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

Buoyancy and Stability for Submerged and Floating Bodies

Buoyancy and Stability for Submerged and Floating Bodies

In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...

Perception of Sound Waves

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...

You might also read

Related Articles

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

Sort by

Same author

Underwater ultra-low frequency seismic source.

The Journal of the Acoustical Society of America·2021

Same author

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration.

Chemical engineering journal (Lausanne, Switzerland : 1996)·2018

Same author

Equations for normal-mode statistics of sound scattering by a rough elastic boundary in an underwater waveguide, including backscattering.

The Journal of the Acoustical Society of America·2017

Same author

Entropy rate defined by internal wave scattering in long-range propagation.

The Journal of the Acoustical Society of America·2015

Same author

Per-survivor processing for underwater acoustic communications with direct-sequence spread spectrum.

The Journal of the Acoustical Society of America·2013

Same author

Deterministic forward scatter from surface gravity waves.

The Journal of the Acoustical Society of America·2012

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

A Stable Phantom Material for Optical and Acoustic Imaging

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Modal processing for acoustic communications in shallow water experiment.

Andrey K Morozov, James C Preisig, Joseph Papp

The Journal of the Acoustical Society of America

|December 3, 2008

Summary

Broadband mode decomposition effectively reduces underwater acoustic channel delay spread. This method concentrates signal energy, enabling reliable communication even with internal wave interference.

More Related Videos

Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter

Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter

Published on: June 14, 2024

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: Jun 27, 2026

A Stable Phantom Material for Optical and Acoustic Imaging

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter

Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter

Published on: June 14, 2024

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:

Underwater acoustics
Signal processing
Oceanography

Background:

Shallow water environments present significant challenges for acoustic communication due to multipath propagation.
Channel delay spread in underwater acoustic channels can degrade signal quality and limit data rates.

Purpose of the Study:

To evaluate the feasibility of broadband mode decomposition as a preprocessing technique.
To reduce the effective channel delay spread in shallow water acoustics.
To concentrate received signal energy into fewer independent channels.

Main Methods:

Processing acoustical array data from the Shallow Water Acoustics experiment.
Utilizing a vertical array designed at the Woods Hole Oceanographic Institution.
Transmitting Phase-shift Keying (PSK) m-sequence modulated signals with varying carrier frequencies over a 19.2 km distance.

Main Results:

Demonstrated the feasibility of broadband mode decomposition.
Successfully reduced the effective channel delay spread.
Concentrated received signal energy into a small number of independent channels.
Achieved a low bit error rate despite strong internal wave activity.

Conclusions:

Broadband mode decomposition is a viable preprocessing method for underwater acoustic communication.
The technique enhances signal robustness in challenging shallow water conditions.
Effective communication is possible even during periods of significant environmental disturbance.