SHIMIZU, Yasushi Acoustical Design & Research Consultant
E-mail: shimizu@shimiy.com
shimizu.yasushi@gmail.com
Site: https://sites.google.com/a/shimiy.com/acoustics/
Research
Interests
Psychological acoustics
Active sound field control and
sound field synthesis
Signal processing of room
acoustics
Architectural acoustics
measurement
Acoustical consultation of
performing space
Education
Graduate
school
Tokyo Institute of Technology,
M.S., Civil Engineering, March
1977
Under
graduate school
Tokyo Institute of Technology,
B.S., Architecture, March, 1975
Academic
Appointments
Architectural Institue of Japan, Chair of Speech Privacy Committee for AIJES
Member of two committees
Visiting Professor, Department of Built
Environment, Tokyo Institute of Technology, Tokyo 2008 - 2016
Senior
Research Associate Professor, Architectural Acoustics Program, Rensselaer
Polytechnic Institute, USA, 2000-2003
Yamaha
Seminar on “Architectural Acoustics” (Japan), 1992-1997
NHK
Seminar on “Sound” (Japan), 1991
Niigata
Performing Arts Center Workshop on “Sound” (Japan), 1995
Professional
Experience
Group Leader,
Department
of Research and Development, Yamaha Corporation of Japan, 2003-2010
MASS
Project, Collaboration of Yamaha/CCRMA,
Stanford University, 2006
Senior
Research scientist, Sound Field Control Group
Acoustics Research
Laboratories, YAMAHA Corporation of Japan, 1990-2000
Research
Scientist,
Architectural Acoustics
Laboratory, YAMAHA Corporation of Japan, 1977-1990
Member
of Architecture design competition committee, Fukuroi Performing Arts Center,
Japan 1997
Licensed Architect (Japan)
Research field
For many years he
has been actively interested in studying the psychological acoustics and sound
field control technology as well as acoustical consultation of performing arts
center.
His major research field has been sound field
control technology with both and either of physical acoustic and
electro-acoustic technique. He has conducted the research of subjective
evaluation of concert hall acoustics, variable acoustic control technology with
physical means, reverberation enhancement with electro-acoustic technology and
sound field auralization of concert hall acoustics. From these researches he developed
the Assisted Acoustics System (AAS) for the reverberation enhancement, Image
Wall Sound (IWS) System for amphitheater acoustics and Sound Field Synthesizer
(SFS) for virtual reality. Besides he
conducted the research of 1/10 acoustic scale model and sound field creation
with computer simulation for acoustic consultation. During 1987 and 1989 he
took charge of the research on the high-fidelity sound field reproduction
system for TV with NHK science & technical research laboratories, Tokyo.
During 1995 and 2000 he had leaded the cooperative research on active sound
field control with Kohgakuin University, Tokyo. He had taken charge of the acoustic
consultation of the distinguished performing arts center in Japan, Taiwan and
Singapore with the state of the arts technology and latest research results.
His recent interest is
focusing the research on the acoustic control technology incorporating physical
acoustics, electro-acoustics and information technology. The results will be
applied to acoustic environment control of classroom and virtual sound filed
creation of distance education, etc.
Representative Projects
(Acoustical Consultation)
Civic Hall in Shonandai Culture Center,
Japan, 1991
Fukuoka Symphony Hall, Japan, 1995
Niigata City Performing Arts Center, Japan
Osaka Dome, Japan, 1997
Tokyo International Forum, Japan -- ICA,
1998/06
Hakata-za – Kabuki Theater, Japan, 1999
Singapore Indoor Stadium, Singapore, 1994
Taiwan City Library Hall, Taiwan, 1995
Memberships
in Professional Societies
Acoustical
Society of Japan
Architectural
Institute of Japan
Acoustical
Society of America
Audio Engineering Society of
America
Major
Paper’s Presented
1.
Active sound Field Control
(JP) Improvement of low frequency
characteristics in recording studio
Preprint of the conference
of Acoustical Society of Japan, 1980/10
(JP) Subjective impression due to the
incident angle of the single echo -
Coloration and Image shift -
Architectural Acoustics Committee of
Acoustical Society of Japan, 1983/05
(JP) Acoustics of Houza-seki in Rissyo
Kousei-kai - Sound Field Control by
electro-acoustic means -
Architectural Acoustics
Committee of Acoustical Society of Japan,
AA85-33, 1985/10
(JP) Assisted Acoustics, Journal of
Japan Audio Society, 19, 1987/05
(JP) Consideration of Assisted Acoustics - Reverberation Control - part 1
Preprint of the conference
of Acoustical Society of Japan, 1987/10
(JP) Consideration of Assisted Acoustics - Application for large spaces - part2
Preprint of the conference
of Acoustical Society of Japan, 1987/10
(JP) Consideration of Assisted Acoustics - Relationship with Room Acoustics - part3
Preprint of the conference
of Acoustical Society of Japan, 1988/03
(JP) Enhancement of "Reverberation"
by electro-acoustic means
Electro-acoustic Committee,
1987/11
(JP) Active Sound Field Control for large
space - AFC for Tokyo Gymnasium -
Preprint of the conference
of Acoustical Society of Japan, 1991/03
(JP) Consideration of the stability
evaluation for the Assisted Acoustics System
Preprint of the conference
of Acoustical Society of Japan, 1993/03
(JP) A consideration on time-variant method
for expanding the controllability
of the Assistance of Sound
Field with electro-acoustic means
- On the stability control with time-variant
FIR filter and spatial averaging method -
Preprint of the conference of Acoustical Society of Japan, 1996/09
(JP) Assistance of Sound field for the large
space
Architectural Acoustics
Committee of Acoustical Society of Japan, 1997/3
(JP) Improvement of Room Acoustics by electro-acoustic means
- Application for Multi-purpose Hall
- Acoustic Technology, no.108,1999/12
(Eng.)
Active Field Control in Auditoria
F.kawakami, Y.Shimizu, Applied Acoustics 31,47-75,'90
2.
Sound Field Simulation
(JP) Subjective impression due to the
incident angle of the single echo - Spatially Averaged Trangent
Frequency Response Measurement -Preprint
of the conference of Acoustical Society of Japan, 1983/10
(JP) Consideration of simulating the sound
field - Sound Field Synthesizer - part 1
Architectural Acoustics
Committee of Acoustical Society of Japan, 1986/4
(JP) Consideration of simulating the sound
field - Reproduction of the
"Spatial Impression" - part2
Preprint of the conference of
Acoustical Society of Japan, 1986/04
(JP) Consideration of simulating the sound
field - Reproduction of incident angle
in the sound reflection
Preprint
of the conference of Acoustical Society of Japan, 1988/10
(JP) Evaluation of the Recording &
Reproduction System for the Reproduction of the Sound Field
Preprint of the conference
of Acoustical Society of Japan, 1989/03
(JP) Fundamental Study of Multi-Channel Room
Simulator for the Hi-fidelity Sound Field Reproduction
Research Report of the
Broadcasting Foundation, no.11,1989
(Eng.) New Digital Reverberation System with
excellent control capability of early reflection
K.Niimi, Y.Shimizu, preprint of AES, 1985
3. International Conference
1998
1. Y. Shimizu, S. Yamashita, F. Kawakami, et.al., Active Field Control for Tokyo International Forum facilities by Electro-acoustics Means,
16th International Congress on Acoustics, 1998, pp.2115-2116
2001
2. Y. Shimizu, Consideration of the propagation loss of the direct sound with change in seat conditions,
141st Meeting, Acoustical society of America, J. Acoust. Soc. Am., Vol. 109, No.5, Pt.2, May 2001, p.2284
3. Y. Shimizu, A consideration on physical tuning for acoustical coloration in recording studio,
141st Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol. 109, No.5, Pt.2, May, 2001, p.2264
2002
4. Y. Shimizu, Investigation of Reverberation synthesized by electro-acoustic enhancement systems, from a subjective and physical standpoint,
143rd Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol.111, no.5, Pt.2, May, 2002, p.2441
5. Y. Shimizu, A. Stephaniw, D. Lodico, R. Torres, The influence of spatialized background noise on ease of hearing in rooms,
144th Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol. 112, No.4, Pt2,, November 2002 p.2200
2003
6. Y. Shimizu, A consideration on physical tuning for acoustical coloration in recording studio,
145th Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol.113, No.4, Pt.2, April, 2003, p.2273
7. Y. Shimizu, Variable acoustics in small rooms for music,
146th Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol.114, No.4, Pt.2, October, 2003, p.2315
2004
8. A. Ito, Y. Shimizu, Active Control for Piano Room,
147th Meeting, Acoustical Society of America, J. Acoust. Soc. Am. Vol. 115, No.5, Pt.2, May 2004, p.2514
2008
9. Y. Shimizu, M. Fujiwara, A. Ito, Case study of assessing audibility by “Perspicuity” for sounds added to Factory Noise, using different types of speaker in directional performance,
Acoustics’08 Paris, J. Acoust. Soc. Am. Vol. 123, No.5 Pt2, May 2008 p.2981
10. Y. Shimizu, M. Hata, A. Ito, M. Hatanaka, Dynamic sound image creation by uni-directional sound beam reproduction toward an interior surface with a DSP controlled line array speaker for surround sound composition, Acoustics’08 Paris, J. Acoust. Soc. Am. Vol. 123, No.5 Pt2, May 2008 p.2980
11. Y. Shimizu, H. Furuya, Three dimensional representation method for a public indoor sound scape with multiple sound sources, Acoustics 2012, Hong Kong, 2012, 05
12. Y. Shimizu, Y. Honji, F. Kawakami, Acoustical design of the Concert Hall in Niigata Performing Arts Center - New acoustical design criteria for Surround Concert Hall -, International Symposium on Room acoustics, 2004
13. Y. Shimizu, M. Fujiwara, Speech Privacy in Japan, Relevant Feeling Evaluation and enhancement, Internoise 2009, 08, pp14. Y. Shimizu, R. Okuma, Influence of Auditory Sound Width on Speech Intelligibility in a Public Space, Internoise 2009, 08
Honors
and Awards
Technical
Award from Acoustical Society of Japan
for the acoustical consultation of
Tokyo International Forum,1998
Jury
of Architecture Design Competition, Fukuroi Performing Arts Center, Japan 1997
External
Research Funding
Bass
Foundation Research Gift, 1999-2002
NYSTAR
EQS Center, Grant for Facilities and Equipment, awarded 2001.
National
Endowment for the Arts, Preservation and Heritage Grant, pending.
Graduate
and Ph.D students Advisor
Ph. D
students: (Rensselaer Polytechnic Institute)
One Student
Ph.D students: (Tokyo Institute of
Technology)
Two Students
Graduate
students: (Rensselaer Polytechnic Institute)
Four Students
Graduate
Students: (Tokyo Institute of Technology)
Six students