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Acoustic Engineering Lab (Toshiya Samejima)
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A lab of acoustic engineering that analyzes and controls sound and vibration, from musical instruments to loudspeakers.
AboutAbout the lab
Handling sound and vibration through computation and control
The Acoustic Engineering Lab analyzes and controls acoustic and vibration systems through theory and numerical computation.
Targeting musical instruments, stage equipment, loudspeakers, and headphones, the lab works on coupled analysis, which links vibration and sound fields in a single calculation.
It also researches making physical-model sound sources for electronic musical instruments more faithful and accurate, as well as passive and active control.
Prof. Samejima belongs to the Acoustic Design Division of the Faculty of Design.
Key terms
- Coupled analysis
- A method of using computation to study, all together, multiple phenomena that influence each other, such as sound and vibration
- Physical-model sound source
- A sound source that represents how a musical instrument works with physical equations and generates sound by computation
- Active control
- Control that applies external actions according to the state of sound or vibration to bring it closer to a desired state
ResearchResearch themes
The lab studies theoretical and numerical analysis of acoustic and vibration systems, along with passive and active control. Its subjects include musical instruments, stage equipment, electroacoustic transducers, sound propagation in the ocean, and railway rails.
*Illustrative imageTheoretical and numerical analysis of sound and vibration systems
The lab analyzes the vibration fields, sound fields, and fluid-acoustic fields of musical instruments and stage equipment in a coupled manner. Its subjects also include physical-model sound sources for electronic musical instruments, analysis of loudspeakers and headphones, sound propagation in the ocean, and sound radiated from railway rails.
*Illustrative imageControl of sound and vibration systems
The lab works on passive and active control of musical instruments, stage equipment, and electroacoustic transducers. Its subjects also include vibration control of headphones, removal of nonlinear distortion in loudspeakers, and the introduction of control theory into acoustic metamaterials.
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: “Drum for cultural dance” Elizfred / CC BY-SA 4.0 (cropped)
- Theoretical and numerical analysis of sound and vibration systems: “Old Vintage Electric Guitar ( )” Dejan Krsmanovic / CC BY 2.0 (cropped)
- Control of sound and vibration systems: “Voice coil (Schwingspule) of a Visaton W 100 S loudspeaker (12 cm diameter) for bass and midrange” Corvintaurus / CC BY-SA 3.0 (cropped)
- Related lab (Acoustic Engineering Lab): “Violins, Museum of Making Music” doryfour / CC BY-SA 2.0 (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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