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Projekt

Diffraction of sound by noise barriers

Forskningsområde:

Teoretisk och beräkningsmekanik

Projektmedlemmar:

Enflo, B.O.

Pavlov, I.

Sandqvist, H.

Finansiär:

BFR, KFB

Projektbeskrivning

Noise from traffic, fans, motors etc. is often shielded by barriers. In normal design the top edge of a noise barrier is straight. The edge may act as a string of highly correlated point sources. The effectiveness of the barrier is reduced by the coherence of these secondary sources. Experiments at The University of Texas show that the effectiveness of the barrier can be increased if it is made irregular. The project aims at understanding of these phenomena by theoretical methods. It will continue with theoretical and experimental investigations of possibilities of increasing the effect of sound barriers.

Publikationer relaterade till projektet

År	Titel
1998	Diffraction of sound against barrers with simple edge profiles. NAM 98, Proc. of the Nordic Acoustic Meeting, Stockholm 7-9 Sept. 1998 97-99 (Publicerad)
1998	Diffraction of sound against barriers with simiple edge profiles Proc. of the 21th Scandinavian Symposium on Physical Acoustics, 1-4 Feb., 1998 (Publicerad)

Interna rapporter relaterade till projektet

År	Titel	Dokumenttyp
1999	Diffraction of sound from a point source against screens with periodical edge profiles	Licentiatavhandling