A Line Source Above a Plane Absorber
Many papers deal with the absorption of a spherical wave by an absorbing plane. The absorption of a cylindrical wave has found less attention, although a line source may be a good model for some practical source configurations. The analysis of the sound field of a line source above
a plane absorber is presented and the computation by saddle point integration is derived. The absorber may be either locally reacting or bulk reacting. The sound field of the line source has a constant azimuthal distribution; its pattern along the axis may be constant, or correspond to an
axial wave, or to a superposition of axial waves. Numerical examples are shown for the special case of a locally reacting absorber. They show, that the often used geometrical acoustic approximation may produce large errors near the surface, but works quite well in some distance of it.
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