Separation of radiated sound field components from waves scattered by a source under non-anechoic conditions.

Efren Fernandez Grande (Invited author), Finn Jacobsen (Invited author)

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Abstract

A method of estimating the sound field radiated by a source under non-anechoic conditions has been examined. The method uses near field acoustic holography based on a combination of pressure and particle velocity measurements in a plane near the source for separating outgoing and ingoing wave components. The outgoing part of the sound field is composed of both radiated and scattered waves. The method compensates for the scattered components of the outgoing field on the basis of the boundary condition of the problem, exploiting the fact that the sound field is reconstructed very close to the source. Thus the radiated free-field component is estimated simultaneously with solving the inverse problem of reconstructing the sound field near the source. The method is particularly suited to cases in which the overall contribution of reflected sound in the measurement plane is significant.
Original languageEnglish
Title of host publicationProceedings of Inter-Noise 2010
Publication date2010
Publication statusPublished - 2010
Event39th International Congress and Exposition on Noise Control Engineering - Lisbon, Portugal
Duration: 15 Jun 201016 Jun 2010
Conference number: 39
http://www.spacustica.pt/internoise2010/

Conference

Conference39th International Congress and Exposition on Noise Control Engineering
Number39
Country/TerritoryPortugal
CityLisbon
Period15/06/201016/06/2010
Internet address

Keywords

  • Sound field separation
  • Near-field Acoustic Holography (NAH)
  • Sound radiation

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