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

Auteurs-es

  • 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

Mots-clés :

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

Résumé

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.

Fichiers supplémentaires

Publié-e

2000-09-01

Comment citer

1.
Lanctot B, Panneton R, Atalla N. Errors and uncertainties of classical standing wave tube methods: SWR, TMTC and TMTM. Canadian Acoustics [Internet]. 1 sept. 2000 [cité 4 mai 2026];28(3):86-7. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1302

Numéro

Vol. 28 No. 3 (2000)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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