article · The Journal of the Acoustical Society of America · 1992

The determination of the far field of an acoustic radiator from sparse measurement samples in the near field

Cited by 16Abstract and details only

Abstract

The near-field to far-field projection procedure here introduced has the following novel features. (1) The measured near-field samples do not need to belong to a separable coordinate surface. (2) The number of samples is, in principle, as small as the theoretical number of degrees of freedom of the far field, related to the dimensions of the source in wavelengths. (3) The samples do not need to belong to a regular grid. (4) If the projection is sought only within a limited angular sector, a further reduction of the number of measurement samples is possible. The technique is based on the identification from the measured data of an equivalent monopolar distribution of acoustic sources on a surface completely surrounding the radiator. The far field of these sources, straightforwardly computed, constitutes the estimate of the far field of the radiator. The identification is based on the pseudo inversion of the matrix representing the mapping of the equivalent sources into near-field samples, which is obtained by resorting to the singular value decomposition of the matrix. Representative results of the extensive numerical simulations are here included.

Cite this paper

APA 7

Borgiotti, G. V., & Rosen, E. M. (1992). The determination of the far field of an acoustic radiator from sparse measurement samples in the near field. The Journal of the Acoustical Society of America, 92(2), 807–818. https://doi.org/10.1121/1.403951

MLA 9

Borgiotti, Giorgio V., and Erik M. Rosen. “The determination of the far field of an acoustic radiator from sparse measurement samples in the near field.” The Journal of the Acoustical Society of America, vol. 92, no. 2, 1992, pp. 807–18, https://doi.org/10.1121/1.403951.

Chicago

Borgiotti, Giorgio V., and Erik M. Rosen. 1992. “The determination of the far field of an acoustic radiator from sparse measurement samples in the near field.” The Journal of the Acoustical Society of America 92 (2): 807–18. https://doi.org/10.1121/1.403951.

Harvard

Borgiotti, G.V. and Rosen, E.M. (1992) ‘The determination of the far field of an acoustic radiator from sparse measurement samples in the near field’, The Journal of the Acoustical Society of America, 92(2), pp. 807–818. Available at: https://doi.org/10.1121/1.403951.

BibTeX

@article{borgiotti1992determination,
  title = {{The determination of the far field of an acoustic radiator from sparse measurement samples in the near field}},
  author = {Borgiotti, Giorgio V. and Rosen, Erik M.},
  journal = {The Journal of the Acoustical Society of America},
  volume = {92},
  number = {2},
  pages = {807--818},
  year = {1992},
  doi = {10.1121/1.403951}
}

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