The secondary-edge-source method (SESM) has found widespread application in predicting edge diffraction. The method, however, is limited to point sources. Based on the concept of weighted summation of diffractive contribution from each propagation path, this letter extends the SESM to directional sources with equivalent acoustic centers. The validity of the proposed method is demonstrated by comparing theoretical results to those obtained using the omnidirectional monopole superposition method.
References
1.
J. E.
Summers
, “Inaccuracy in the treatment of multiple-order diffraction by secondary-edge-source methods
,” J. Acoust. Soc. Am.
133
(6
), 3673
–3676
(2013
).2.
J.
Gu
, X.
Feng
, and Y.
Shen
, “Calculation of the insertion loss of barriers on rigid ground in the time domain
,” Appl. Sci.
12
(4
), 2018
(2022
).3.
H.
Medwin
, “Shadowing by finite noise barriers
,” J. Acoust. Soc. Am.
69
(4
), 1060
–1064
(1981
).4.
J.
Gu
, Y.
Shen
, and X.
Feng
, “Comments on ‘A diffractive study on the relation between finite baffle and loudspeaker measurement
,’ ” J. Audio Eng. Soc.
69
(5
), 294
–296
(2021
).5.
Y.
Le
, Y.
Shen
, and J.
Xia
, “A diffractive study on the relation between finite baffle and loudspeaker measurement
,” J. Audio Eng. Soc.
59
(12
), 944
–952
(2011
).6.
J.
Huang
, J.
Gu
, X.
Feng
, and Y.
Shen
, “Diffraction effects of IEC63034 standard micro-baffle on the frequency response measurements of microspeakers
,” Appl. Sci.
12
(3
), 1420
(2022
).7.
H. E.
Zidan
and U. P.
Svensson
, “Influence of a table on a microphone's frequency response and directivity
,” J. Audio Eng. Soc.
61
(1/2
), 70
–74
(2013
).8.
M. A.
Biot
and I.
Tolstoy
, “Formulation of wave propagation in infinite media by normal coordinates with an application to diffraction
,” J. Acoust. Soc. Am.
29
(3
), 381
–391
(1957
).9.
H.
Medwin
, E.
Childs
, and G. M.
Jebsen
, “Impulse studies of double diffraction: A discrete Huygens interpretation
,” J. Acoust. Soc. Am.
72
(3
), 1005
–1013
(1982
).10.
U. P.
Svensson
, R. I.
Fred
, and J.
Vanderkooy
, “An analytic secondary source model of edge diffraction impulse responses
,” J. Acoust. Soc. Am.
106
(5
), 2331
–2344
(1999
).11.
U. P.
Svensson
and P. T.
Calamia
, “Edge-diffraction impulse responses near specular-zone and shadow-zone boundaries
,” Acta Acust. united Acust.
92
(4
), 501
–512
(2006
).12.
M.
Buret
, K. M.
Li
, and K.
Attenborough
, “Diffraction of sound from a dipole source near to a barrier or an impedance discontinuity
,” J. Acoust. Soc. Am.
113
(5
), 2480
–2494
(2003
).13.
P.
Menounou
and E.
Papaefthymiou
, “Shadowing of directional noise sources by finite noise barriers
,” Appl. Acoust.
71
, 351
–367
(2010
).14.
P.
Menounou
and P.
Nikolaou
, “An extension to the directive line source model for diffraction by half planes and wedges
,” Acta Acust. united Acust.
102
(2
), 307
–321
(2016
).15.
U. P.
Svensson
, P. T.
Calamia
, and S.
Nakanishi
, “Frequency-domain edge diffraction for finite and infinite edges
,” Acta Acust. united Acust.
95
(3
), 568
–572
(2009
).16.
J.
Cheng
, The Principle of Acoustics
, Chinese
ed. (Science
, Beijing
, 2012
), pp. 94
–124
, 191–193.17.
J. W. S.
Rayleigh
, The Theory of Sound
(Macmillan
, London
, 1896
) [reprinted by Dover, New York, 1945], Vol. 2, Secs. 278, 302.18.
S. R.
Martin
and U. P.
Svensson
, “Double diffraction models: A study for the case of non-convex bodies
,” in Proceedings of the Forum Acusticum
, Krakow, Poland (September 7–12, 2014
).19.
J.
Vanderkooy
, “The low-frequency acoustic center: Measurement, theory, and application
,” in Proceedings of the AES 128th Convention
, London, UK (May 22–25, 2010
).© 2023 Acoustical Society of America.
2023
Acoustical Society of America
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