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

Overview Of Cell Separation And Isolation

Overview Of Cell Separation And Isolation

Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.

Size-Exclusion Chromatography

Size-Exclusion Chromatography

In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...

Capillary Electrophoresis: Applications

Capillary Electrophoresis: Applications

Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...

Atomic Emission Spectroscopy: Lab

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

Mass Spectrometry: Complex Analysis

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...

You might also read

Related Articles

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

Sort by

Same author

Leaky adaptive filtering approaches for music-driven sound zone generation.

The Journal of the Acoustical Society of America·2026

Same author

Analytical model for the wave propagation velocity in a fluid-coupled membrane (L).

The Journal of the Acoustical Society of America·2026

Same author

Measuring the radiation of sound sources with the radiation mode method: Towards realistic problems.

The Journal of the Acoustical Society of America·2024

Same author

Online adaptive identification of multichannel systems for audio applications.

The Journal of the Acoustical Society of America·2024

Same author

[Environmental sound management].

La Revue du praticien·2023

Same author

Comparison of three full-field optical measurement techniques applied to vibration analysis.

Scientific reports·2023

Search research articles

Related Experiment Video

Updated: May 9, 2026

Spatial Separation of Molecular Conformers and Clusters

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Evaluation of a separation method for source identification in small spaces.

Yacine Braikia¹, Manuel Melon, Christophe Langrenne

¹Conservatoire National des Arts et Métiers, LMSSC, 292 rue Saint Martin, F-75141 Paris Cedex 3, France.

The Journal of the Acoustical Society of America

|July 19, 2013

Summary

This summary is machine-generated.

This study validates a field separation method for pinpointing sound sources in non-ideal acoustic spaces. The technique effectively isolates direct sound fields from wall reflections, improving acoustic source identification.

More Related Videos

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

3D Depth Profile Reconstruction of Segregated Impurities Using Secondary Ion Mass Spectrometry

Published on: April 29, 2020

Related Experiment Videos

Last Updated: May 9, 2026

Spatial Separation of Molecular Conformers and Clusters

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

3D Depth Profile Reconstruction of Segregated Impurities Using Secondary Ion Mass Spectrometry

Published on: April 29, 2020

Area of Science:

Acoustics
Signal Processing
Vibration Analysis

Background:

Measurements in non-anechoic spaces are contaminated by direct sound fields and wall reflections.
Accurate sound source identification requires isolating the direct field from reflected contributions.
Existing methods struggle with complex acoustic environments like vehicle interiors.

Purpose of the Study:

To evaluate the efficiency of a field separation method for sound source identification in small, non-anechoic spaces.
To compare different implementations of the field separation technique based on probe type.
To analyze the impact of wall reflection coefficients on method performance.

Main Methods:

Acoustic data (pressure/velocity) measured on a hemispheric array.
Spherical harmonic expansions used to separate outgoing and incoming wave contributions.
Numerical comparison of different probe types and analysis of wall reflection coefficients.
Experimental validation in a car trunk mock-up and a real vehicle on a roller bench.

Main Results:

The field separation method successfully isolates direct sound fields from reflections.
Method performance is influenced by the surface impedance and wall reflection coefficients.
Successful identification of sound sources in both controlled mock-up and real-world vehicle measurements.
Demonstrated effectiveness of the 36-probe array implementation.

Conclusions:

The field separation method is efficient for sound source identification in challenging acoustic environments.
The technique provides a reliable way to assess the direct acoustic field radiated by a source.
Applicable to automotive acoustics and other scenarios with significant reflections.