Calculation of Noise Barrier Performance in a Turbulent Atmosphere by Using Substitute Sources above the Barrier
The paper presents a model that can be used for calculating the sound reduction by a noise barrier in a turbulent atmosphere. The field due to the acoustic source is substituted by a distribution of sources above the barrier (here called substitute sources). The mean power at the receiver
is calculated as line-of-sight propagation through a turbulent atmosphere from all substitute sources using a mutual coherence function. In this study the strengths of the substitute sources are calculated using the Kirchhoff approximation. The calculated results show good averall agreement
with those from using a parabolic equation method (PE).
Document Type: Research Article
Publication date: 01 March 2000
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content