009 - 2013
圧電フィードバック系を含むマクロ/マイクロシステムの振動制御
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 2001 - 2002    Investigator(s): Takao Tsuchiya
TLM逆伝搬アルゴリズムによる音源探査システムの開発
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 1999 - 2000    Investigator(s): Takao Tsuchiya
TLM逆伝搬アルゴリズムによる超音波CTの開発
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 1997 - 1998    Investigator(s): Takao Tsuchiya
強力電磁誘導トランスジューサによって形成される非線形集束音場の時間応答解析 と実験
JST: 科学研究費補助金 若手研究(A)
Project Year: 1996 - 1996    Investigator(s): Takao Tsuchiya
数値ファントムを用いた集束衝撃波胆石破砕のための数値シミュレータの開発
JST: 科学研究費補助金 基盤研究(C)(一般)
Project Year: 1995 - 1996    Investigator(s): Takao Tsuchiya
超音波圧電トランスデューサによって形成される過渡音場の解析
JST: 科学研究費補助金 若手研究(A)
Project Year: 1992 - 1992    Investigator(s): Takao Tsuchiya