The effect of high-amplitude sound on the attenuation of perforated tube silencers

  • Dickey N
  • Selamet A
  • Novak J
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Abstract

A time-domain computational approach is applied to investigate the behavior of perforated tube silencers at high sound levels. The one-dimensional computational technique employs a lumped parameter model for the perforate flows. The lumped parameter perforate model is based on time-invariant approximations for the equivalent length leq and resistance R, consistent with the use of a nonlinear perforate impedance. Empirical expressions for leq and R are developed experimentally using nondimensional scaling parameters. The model is applied to geometries representative of automotive resonators and multiple-duct mufflers. Conditions are simplified from those in an actual automotive system by considering single-frequency excitation and zero mean flow. Simulations with linear perforate behavior are compared to experimental data obtained with an extended impedance tube system. Simulations with nonlinear perforate behavior for one concentric tube resonator are compared to published experimental data.

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CITATION STYLE

APA

Dickey, N. S., Selamet, A., & Novak, J. M. (2000). The effect of high-amplitude sound on the attenuation of perforated tube silencers. The Journal of the Acoustical Society of America, 108(3), 1068–1081. https://doi.org/10.1121/1.1287707

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