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Related Experiment Videos

Driving rate effects on crackling noise.

Robert A White1, Karin A Dahmen

  • 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.

Physical Review Letters
|October 4, 2003
PubMed
Summary

Increasing the driving rate (Omega) in systems with crackling noise, like Barkhausen noise (BN), affects avalanche size and duration distributions. An exponent inequality helps determine when driving rate is relevant, as shown in BN experiments.

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Area of Science:

  • Physics
  • Complex Systems
  • Nonlinear Dynamics

Background:

  • Many physical systems exhibit crackling noise, characterized by avalanches or pulses of varying sizes.
  • Examples include Barkhausen noise in magnetic materials and seismic activity during earthquakes.

Purpose of the Study:

  • To investigate the impact of increasing driving rate (Omega) on the scaling properties of avalanche size and duration distributions.
  • To analyze the qualitative effects of driving rate on power spectra in crackling noise systems.

Main Methods:

  • Derivation of an exponent inequality to establish criteria for the relevance of the driving rate.
  • Application of theoretical findings to analyze recent experimental data on Barkhausen noise.

Main Results:

  • The driving rate (Omega) significantly influences the scaling behavior of avalanche size and duration distributions.
  • An exponent inequality was derived, providing a quantitative measure for the relevance of the driving rate.

Conclusions:

  • The driving rate is a crucial parameter affecting the dynamics of crackling noise systems.
  • The derived exponent inequality offers a valuable tool for analyzing and predicting system behavior under varying driving conditions.

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