Phys. Rev. Lett. 91, 085702 (2003) [4 pages]Driving Rate Effects on Crackling NoiseReceived 6 February 2002; published 21 August 2003 Many systems respond to slowly changing external conditions with crackling noise, created by avalanches or pulses with a broad range of sizes. Examples range from Barkhausen noise (BN) in magnets to earthquakes. In this Letter, we discuss the effects of increasing driving rate Ω on the scaling behavior of the avalanche size and duration distributions as well as qualitative effects of Ω on the power spectra. We derive an exponent inequality as a criteria for the relevance of Ω. To illustrate these general results, we use recent experiments on BN as a successful example. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.085702
DOI:
10.1103/PhysRevLett.91.085702
PACS:
75.60.Ej, 05.40.–a, 64.60.Ht
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