092-553-4551

092-553-4551

Study on the organ pipes and their application to underwater sound sources

Musical Instrument Acoustics

Research: (1) Physical acoustics of musical instruments (sounding mechanisms, interrelation between
instrument's structure and material and the resulting tone, interface between the player
and the instrument, etc.)
(2) Design research by extending the concept of musical instruments (acoustical research of
Gaudi's Sagrada Familia Cathedral)

Education: lecture on acoustics of musical instruments (3rd grade), seminar and foreign literature (3rd grade), and acoustical design of musical instruments (graduate school)

Social activity: Regional consociation R&D project "Development of new environmental material with
high rigidity and high damping characteristic" (2003 and 2004 FY)

Research Interests

• Acoustical study on woods for musical instruments
  keyword : string instruments, percussion instruments, woods, vibration parameter, transmission parameter, timbre, Stradivarius
  2006.10～2011.03.
• Acoustical study on the "sawari" (softly touching) mechanism in the Satsuma biwa and other similar plucked string instruments
  keyword : "sawari", biwa, shamisen, sitar, emphasis of higher harmonics, numerical simulations
  2006.04～2013.03.
• Acoustics of the organ pipes
  keyword : sound production mechanism, vortex-sound theory, air jet, mode locking、PIV
  1998.04～2012.03.
• Acoustical study on the Sagrada Familia Church
  keyword : belfry, bells, nave, louvered windows, silencing mechanism, sound diffusion mechanism
  2003.04～2014.03.
• Acoustical study of the bowed string instruments such as the violin
  keyword : string, bow, rosin, torsional vibration, wolf note, Helmholtz wave
  2003.04～2013.03.
• Acoustical study of the Japanese shakuhachi
  keyword : intonation anomaly, cutoff frequency, open hole lattice, input admittance, shousouin shakuhachi
  2008.04～2014.03.

Current and Past Project

• International Joint Research on the Acoustics of the Sagrada Familia Church
• Joint research on Gaudi's bells in the Sagrada Familia Church
• The aim of this research project is the development of the environment-oriented and
  low-cost material on the basis of high-stiffness and high-damping characteristics of the ceramics. Optimum design and evaluation is carried out concerning the substitutes of hard woods used as woodwind wall material and the application to
  building material and machine components. The duty of Kyushu University is to
  acoustical evaluation of musical instruments made of ceramics.
• The R&D carried out in 2003 and 2004 fiscal years is continued and complemented. The duty of Kyushu University is the acoustical evaluation of musical instruments made of ceramics.

Academic Activities

Educational Activities Other Educational Activities

• 2012.03,A master-course graduate student (Mr. Takayasu Ebihara) received the best student prize from the Communication Design Science Course, the Graduate School of Design..
• 2012.03,A graduate student (Miss Kazue Kajiwara) received the best student prize from the Department of Acoustic Design, the Faculty of
  Design. .
• 2006.12,The Department of Civil and Environmental Engineering, Chalmers University of Technology, Sweden nominated me as the opponent in the public defense. The candidate of doctoral dissertation was Mr. Matthias Scholz, and his thesis title was "Sound generation in metal organ pipes". The public defense was opened at 10 AM, 19 December 2006 and closed at 12:40 PM. Continuously, the grades committee was held and the decision of "Pass" was made after some discussion. The notice of "Pass" was immediately given to the candidate by the committee chairman, and a celebration party was held..

Professional and Outreach Activities