Extrapolation of rotating sound fields

Michael Carley

doi:10.1121/1.5027249

Extrapolation of rotating sound fields

Michael Carley

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (SciVal)

189 Downloads (Pure)

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 language	English
Pages (from-to)	1623-1629
Number of pages	7
Journal	Journal of the Acoustical Society of America
Volume	143
Issue number	3
DOIs	https://doi.org/10.1121/1.5027249
Publication status	Published - 26 Mar 2018

ASJC Scopus subject areas

Arts and Humanities (miscellaneous)
Acoustics and Ultrasonics

Access to Document

10.1121/1.5027249

jasa17aSubmitted manuscript, 469 KB
jasa17a-revision
Copyright (2018) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in The Journal of the Acoustical Society of America vol.143 p.1623 and may be found at https://doi.org/10.1121/1.5027249.
Accepted author manuscript, 474 KB

Cite this

@article{7c275acd232d44cd83a2efc8fd4c005b,

title = "Extrapolation of rotating sound fields",

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-fieldassumption. ",

author = "Michael Carley",

year = "2018",

month = mar,

day = "26",

doi = "10.1121/1.5027249",

language = "English",

volume = "143",

pages = "1623--1629",

journal = "Journal of the Acoustical Society of America",

issn = "0001-4966",

publisher = "Acoustical Society of America",

number = "3",

}

TY - JOUR

T1 - Extrapolation of rotating sound fields

AU - Carley, Michael

PY - 2018/3/26

Y1 - 2018/3/26

N2 - 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-fieldassumption.

AB - 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-fieldassumption.

UR - http://www.scopus.com/inward/record.url?scp=85044680384&partnerID=8YFLogxK

U2 - 10.1121/1.5027249

DO - 10.1121/1.5027249

M3 - Article

SN - 0001-4966

VL - 143

SP - 1623

EP - 1629

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

IS - 3

ER -

Extrapolation of rotating sound fields

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this