Related Experiment Video
Updated: Feb 8, 2026
15:06
Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
Published on: January 3, 2016
13.4K
Separability of wave solutions in nonlinear brass instrument modelling
R L Harrison-Harsley1, S Bilbao1
1Acoustics and Audio Group, University of Edinburgh, Edinburgh, United Kingdom.
The Journal of the Acoustical Society of America
|July 2, 2018
Summary
This study examines traveling wave assumptions in brass instrument acoustics. Findings reveal small wave interactions in tubes and nonlinear backscattering due to area variations, impacting acoustic modeling.
Area of Science:
- Acoustics and Musical Instrument Physics
Background:
- Traveling wave models are standard for brass instrument acoustics, including nonlinear behavior.
- Real instrument geometries may violate assumptions underlying simplified traveling wave solutions.
Purpose of the Study:
- To investigate the validity of traveling wave assumptions in realistic brass instrument geometries.
- To analyze wave interactions and backscattering effects in specific geometric configurations.
Main Methods:
- Analysis of wave propagation in a cylindrical tube to assess forward and backward wave interaction.
- Investigation of nonlinear wave backscattering caused by cross-sectional area variations in a tube.
Main Results:
- A small degree of interaction between forward and backward traveling waves was observed in a cylindrical tube.
- Nonlinear backscattering of traveling waves was identified as a significant effect resulting from changes in tube cross-sectional area.
Conclusions:
- The study highlights limitations of idealized traveling wave models for real brass instruments.
- Geometric features like area variations can cause significant nonlinear wave phenomena, necessitating refined acoustic models.
Related Concept Videos
02:16Solution Formation
37.9K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
This selective...
37.9K
01:22Nonlinear Pharmacokinetics: Causes of Nonlinearity
740
Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
740
02:12The Wave Nature of Light
61.5K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.5K
01:13Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model
321
Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
321
01:12Instrument Calibration
769
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
769
01:25Instrumentation Amplifier
1.1K
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
1.1K