Abstract
It is shown that, in hydrodynamic noise measurements in the presence of acoustic noise acting upon the pressure fluctuation receiver, spatial filtering methods should provide the best results. Active methods are developed for suppressing the acoustic noise that affects a miniature receiver in the course of turbulent pressure fluctuation measurements. The methods are based on complicating the structure of the measuring transducer by introducing an extra compensating sensing element whose characteristics are identical with those of the main sensing element. The spatial filtering of small-scale turbulent pressure fluctuations by a finite-size electroacoustic transducer is used as the basis for the development of noise-compensated measuring systems, as well as methods of measuring the turbulent pressure fluctuations by receivers with noise compensation. A numerical study of the wave-number filtering of acoustic noise in wall pressure measurements by a noise-compensated receiver is performed.
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References
E. B. Kudashev, Akust. Zh. 49, 215 (2003) [Acoust. Phys. 49, 176 (2003)].
E. B. Kudashev and I. D. Vereb’evskii, Tr. Metrolog. Inst. SSSR, No. 157(217), 101 (1975).
E. B. Kudashev, Izv. Vses. Nauchno-Issled. Inst. Gidrotekh. im. B.E. Vedeneeva 190, 91 (1986).
E. B. Kudashev and L. R. Yablonik, Akust. Zh. 32, 127 (1986) [Sov. Phys. Acoust. 32, 78 (1986)].
E. B. Kudashev and L. R. Yablonik, Izv. Vyssh. Uchebn. Zaved., Energ., No. 2, 72 (1986).
E. B. Kudashev and L. R. Yablonik, Izv. Vyssh. Uchebn. Zaved., Energ., No. 8, 77 (1986).
I. Ya. Miniovich, A. D. Pernik, and V. S. Petrovskiii, Hydrodynamic Sources of Sound (Sudostroenie, Leningrad, 1972).
G. Corcos, J. Acoust. Soc. Am. 35, 192 (1963).
A. A. Veip, E. B. Kudashev, V. S. Petrovskii, and V. M. Tkachenko, in Proceedings of III All-Union Convention on Theoretical and Applied Mechanics (Nauka, Moscow, 1968), p. 65.
R. B. Gilchrist and W. A. Strawderman, J. Acoust. Soc. Am. 38, 298 (1965).
E. B. Kudashev and L. R. Yablonik, USSR Inventor’s Certificate No. 723418, Byull. Izobret., No. 11 (1980).
E. B. Kudashev, in Proceedings of International Symposium on Nonlinear Acoustics ISNA-16 (Moscow, 2002).
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In memory of L.M. Lyamshev
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Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 49, No. 5, 2003, pp. 644–649.
Original Russian Text Copyright © 2003 by Kudashev.
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Kudashev, E.B. Suppression of acoustic noise in the measurements of wall pressure fluctuations. Acoust. Phys. 49, 545–549 (2003). https://doi.org/10.1134/1.1608979
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DOI: https://doi.org/10.1134/1.1608979