Е-Публикации
Технически университет - София

Абстракт: В работата се изследва експериментално нивото на акустичния шум и честотното разпределение на звукопоглъщане на обикновени и комбинирани прегради за акустичен шум. За сравнение на резултатите, са използвани и такива прегради, за които има данни в литературата. Въз основа на анализа на резултатите са направени изводи за приложимостта на преградите в зависимост от честотния им диапазон и степента на звукопоглъщане.

Библиография

1. Банов, С., Ив. Кралов, Шум в транспортната техника, ТУ-София, 2003
2. Чешанков, Б., Теория на трептенията, София, 1991
3. Кралов, Ив., Г. Полихронов, Д. Атанасов, Влияние на граничните условия върху собствените честоти на оребрени тънки мембрани, Международна конференция MOTAUTO’06, Варна, 2006
4. Клюкин, И., А. Колесников, Акустические измерения в судостроении, Ленинград, 1982
5. Amédin, C. K., Y. Champoux, A. Berry, Acoustical characterisation of absorbing porous materials through transmission measurements in the free field, Journal of the Acoustic Society of America, Vol. 102(2), pp. 1982–1994, 1997
6. Attenborough, K., Acoustical characteristics of rigid fibrous absorbents and granular materials, Journal of the Acoustical Society of America, Vol. 73(3), pp. 785–99, 1983
7. Auregan, Y., M. Pachebat, Measurement of the nonlinear behaviour of acoustical rigid porous materials, Physics of Fluids, Vol. 11, pp. 1342–1345, 1999
8. Cox, T. J., D’Antonio, P., Acoustic Absorbers and Difusers, Taylor & Francis, USA, 2009
9. Gorman, G., Free Vibration Analysis of Rectangular Plates, Elsevier, NH, USA, 1982
10. BS EN ISO 354:2003, Acoustics – measurement of sound absorption in a reverberation room
11. ISO 10534-2:1998, Acoustics – determination of sound absorption coefficient and impedance in impedance tubes. Part 1: Method using standing wave ratio
12. ISO 10534-2:1998, Acoustics – determination of sound absorption coefficient and impedance in impedance tubes. Part 2: Transfer-function method
13. Nocke, C., V. Mellert, Brief review on in situ measurement techniques of impedance or absorption, Proceedings Forum Acusticum, Sevilla, 2002
14. Ohayon, R., C. Soize, Structural Acoustics and Vibration, Academic Press Limited, London, 1998
15. Soedel, M., Vibrations of Shells and Plates, Marcel Decker Inc., IN, USA, 1982.
16. Tayong, R., Dupont, T., Leclaire, P., Experimental investigation of holes interaction effect on the sound absorption coefficient of micro-perforated panels under high and medium sound levels, Applied Acoustics, Elsevier, Vol. 72, pp. 777-784, 2011

Издание

Издателските права се държат от Технически университет - София

Abstract: In this investigation it was made an experimental investigation about the level and frequency distributed sound absorption of normal and combined barriers for acoustic noise. Barriers with parameters given in the scientific literature are used for comparison and estimation of the new-barriers advantages. On the base of the analysis of the results it were made conclusions about the noise level reduction as well as the frequency range they could be used with high degree of efficiency

References

1. Банов, С., Ив. Кралов, Шум в транспортната техника, ТУ-София, 2003
2. Чешанков, Б., Теория на трептенията, София, 1991
3. Кралов, Ив., Г. Полихронов, Д. Атанасов, Влияние на граничните условия върху собствените честоти на оребрени тънки мембрани, Международна конференция MOTAUTO’06, Варна, 2006
4. Клюкин, И., А. Колесников, Акустические измерения в судостроении, Ленинград, 1982
5. Amédin, C. K., Y. Champoux, A. Berry, Acoustical characterisation of absorbing porous materials through transmission measurements in the free field, Journal of the Acoustic Society of America, Vol. 102(2), pp. 1982–1994, 1997
6. Attenborough, K., Acoustical characteristics of rigid fibrous absorbents and granular materials, Journal of the Acoustical Society of America, Vol. 73(3), pp. 785–99, 1983
7. Auregan, Y., M. Pachebat, Measurement of the nonlinear behaviour of acoustical rigid porous materials, Physics of Fluids, Vol. 11, pp. 1342–1345, 1999
8. Cox, T. J., D’Antonio, P., Acoustic Absorbers and Difusers, Taylor & Francis, USA, 2009
9. Gorman, G., Free Vibration Analysis of Rectangular Plates, Elsevier, NH, USA, 1982
10. BS EN ISO 354:2003, Acoustics – measurement of sound absorption in a reverberation room
11. ISO 10534-2:1998, Acoustics – determination of sound absorption coefficient and impedance in impedance tubes. Part 1: Method using standing wave ratio
12. ISO 10534-2:1998, Acoustics – determination of sound absorption coefficient and impedance in impedance tubes. Part 2: Transfer-function method
13. Nocke, C., V. Mellert, Brief review on in situ measurement techniques of impedance or absorption, Proceedings Forum Acusticum, Sevilla, 2002
14. Ohayon, R., C. Soize, Structural Acoustics and Vibration, Academic Press Limited, London, 1998
15. Soedel, M., Vibrations of Shells and Plates, Marcel Decker Inc., IN, USA, 1982.
16. Tayong, R., Dupont, T., Leclaire, P., Experimental investigation of holes interaction effect on the sound absorption coefficient of micro-perforated panels under high and medium sound levels, Applied Acoustics, Elsevier, Vol. 72, pp. 777-784, 2011

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