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Updated: Feb 9, 2026
09:33
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
6.7K
Shaping reverberating sound fields with an actively tunable metasurface.
Guancong Ma1,2,3, Xiying Fan2, Ping Sheng1,2
1Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; phgcma@hkbu.edu.hk sheng@ust.hk mathias.fink@espci.fr.
Summary
Researchers developed a novel acoustic metasurface to control sound fields in reverberating environments. This technology enables precise manipulation of sound, creating quiet zones and hotspots for enhanced acoustics.
Area of Science:
- Acoustics
- Materials Science
- Wave Physics
Background:
- Reverberating environments, like concert halls, present complex acoustic challenges.
- Controlling sound fields in such spaces has been difficult due to their complexity.
Purpose of the Study:
- To demonstrate versatile control of reverberating sound fields.
- To introduce a method for actively manipulating sound in complex acoustic spaces.
Main Methods:
- Combining acoustic metasurface technology with adaptive wavefield shaping.
- Designing and realizing a binary phase-modulating spatial sound modulator.
- Utilizing an actively reconfigurable acoustic metasurface.
Main Results:
- Demonstrated versatile control over reverberating sound fields.
- Successfully created localized quiet zones within the environment.
- Successfully created acoustic hotspots (regions of amplified sound).
Conclusions:
- The developed acoustic metasurface offers effective control of sound in reverberating environments.
- This technology has potential applications in architectural acoustics and sound system design.
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