Near-field acoustic holography and non-negative intensity for prediction of sound radiation

Daipei Liu, Zdeněk Havránek, Herwig Peters, Steffen Marburg, Nicole Kessissoglou

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

In this work, near-field acoustic holography and non-negative intensity methods are used to predict the radiated sound of a vibrating structure. Near-field acoustic holography (NAH) is an experimental technique to reconstruct the acoustic field on the surface of the structure. The sound pressure field was measured using a microphone array close to the structural surface. The normal velocity of the plate was also measured. Supersonic intensity was calculated using experimental data based on the NAH measurements. Non-negative intensity is a quantity which allows the surface contributions of a vibrating structure to the radiated sound based on acoustic radiation modes to be predicted. An example of a point driven plate is used to compare these two source localization techniques. Results show that both techniques are successful in predicting the sound radiation patterns and yield similar results for all frequencies considered.

Original languageEnglish
StatePublished - 2015
EventAcoustics 2015 Hunter Valley - Hunter Valley, Australia
Duration: 15 Nov 201518 Nov 2015

Conference

ConferenceAcoustics 2015 Hunter Valley
Country/TerritoryAustralia
CityHunter Valley
Period15/11/1518/11/15

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