projects

Research projects by Woongji Kim covering parametric array loudspeakers, acoustic transducers, acoustic metamaterials, field characterization, and experimental instrumentation.

skills

research workflow and technology stack

Systematic research methodology integrating COMSOL multiphysics simulation, MATLAB-based modeling, and scalable data infrastructure for acoustic transducer development.

research
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parametric array loudspeakers

Research on parametric array loudspeaker transducers — highly directional sound sources utilizing nonlinear acoustics, stepped plates, and dual-domain metamaterials.
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spurious sound filter

Design of a spurious sound filter using a half-wavelength resonator analogy for accurate parametric array loudspeaker measurements.

experiment
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acoustical field characterization

Fully automated acoustical field characterization system for measuring directivity and sound pressure levels in a semi-anechoic chamber.
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mechanical vibration characterization

Mechanical vibration characterization of radiating plates using laser Doppler vibrometry (LDV) for transducer validation.
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material property evaluation

Dynamic material property evaluation of piezoelectric materials using the impulse excitation technique complying with the ASTM E1876 standard.
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hardware design, assembly, and instrumentation

Custom hardware design, assembly, and instrumentation for acoustic experiments, including impedance tube construction and measurement setups.

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