Abstract
We consider the problem of separating and reconstructing the sound field radiated by a planar source, e.g. a vibrating plate, that faces a parallel reflector. For this purpose we propose a Fourier-based technique to process near-field microphone array measurements that are performed on a single plane between the plate and the reflector. A closed-form expression is derived in the wavenumber domain to recover the free-space sound field radiated by the plate. The fundamental assumption is that the plate scatters sound in a locally-reacting fashion. Overall, provided the admittances of the plate and the reflecting surface are known, the results demonstrate that it is possible to recover the free-field sound radiated by the plate with a reasonable accuracy.
| Original language | English |
|---|---|
| Pages (from-to) | 181-191 |
| Number of pages | 11 |
| Journal | Applied Acoustics |
| Volume | 149 |
| DOIs | |
| Publication status | Published - 1 Jun 2019 |
Funding
The authors would like to acknowledge the anonymous reviewers for their valuable comments and suggestions. The first author would like to acknowledge the technical assistance with the experimental setup of Danilo Prelevic, Jens Sjölander and Luck Peerlings, affiliated to the Department of Aeronautical and Vehicle Engineering, KTH. This research is financially supported by the Swedish Research Council (Vetenskapsrådet) under Grant Nos. 2012-3723 and 2016-04366. Appendix A
Keywords
- NAH
- Planar sources
- Reverberant environments
- Sound field separation
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