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Near-perfect sound absorption using hybrid resonance between subwavelength Helmholtz resonators with non-uniformly partitioned cavities

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Acoustic properties of micro-perforated panel absorber having arbitrary cross-sectional perforations - ScienceDirect

Additively Manufactured Sound-Absorbing Porous Structures for Airfoil Trailing-Edge Noise Control, Journal of Aerospace Engineering

Noppadon KERDDONFAG National Metal and Materials Technology

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hi-tech engineering in micro material treatement and perforation, IPM International Perforation Management

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Wannee CHINSIRIKUL, Executive Director

The hydraulic mean diameter