An approach for predicting the reflected sound pressure is proposed in one-dimensional sound field. For a duct ended with a rigid reflective surface, only one microphone is required to measure the total sound pressure on the surface, which is further used as the error sensing strategy in an active noise control (ANC) system to reduce the in-duct reflection. Experiments are carried out to validate the prediction method, and a broadband feedforward ANC system is implemented to suppress the impulsive reflection. It is found that the ANC system based on the reflected sound prediction is effective, and 12.2 dB attenuation of the one-dimension impulsive reflection is obtained after the active control.
REFERENCES
1.
X.
Bao
, V. K.
Varadan
, V. V.
Varadan
, and T. R.
Howarth
, “Model of a bilaminar actuator for active acoustic control systems
,” J. Acoust. Soc. Am.
87
, 1350
–1352
(1990
).2.
T. R.
Howarth
, V. K.
Varadan
, X.
Bao
, and V. V.
Varadan
, “Piezocomposite coating for active underwater sound reduction
,” J. Acoust. Soc. Am.
91
, 823
–831
(1992
).3.
T. R.
Howarth
, X.
Bao
, R.
Moser
, V. K.
Varadan
, and V. V.
Varadan
, “Digital time delay network for an active underwater acoustic coating
,” J. Acoust. Soc. Am.
93
, 1613
–1619
(1993
).4.
L. D.
Lafleur
, F. D.
Shields
, and J. E.
Hendrix
, “Acoustically active surfaces using piezorubber
,” J. Acoust. Soc. Am.
90
, 1230
–1237
(1991
).5.
F. D.
Shields
and L. D.
Lafleur
, “Smart acoustically active surfaces
,” J. Acoust. Soc. Am.
102
, 1559
–1566
(1997
).6.
D.
Guicking
and K.
Karcher
, “Active impedance control for one-dimensional sound
,” J. Vibr. Acoust.
106
, 393
–396
(1984
).7.
F.
Orduña-Bustamante
and P. A.
Nelson
, “An adaptive controller for the active absorption of sound
,” J. Acoust. Soc. Am.
91
, 2740
–2747
(1992
).8.
J. P.
Smith
, B. D.
Johnson
, and R. A.
Burdisso
, “A broadband passive–active sound absorption system
,” J. Acoust. Soc. Am.
106
, 2646
–2652
(1999
).9.
J. J.
Finneran
and M. C.
Hastings
, “Active impedance control within a cylindrical waveguide for generation of low-frequency, underwater plane traveling waves
,” J. Acoust. Soc. Am.
105
, 3035
–3043
(1999
).10.
P.
Cobo
and M.
Cuesta
, “Hybrid passive-active absorption of a microperforated panel in free field conditions
,” J. Acoust. Soc. Am.
121
, EL251
–EL255
(2007
).11.
P.
Cobo
and M.
Cuesta
, “Measuring hybrid passive-active sound absorption of a microperforated liner at oblique incidence
,” J. Acoust. Soc. Am.
125
, 185
–190
(2009
).12.
H.
Zhu
, R.
Rajamani
, and K. A.
Stelson
, “Active control of acoustic reflection, absorption, and transmission using thin panel speakers
,” J. Acoust. Soc. Am.
113
, 852
–870
(2003
).13.
E.
Friot
and C.
Bordier
, “Real-time active suppression of scattered acoustic radiation
,” J. Sound Vib.
278
, 563
–580
(2004
).14.
J. M.
Munn
, B. S.
Cazzolato
, C. D.
Kestell
, and C. H.
Hansen
, “Virtual error sensing for active noise control in a one-dimensional waveguide: Performance prediction versus measurement
,” J. Acoust. Soc. Am.
113
, 35
–38
(2003
).15.
D.
Petersen
, A. C.
Zander
, B. S.
Cazzolato
, and C. H.
Hansen
, “Optimal virtual sensing for active noise control in a rigid-walled acoustic duct
,” J. Acoust. Soc. Am.
118
, 3086
–3093
(2005
).16.
C. D.
Petersen
, A. C.
Zander
, B. S.
Cazzolato
, and C. H.
Hansen
, “A moving zone of quiet for narrowband noise in a one-dimensional duct using virtual sensing
,” J. Acoust. Soc. Am.
121
, 1459
–1470
(2007
).17.
I.
Marshall
, “The production of acoustic impulses in air
,” Meas. Sci. Technol.
1
, 413
–418
(1990
).© 2010 Acoustical Society of America.
2010
Acoustical Society of America
You do not currently have access to this content.
