Errors and uncertainties of classical standing wave tube methods: SWR, TMTC and TMTM

Authors

  • Benoit Lanctot GAUS, Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke Que. JIK 2R1, Canada
  • Raymond Panneton GAUS, Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke Que. JIK 2R1, Canada
  • Noureddine Atalla GAUS, Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke Que. JIK 2R1, Canada

Keywords:

Absorption, Acoustic impedance, Atmospheric pressure, Random errors, Reflection, Systematic errors, Temperature, Standing wave tube methods

Abstract

An analysis on three classical standing wave tube methods is presented to compare the precision and identifying the sensitive parameters. The studied methods are standard wave ratio (SWR), two microphone three calibration method (TMTC), two microphone transfer method (TMTM). A differential formulation is used to evaluate the errors and uncertainties on each of the methods. The porous test sample is modeled as an equivalent fluid using the Johnson-Champoux-Allard model. The results obtained for the 25 mm thick polyamide foam are described.

Additional Files

Published

2000-09-01

How to Cite

1.
Lanctot B, Panneton R, Atalla N. Errors and uncertainties of classical standing wave tube methods: SWR, TMTC and TMTM. Canadian Acoustics [Internet]. 2000 Sep. 1 [cited 2025 Feb. 13];28(3):86-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1302

Issue

Vol. 28 No. 3 (2000)

Section

Proceedings of the Acoustics Week in Canada

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