Related Experiment Video
Updated: Apr 6, 2026
07:36
Studying Cavitation Enhanced Therapy
Published on: April 9, 2021
6.0K
A computational method to predict and study underwater noise due to pile driving
Scott Schecklman1, Nathan Laws1, Lisa M Zurk1
1Electrical and Computer Engineering, Portland State University, Portland, Oregon 97201, USA.
The Journal of the Acoustical Society of America
|August 3, 2015
Summary
This study introduces a hybrid model to predict underwater noise from pile driving in shallow waters. The model accurately simulates sound propagation and validates findings with real-world acoustic observations.
Area of Science:
- Underwater acoustics
- Environmental acoustics
- Wave propagation modeling
Background:
- Pile driving is a significant source of underwater noise, impacting marine environments.
- Predicting sound propagation in shallow, inhomogeneous waters presents considerable challenges.
Purpose of the Study:
- To develop and validate a hybrid model for predicting underwater noise from pile driving.
- To assess the influence of environmental factors on sound propagation over long ranges.
Main Methods:
- A hybrid modeling approach combining the parabolic equation (PE) with an empirical source model.
- Simulation of the pile source using a phased point source array.
- Coupling the source model with a broadband PE wave propagation model incorporating range-dependent geoacoustic properties and bathymetry.
Main Results:
- Model simulations demonstrated good agreement with acoustic observations of pile driving in the Columbia River.
- The model successfully predicted underwater sound levels in variable riverine environments.
Conclusions:
- The hybrid PE model is effective for studying and predicting underwater noise from pile driving in complex environments.
- Environmental factors like bathymetry and sediment significantly influence underwater sound levels.
Related Concept Videos
01:21Impact Strength of Concrete
703
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it...
703
01:30Typical Model Studies
684
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
684
00:53Sound Waves: Interference
5.1K
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...
5.1K
01:26Unsoundness of Aggregate due to Volume Change
480
Unsoundness in aggregates due to volume changes is primarily caused by the physical alterations aggregates undergo, such as freezing and thawing, thermal changes, and wetting and drying. Unsound aggregates, when subjected to these changes, result in volume change upon disintegration. This, in turn, contributes to the deterioration of concrete, including scaling, pop-outs, and cracking. Particular types of aggregates, such as porous flints, cherts, and those containing clay minerals, are...
480