Practical considerations in reconstructing the surface vibration using inverse numerical acoustics

F. Martinus, D. W. Herrin, A. F. Seybert

Research output: Contribution to journalConference articlepeer-review

22 Scopus citations


This paper explores the use of inverse numerical acoustics to reconstruct the surface vibration of a noise source. Inverse numerical acoustics is mainly used for source identification. This approach uses the measured sound pressure at a set of field points and the Helmholtz integral equation to reconstruct the normal surface velocity. The number of sound pressure measurements is considerably less than the number of surface vibration nodes. A brief guideline on choosing the number and location of the field points to provide an acceptable reproduction of the surface vibration is presented. The effect of adding a few measured velocities to improve the accuracy will also be discussed. Other practical considerations such as the shape of the field point mesh and effect of experimental errors on reconstruction accuracy will be presented. Examples will include a diesel engine and a transmission housing.

Original languageEnglish
JournalSAE Technical Papers
StatePublished - 2003
EventNoise and Vibration Conference and Exhibition - Traverse City, MI, United States
Duration: May 5 2003May 8 2003

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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