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

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

733
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
733
Series Impedances: Three-Phase Line01:27

Series Impedances: Three-Phase Line

471
Calculating series impedances for a three-phase overhead line involves evaluating resistances and inductive reactances in a network with three-phase and multiple neutral conductors grounded at regular intervals.
Using Kirchhoff's laws, an integro-differential equation for the network is derived. This equation accounts for unbalanced phase currents, which may induce return currents through neutral wires and the earth, seeking the least impedance path. Earth return conductors can replace the...
471
Shunt Admittances01:26

Shunt Admittances

529
Shunt admittances play a crucial role in the analysis of transmission lines, particularly for three-phase systems with neutral conductors. When a uniformly charged conductor is positioned above the Earth, it induces an equal but opposite charge on its surface. This interaction creates electric field lines between the conductor and the Earth.
To model this effect, the method of images is employed. This method involves replacing the Earth with an image conductor that mirrors the original...
529
Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

3.2K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
3.2K
Impedances and Admittance01:23

Impedances and Admittance

2.0K
In the realm of AC circuits, passive circuit elements like resistors, inductors, and capacitors take on a different character when characterized by phasor voltage and current. Their behavior is expressed through impedance, a vital concept in AC circuit analysis.
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
2.0K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

2.0K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
2.0K

You might also read

Related Articles

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

Sort by
Same author

Reverberation-chamber measurement of angle-dependent surface impedancea).

The Journal of the Acoustical Society of America·2026
Same author

Differentiable physics for sound field reconstruction.

The Journal of the Acoustical Society of America·2025
Same author

Three-dimensional directivity measurement of acoustic diffusers using regularized holography and sound field separationa).

The Journal of the Acoustical Society of America·2025
Same author

Morphogenesis of sound creates acoustic rainbows.

Science advances·2025
Same author

Reconstruction of reverberant sound fields over large spatial domains.

The Journal of the Acoustical Society of America·2025
Same author

BERT-based natural language processing analysis of French CT reports: Application to the measurement of the positivity rate for pulmonary embolism.

Research in diagnostic and interventional imaging·2024
Same journal

High-resolution depth estimation for multiple wideband sources in deep sea via sparse Bayesian learninga).

The Journal of the Acoustical Society of America·2026
Same journal

Depression markers in speech: An approach based on tract variables dynamics.

The Journal of the Acoustical Society of America·2026
Same journal

The oyster toadfish (Opsanus tau) alters active and diurnal calling amid vessel noise in New York City.

The Journal of the Acoustical Society of America·2026
Same journal

Experimental noise characterisation of phase-locked tandem-rotor in edgewise flight.

The Journal of the Acoustical Society of America·2026
Same journal

The tune-text-temporal synergy: Prosodic effects of final segmental weakening in Neapolitan.

The Journal of the Acoustical Society of America·2026
Same journal

Monitoring vessel movement above critical offshore infrastructure using distributed acoustic sensing.

The Journal of the Acoustical Society of America·2026
See all related articles

Related Experiment Video

Updated: Feb 28, 2026

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

5.4K

Estimation of surface impedance at oblique incidence based on sparse array processing.

Antoine Richard1, Efren Fernandez-Grande1, Jonas Brunskog1

  • 1Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark (DTU), Building 352, Ørsteds Plads, DK-2800 Kongens Lyngby, Denmark.

The Journal of the Acoustical Society of America
|June 17, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method using spherical microphone arrays to accurately estimate the surface impedance of absorptive panels. The technique enhances sound field reconstruction, improving acoustic material characterization.

More Related Videos

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

8.2K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.8K

Related Experiment Videos

Last Updated: Feb 28, 2026

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

5.4K
Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

8.2K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.8K

Area of Science:

  • Acoustics
  • Materials Science
  • Signal Processing

Background:

  • Accurate estimation of surface impedance is crucial for designing sound-absorbing materials and structures.
  • Traditional methods often face limitations in complex sound fields or require specialized setups.
  • Free-field measurements with microphone arrays offer a promising avenue for non-invasive material characterization.

Purpose of the Study:

  • To propose and validate a new method for estimating the surface impedance of large absorptive panels.
  • To leverage spherical microphone array measurements and advanced signal processing for enhanced accuracy.
  • To assess the performance of the method across various incidence angles and frequencies.

Main Methods:

  • Utilizing an equivalent source method with spherical microphone array measurements to reconstruct surface pressure and particle velocity.
  • Applying compressive sensing techniques to exploit the spatially sparse nature of the sound field (incident and reflected waves).
  • Conducting free-field measurements to capture the sound interaction with the absorptive panel.

Main Results:

  • The proposed method accurately reconstructs surface impedance for angles of incidence from 0° to 60°.
  • Effective frequency range for accurate estimation is approximately 200 Hz to 4000 Hz.
  • The study identified and discussed experimental challenges, including sample finiteness and background noise estimation.

Conclusions:

  • The developed method provides a reliable approach for determining the surface impedance of absorptive panels.
  • Spherical microphone arrays combined with compressive sensing offer significant advantages in acoustic material characterization.
  • Further research can address the identified experimental challenges for broader applicability.