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Acoustic Engineering Lab
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This acoustic engineering lab solves the mechanisms of sound and vibration through computation and controls them.
AboutAbout the lab
Analyzing and controlling sound and vibration
Professor Toshiya Samejima specializes in acoustic engineering, conducting research on analyzing sound and vibration systems through theory and numerical computation, as well as research on controlling them.
The subjects include musical instruments, stage equipment, electroacoustic transducers such as loudspeakers and headphones, ocean acoustic waves and seismic waves, and the vibration and radiated sound of railway rails.
In its control research, the lab applies the ideas of passive and active control to musical instruments and electroacoustic transducers.
The lab also conducts research on physical-model sound sources for electronic musical instruments.
Key terms
- Coupled analysis
- Analysis that computes things that influence each other, such as a sound field and the vibration of an object, together
- Physical-model sound source
- A sound source for electronic musical instruments that expresses an instrument's vibration and sound-producing mechanism with physical equations and generates sound by computation
- Active control
- Control that actively changes the state of sound or vibration by applying external force or signals
ResearchResearch themes
Centered on acoustic engineering, the lab studies theoretical and numerical analysis of acoustic and vibration systems, and their passive and active control. The subjects include musical instruments, stage equipment, electroacoustic transducers, ocean acoustic waves, and railway rails, and the lab also pursues research that incorporates control theory.
*Illustrative imageTheoretical and numerical analysis of sound and vibration
The lab works on coupled analysis of vibration fields, sound fields, and fluid-acoustic fields in musical instruments and stage equipment, and on improving the fidelity of physical-model sound sources for electronic musical instruments. It also handles the analysis of loudspeakers and headphones, propagation analysis of ocean acoustic waves and seismic waves, and analysis of the vibration and radiated sound of railway rails.
Research on controlling sound and vibration
As passive and active control of musical instruments, stage equipment, and electroacoustic transducers, the lab deals with topics such as active control of acoustic-electric guitars and removal of nonlinear distortion in loudspeakers. It also works on introducing control theory into acoustic metamaterials, sound field reproduction, and noise and vibration control systems, and on developing actively controlled sound-absorbing and sound-insulating materials.
MembersFaculty
- ProfessorToshiya Samejima
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Violins, Museum of Making Music” doryfour / CC BY-SA 2.0 (cropped)
- Theoretical and numerical analysis of sound and vibration: “Quadratic Chladni plate” High Contrast / CC BY 3.0 de (cropped)
- Related lab (Acoustic Engineering Lab (Toshiya Samejima)): “Drum for cultural dance” Elizfred / CC BY-SA 4.0 (cropped)
- Related lab (Psychoacoustics Lab (Masayuki Takada)): “Leslie S3L Train horn” 作者不詳 / Public domain (cropped)
- Related lab (Psychoacoustics Lab (Masayuki Takada)): “French horn front” BenP / CC BY 2.5 (cropped)
- Related lab (Architectural Acoustics Lab): “FDA Bldg 62 - Anechoic Chamber ( )” The U.S. Food and Drug Administration / Public domain (cropped)
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