Abstract
In this chapter we present the general guidelines for setting up measurement to get the desired accuracy and spatial resolution for the HELS-based NAH. There are several parameters that may influence the reconstruction results such as the number of measurement points, standoff distance, measurement aperture size versus source surface area, microphone spacing, and SNR. These parameters are generic for all NAH applications. The strategies for setting up the optimal measurement scheme are basically the same.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
B.P. Hildebrand, B.B. Brenden, An Introduction to Acoustical Holography (Plenum, New York, 1974)
E.G. Williams, J.D. Maynard, Holographic imaging without the wavelength resolution limit”. Phys. Rev. Lett. 45, 554–557 (1980)
V. Isakov, S.F. Wu, On theory and applications of the HELS method in inverse acoustics. Inverse Probl. 18, 1147–1159 (2002)
The MathWorks, Inc., MATLAB Documentation: MATLAB Function Reference, (The MathWorks, Inc., MATLAB R2007b, 2007)
National Instruments Corporation, LabVIEW Help: VI and Function Reference, (National Instruments Corporation, LabVIEW 8.6, 2008)
H. Lu, Reconstruction of vibroacoustic responses using Helmholtz equation least squares method, Ph.D. dissertation, Wayne State University, Detroit, Michigan, 2007
S. F. Wu, Noise Diagnostics Using Nearfield Acoustical Holography Seminar (Society for Automobile Engineering International, Short Course ID# C0607, 2007)
H. Lu, S.F. Wu, Reconstruction of vibroacoustic responses of a highly nonspherical structure using Helmholtz equation least-squares method. J. Acoust. Soc. Am. 125, 1538–1548 (2009)
C. E. Shannon, Communication in the presence of noise. Proc. Inst. Radio. Eng. 37, 10–21 (1949). Reprint as classic paper in Proceedings of IEEE, vol. 86, February 1998. pii: S 0018-9219(98)01299-7
S.M. Pandit, Modal and Spectrum Analysis: Data Dependent Systems in State Space (Wiley, New York, 1991)
P. Mohanty, D.J. Rixen, Operational modal analysis in the presence of harmonic excitation. J. Sound Vib. 270, 93–109 (2004)
H. Lord, W.S. Gatley, H.A. Evensen, Noise Control for Engineers (Krieger Publishing Company, Malabar, 1987)
E.G. Williams, H.D. Dardy, K.B. Washburn, Generalized nearfield acoustical holography for cylindrical geometry: theory and experiment. J. Acoust. Soc. Am. 81, 389–407 (1987)
E.G. Williams, H.D. Dardy, K.B. Washburn, Generalized nearfield acoustical holography for cylindrical geometry: theory and experiment. J. Acoust. Soc. Am. 81, 389–407 (1987)
E.G. Williams, H.D. Dardy, K.B. Washburn, Generalized nearfield acoustical holography for cylindrical geometry: theory and experiment. J. Acoust. Soc. Am. 81, 389–407 (1987)
E.G. Williams, H.D. Dardy, K.B. Washburn, Generalized nearfield acoustical holography for cylindrical geometry: theory and experiment. J. Acoust. Soc. Am. 81, 389–407 (1987)
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer Science+Business Media New York
About this chapter
Cite this chapter
Wu, S.F. (2015). Implementation of the HELS-Based NAH. In: The Helmholtz Equation Least Squares Method. Modern Acoustics and Signal Processing. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-1640-5_5
Download citation
DOI: https://doi.org/10.1007/978-1-4939-1640-5_5
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4939-1639-9
Online ISBN: 978-1-4939-1640-5
eBook Packages: EngineeringEngineering (R0)