Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Primary Inverted Papilloma of the Middle Ear.

Ear, nose, & throat journal·2021

See all related articles

Search research articles

Related Experiment Video

Updated: Nov 6, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

2D Dynamic Directional Amplification (DDA) in Phononic Metamaterials.

Moris Kalderon¹, Andreas Paradeisiotis¹, Ioannis Antoniadis¹

¹Dynamics & Structures Laboratory, Section of Mechanical Design & Control Systems Section, School of Mechanical Engineering, National Technical University of Athens, 15780 Athens, Greece.

Materials (Basel, Switzerland)

|May 5, 2021

Summary

A novel dynamic directional amplification (DDA) mechanism enhances phononic lattices without adding mass. This innovation creates wider low-frequency bandgaps for improved vibration and sound isolation in metamaterials.

Keywords:

damping dynamic directional amplifier metamaterials phononic

More Related Videos

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

Related Experiment Videos

Last Updated: Nov 6, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

Area of Science:

Acoustics and Materials Science
Metamaterials and Phononic Structures
Vibration and Wave Propagation Control

Background:

Phononic structures utilize Bragg scattering and local resonance for wave propagation control.
Existing methods face limitations in achieving wide low-frequency bandgaps.
Practical challenges include heavy oscillating masses and increased damping requirements.

Purpose of the Study:

To propose a novel dynamic directional amplification (DDA) mechanism for phononic lattices.
To enhance low-frequency bandgap performance without increasing structural mass or damping.
To investigate the effectiveness of DDA in improving inertia and damping characteristics.

Main Methods:

The DDA mechanism is integrated into a two-dimensional (2D) phononic lattice.
Kinematic constraints are imposed on the structure's degrees of freedom (DoF).
Bloch's theory is employed for analyzing the 2D lattice and deriving dispersion relations.

Main Results:

The DDA mechanism achieves improved inertia and damping in a specific direction.
Numerical results demonstrate significantly broader bandgaps compared to conventional structures.
An increased damping ratio is observed, enhancing vibration isolation capabilities.

Conclusions:

The proposed DDA mechanism offers a mass- and damping-efficient approach to phononic lattice design.
This method overcomes limitations of traditional Bragg and local resonance mechanisms.
Potential applications include advanced mechanical filters, vibration isolators, and acoustic waveguides.