About Some Misunderstandings in the Modern Theory of the Sound Isolation and Discrete Models of Sound Transmission

Abstract:

The present paper is a short critical review of the modern theory of the sound isolation by single-layered protections. It is shown that dependence of insulation upon angle of sound incidence is untenable. The author disproves existence possibility of «spatial frequency resonance» at wave coincidence and of « loss coefficient of a design» defining the abatement of the sound isolation on resonances.The substantiation of application of discrete models of sound transmission through a plate, in which the equations of laws of conservation of momentum and kinetic energy are used, is explained. On the basis of discrete models is offered a practical way of calculation of the sound isolation, not conceding accuracy to modern standard methods, but distinguishing itself in a greater universality and simplicity.

• Periodical: Applied Mechanics and Materials (Volume 467)
• Pages: 361-366
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.467.361
• Online since: December 2013
• Authors: Arkadi Zakharov
• Keywords: Calculation Method, Discrete Models of Sound Transmission, Resulted Weight, Sound Isolation by Single-Layered Designs, Sound Isolation Decrease on Resonances, Wave Coincidence

References

[1] V.I. Zaborov: Sound insulation theory of protecting designs, M. PH Stroyizdat (1969), p.180.

[2] V.N. Nikolsky and V. I. Zaborov: Sound insulation of large-panel buildings, M PH Stroyizdat(1964), p.244.

[3] A.V. Zakharov: Isolation calculations of airborne sound by homogeneous protecting designs, Report at the 3rd National Conference on Noise Abatement. Pub. Organizing Committee of the Conference, Bulgaria, Varna, (1973). pp.63-68.

[4] A.V. Zakharovand D. R. Ruziev: On the issue of spectrum of vibration insulation calculations of the mechanisms established on building designs, Proceedings of the Academy of Sciences of the Tadjik Soviet Socialist Republic, Branch of Physical and Mathematical, and Geological-and-chemical Sciences, № 3 (65), PH Donish, Dushanbe (1977).

[5] A.V. Zakharovand R. Kh. Pirmatov: A practical method of isolation calculations of air sound by single-layered protecting designs, Proceedings of the Academy of Sciences of the Tadjik Soviet Socialist Republic, Branch of Physical and Mathematical, and Geological-and -chemical Sciences, № 2 (88), PH Donish, Dushanbe(1983).

[6] V.M. Razzhivin: Influence of a way of fastening on sound insulation by light protections, Theses of Reports at the 5th Theoretical and Practical Conference of Young Scientists and Experts of the Central Research Institute of Industrial Buildings. Pub. Organizing Committee of the Conference, M (1986).

[7] Set of Rules 23-103-2003 Projecting of the sound insulation of protecting designs of domestic and public buildings, PH Gosstroy of Russia, M(2004), p.34.

[8] G.L. Osipov: Noise and sound Insulation, PH Stroyizdat, M (1967), p.104.

[9] Projector handbook. Protection against noise, edited by E. J. Judin. Stroyizdat. M. (1974).

[10] M.S. Sedov: Sound insulation of the lightened protecting designs of buildings, DPhil dissertation. Gorky (1971), p.343.

[11] W. Fasold and E. Sonntag: The designing theory on basis of building physics 4 - Building Acoustics, Rudolf Müller Publishing House, Cologne-Braunsfeld(1972), p.256.

[12] L. Cremer: The theory of sound insulation of cylindrical shells, Acustica, 5, Nr. 5 (1952), pp.245-256.

[13] M. Heckl: Sound insulation of homogeneous simple walls of the final area, Acustica, Vol. 10, Nr. 2 (1960), pp.98-108.

[14] R. Josse and C. Lamure: Sound transmission through a simple wall, Acustica, Nr. 14(1964), p.226.

[15] B.G. Waters: Transmission Loss of Some Masonry Walls, J. Acoust. Soc. Am. Volume 31, Issue 7 (1959), pp.27-42.