Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Sound Waves: Interference00:53

Sound Waves: Interference

5.3K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
5.3K
Sound Waves01:01

Sound Waves

13.9K
Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
13.9K
The Seven Crystal Systems: Overview01:24

The Seven Crystal Systems: Overview

245
Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific...
245
Sound as Pressure Waves01:17

Sound as Pressure Waves

4.9K
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
4.9K
Sound Waves: Resonance01:14

Sound Waves: Resonance

3.8K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
3.8K
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.7K
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:
1.7K

You might also read

Related Articles

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

Sort by
Same author

Enhanced Numerical Equivalent Acoustic Material (eNEAM): Analytical and Numerical Framework for Porous Media with Thermo-Viscous Effects for Time Domain Simulations.

Materials (Basel, Switzerland)·2025
Same author

First Search for Axion Dark Matter with a MADMAX Prototype.

Physical review letters·2025
Same author

First Search for Dark Photon Dark Matter with a madmax Prototype.

Physical review letters·2025
Same author

Natural sonic crystal absorber constituted of seagrass (Posidonia Oceanica) fibrous spheres.

Scientific reports·2021
Same author

Laparoscopic cytoreductive surgery and HIPEC is effective regarding peritoneum tissue paclitaxel distribution.

Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico·2019
Same author

Nonlinear dispersive waves in repulsive lattices.

Physical review. E·2018

Related Experiment Video

Updated: Apr 17, 2026

Enhancement Method of Surface Acoustic Wave-Atomizer Efficiency for Olfactory Display
08:06

Enhancement Method of Surface Acoustic Wave-Atomizer Efficiency for Olfactory Display

Published on: November 14, 2018

8.5K

Sound diffusers based on sonic crystals.

J Redondo1, R Picó1, V J Sánchez-Morcillo1

  • 1Instituto de Investigación para la Gestión Integrada de zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730, Grao de Gandia, València, Spain.

The Journal of the Acoustical Society of America
|February 12, 2015
PubMed
Summary

This study introduces a novel sound diffuser utilizing sonic crystals. The biperiodic structure achieves significant low-frequency diffusivity and enhances time spreading compared to conventional diffusers.

More Related Videos

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test
08:16

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

12.1K
Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
14:22

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

15.7K

Related Experiment Videos

Last Updated: Apr 17, 2026

Enhancement Method of Surface Acoustic Wave-Atomizer Efficiency for Olfactory Display
08:06

Enhancement Method of Surface Acoustic Wave-Atomizer Efficiency for Olfactory Display

Published on: November 14, 2018

8.5K
Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test
08:16

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

12.1K
Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
14:22

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

15.7K

Area of Science:

  • Acoustics
  • Materials Science
  • Wave Phenomena

Background:

  • Sonic crystals are periodic structures designed to manipulate sound waves.
  • Conventional diffusers often struggle with low-frequency sound diffusion.
  • Biperiodic structures offer potential for advanced acoustic control.

Purpose of the Study:

  • To propose and analyze a novel sound diffuser based on sonic crystals.
  • To investigate the low-frequency performance of a biperiodic sonic crystal diffuser.
  • To compare the time-spreading capabilities of this new diffuser with existing technologies.

Main Methods:

  • Design of a biperiodic structure using two arrays of sonic crystals with differing periodicities.
  • Analysis in the homogenization limit to interpret low-frequency behavior.
  • Characterization of diffusivity and time-spreading properties.

Main Results:

  • The proposed biperiodic sonic crystal diffuser achieves large diffusivity at low frequencies.
  • Performance is optimized when the scale of diffuser blocks significantly exceeds crystal periodicity.
  • The diffuser demonstrates enhanced time spreading compared to conventional designs.

Conclusions:

  • Sonic crystal based diffusers represent a promising advancement in acoustic diffusion.
  • The biperiodic design offers superior low-frequency performance and time-spreading.
  • This technology has potential applications in architectural acoustics and sound engineering.