Simple methods for determination of the acoustical properties of ground surfaces

• Autorzy: Gołębiewski R.
• Języki publikacji: EN

Abstrakty

EN

The interactions between the sound wave and the ground surface belong to the most important phenomena determining the outdoor noise propagation. In the present study, the exact theory of noise propagation and two simple models of the ground effect are analysed. The paper presents a method of determination of the effective flow resistivity, based on the twochannel measurement of the sound level (the exact theory). For the simplied model of the ground effect, the adjustable parameters are given as a function of the effective ow resistivity. Similarly for the ground effect model given by ISO 9613, the dependence of the ground factor (as a function of the effective flow resistivity) is presented. Additionally, for a few selected types of ground surfaces, the values of the model parameters were determined.

Słowa kluczowe

EN

ground effect; noise propagation

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2007
• Tom: Vol. 32, No. 4
• Strony: 827--837
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Gołębiewski R.

• Adam Mickiewicz University Institute of Acoustics Umultowska 85, 61-614 Poznań, Poland

Bibliografia

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• [3] ATTENBOROUGH K., A comparison of engineering methods for predicting ground effect, [in:] Proceedings 2nd Convention of The European Acoustics Associations: Forum Acusticum, Berlin 14-19, 1999.
• [4] GOŁĘBIEWSKI R., MAKAREWICZ R., Engineering formulas for ground effects on broad-band noise, Applied Acoustics, 63, 993-1001 (2002).
• [5] DELANY M. E., BAZLEY E. N., Acoustical properties of fibrous absorbent materials, Applied Acoustics, 3, 105-116 (1970).
• [6] ATTENBOROUGH K., Acoustical impedance models for outdoor ground surfaces, Journal Sound and Vibration, 99, 4 (1985).
• [7] CHIEN C. F., SOROKA W. W., A note on the calculation of sound propagation along an impedance plane, Journal of Sound and Vibration, 69, 2, 340-343 (1980).
• [8] ÖGREN M, JONASSON H., Measurements of the acoustic impedance of ground, Sp Report 1998:28, 1998.
• [9] MAKAREWICZ R., KOKOWSKI P., Simplified model of the ground effect, J. Acoust. Soc. Am., 101, 372-376 (1997).
• [10] ANDERSON G. S., KURZE U. J., Outdoor sound propagation in noise and vibration control engineering, L.L. BERANEK and I.L. VER [Eds.],Wiley, p. 115, New York 1992.
• [11] ISO 9612-2. Attenuation of sound during propagation outdoors - Part 2. International Organization for Standarization, Geneva 1996.
• [12] Directive 2002/49/EC of the European Parliament and of the Council of 25 June 2002 relating to the assessment and management of environmental noise.
• [13] Mithra, Technical Manual, 0.1 dB.