Extrapolation of rotating sound fields

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Abstract

A method is presented for the computation of the acoustic field around a tonal circular source, such as a rotor or propeller, based on an exact formulation which is valid in the near and far fields. The only input data required are the pressure field sampled on a cylindrical surface surrounding the source, with no requirement for acoustic velocity or pressure gradient information. The formulation is approximated with exponentially small errors and appears to require input data at a theoretically minimal number of points. The approach is tested numerically, with and without added noise, and demonstrates excellent performance, especially when compared to extrapolation using a far-field
assumption.
Original languageEnglish
Pages (from-to)1623-1629
Number of pages7
JournalJournal of the Acoustical Society of America
Volume143
Issue number3
DOIs
Publication statusPublished - 26 Mar 2018

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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