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Related Concept Videos

Intensity and Pressure of Sound Waves01:05

Intensity and Pressure of Sound Waves

The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
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Sound Intensity

The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the emitted...
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Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
08:51

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Published on: May 10, 2019

An introduction to wave intensity analysis.

Kim H Parker1

  • 1Department of Bioengineering, Imperial College, London, UK. k.parker@imperial.ac.uk

Medical & Biological Engineering & Computing
|February 12, 2009
PubMed
Summary
This summary is machine-generated.

Wave intensity analysis quantifies cardiovascular wave dynamics using pressure and velocity data. This method helps understand energy transfer and wave components in the circulatory system.

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Last Updated: Jun 25, 2026

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
08:51

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Published on: May 10, 2019

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
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Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

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Semi-Automated Analysis of Peak Amplitude and Latency for Auditory Brainstem Response Waveforms Using R

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Area of Science:

  • Cardiovascular Physiology
  • Fluid Dynamics
  • Biomedical Engineering

Background:

  • Cardiovascular haemodynamics involves complex wave phenomena.
  • Understanding wave propagation is crucial for diagnosing cardiovascular conditions.

Purpose of the Study:

  • To adapt gas dynamics methods for analyzing cardiovascular wave intensity.
  • To provide a framework for quantifying wave timing, direction, and magnitude.

Main Methods:

  • Utilizing the method of characteristics for 1-D equations in elastic vessels.
  • Analyzing pressure (P) and velocity (U) waveforms to determine wave intensity (dPdU).
  • Calculating wave speed (c) using PU-loop and sum of squares methods.

Main Results:

  • Wave intensity analysis separates forward and backward pressure and velocity components.
  • Net wave intensity (dPdU) quantifies energy flux per unit area.
  • The reservoir-wave hypothesis is discussed in relation to arterial and venous pressures.

Conclusions:

  • Wave intensity analysis offers a robust method for studying cardiovascular haemodynamics.
  • This technique aids in understanding the interplay between reservoir pressure and wave dynamics.
  • It provides insights into the Windkessel effect and wave contributions to pressure waveforms.