Estimation of Acoustic Impedance for Surfaces Delimiting the Volume of an Enclosed Space

Open access

Abstract

Several methods can be applied for analyses of the acoustic field in enclosed rooms namely: wave propagation, geometrical or statistical analysis. The paper presents problems related to application of the boundary elements method to modelling of acoustic field parameters. Experimental and numerical studies have been combined for evaluation of acoustic impedance of the material used for the walls of a model room. The experimental studies have been carried out by implementing a multichannel measuring system inside the constructed model of an industrial room. The measuring system allowed simultaneous measurements of the source parameters - the loudspeaker membrane vibration speed, the acoustic pressure values in reception points located inside the model space as well as phase shifts between signals registered in various reception points. The numerical modelling making use of the acoustic pressure values measured inside the analyzed space allowed determination of requested parameters of the surface at the space boundary.

Alba J., del Rey R., Ramis J., Arenas J.P. (2011), An inverse method to obtain porosity, fibre diameter and density of fibrous sound absorbing materials, Archives of Acoustics, 36, 3, 561-574.

Björk Å., Dahlquist G. (1974), Numerical methods, Prentice-Hall.

Ciskowski R.D., Brebbia C.A. (1991), Boundary element methods in acoustics, Elsevier, London-New York.

Gołaś A. (1995), Computer methods in interior and environmental acoustics [in Polish], AGH, Cracow.

Kincaid D., Cheney W. (2002), Numerical analysis, Mathematics of Scientific Computing, Third Edition, The Wadsworth Group, Brooks/Cole.

Kirkup S. (1998), The boundary element method in acoustics (Integral Equation Methods in Engineering), Integrated Sound Software.

Kosała K. (2008), Global index of the acoustic quality of sacral buildings at incomplete information, Archives of Acoustics, 33, 2, 165-183.

Kuttruff H. (1991), Room Acoustics, Elsevier Applied Science, London - New York.

Piechowicz J. (2007a), Determination of acoustic fields in industrial room, Archives of Acoustics, 32, 2, 313-319.

Piechowicz J. (2007b), Acoustic field in the mechanical workshop, Archives of Acoustics, 32, 4, 221-226.

Piechowicz J. (2011), Estimating surface acoustic impedance with the inverse method, International Journal of Occupational Safety and Ergonomics, 17, 3, 271-276.

Weyna S. (2007), Some comments about the existing theory of sound with comparison to the experimental research of vector effects in real-life acoustic near fields, Archives of Acoustics, 32, 4, 859-870.

Archives of Acoustics

The Journal of Institute of Fundamental Technological of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.816
5-year IMPACT FACTOR: 0.835

CiteScore 2016: 1.15

SCImago Journal Rank (SJR) 2016: 0.432
Source Normalized Impact per Paper (SNIP) 2016: 0.948

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 112 75 9
PDF Downloads 61 52 6