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

Echo

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then the...

$Influence of Earth's Curvature and Atmospheric Refraction on Leveling$ 01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...

Plane Electromagnetic Waves II

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.

Plane Electromagnetic Waves I

Plane Electromagnetic Waves I

The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...

Reflection of Waves

Reflection of Waves

When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...

You might also read

Related Articles

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

Sort by

Same author

Introduction to the special issue on assessing sediment heterogeneity on continental shelves and slopesa).

The Journal of the Acoustical Society of America·2025

Same author

Deep sediment heterogeneity inferred using very low-frequency features from merchant shipsa).

The Journal of the Acoustical Society of America·2024

Same author

Feature-based maximum entropy for geophysical properties of the seabeda).

The Journal of the Acoustical Society of America·2024

Same author

Inference of source signatures of merchant ships in shallow ocean environmentsa).

The Journal of the Acoustical Society of America·2024

Same author

Deep Neural Networks for Human's Fall-risk Prediction using Force-Plate Time Series Signal.

Expert systems with applications·2022

Same author

Maximum entropy inference of seabed properties using waveguide invariant features from surface ships.

The Journal of the Acoustical Society of America·2022

Search research articles

Related Experiment Video

Updated: Jul 17, 2026

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

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

Published on: May 1, 2018

Geoacoustic inversion of short range source data using a plane wave reflection coefficient approach.

S A Stotts¹, D P Knobles, J A Keller

¹Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.

The Journal of the Acoustical Society of America

|January 18, 2007

Summary

This study demonstrates that isolating bottom-interacting acoustic paths is crucial for accurate geoacoustic parameter inversion in shallow lake environments. This method refines models and predicts sound transmission loss effectively.

More Related Videos

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces

Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces

Published on: July 26, 2016

Related Experiment Videos

Last Updated: Jul 17, 2026

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

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

Published on: May 1, 2018

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces

Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces

Published on: July 26, 2016

Area of Science:

Underwater acoustics
Geoacoustics
Environmental acoustics

Background:

Shallow, hard-bottom lake environments present unique challenges for acoustic propagation modeling.
Accurate geoacoustic parameter estimation is vital for understanding sound behavior in aquatic settings.

Purpose of the Study:

To investigate the effectiveness of matched field inversions for characterizing a shallow Texas lake's geoacoustic properties.
To determine the essential role of bottom-interacting paths in reducing parameter uncertainty.

Main Methods:

Collected acoustic time series data using short and long-range implosive and explosive sources.
Performed matched field inversions with simulated annealing and a validated forward propagation model.
Isolated bottom-interacting paths to refine geoacoustic parameter estimation.

Main Results:

Isolating bottom-interacting paths significantly reduced parameter uncertainties in the hard-bottom lake environment.
The inversion approach successfully established the number of layers needed to model the environment.
Modeled transmission loss closely matched measured data, validating the inversion methodology.

Conclusions:

The study confirms the necessity of considering bottom-interacting paths for accurate geoacoustic inversion in shallow, hard-bottom environments.
Geoacoustic parameters derived from low-frequency data can reliably predict transmission loss at higher frequencies and longer ranges.
The developed inversion technique provides a systematic approach for characterizing complex aquatic acoustic environments.