Cylindrical Nearfield Acoustical Holography: Practical Aspects and Possible Improvements

被引：1
|
作者：
Kirchner, Matteo [1 ,2 ]
Nijman, Eugenius [1 ]
机构：
[1] Virtual Vehicle Res Ctr, Area NVH & Frict, Inffeldgasse 21-A, A-8010 Graz, Austria
[2] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300, B-3001 Heverlee, Belgium
来源：
AUTOMOTIVE NVH TECHNOLOGY | 2016年
关键词：
NVH; Cylindrical NAH; Holography; Acoustics; Airborne noise; Compressive sampling; REGULARIZATION; PRINCIPLES;
D O I：
10.1007/978-3-319-24055-8_4
中图分类号：
U [交通运输];
学科分类号：
08 ; 0823 ;
摘要：
This chapter discusses Nearfield Acoustical Holography (NAH) for the characterization of cylindrical sources. Cylindrical NAH is an experimental airborne characterization technique, and it is suited for any type of cylindrical source. NAH allows to evaluate sound intensity, pressure level and particle velocity. Practical aspects of Nearfield Acoustical Holography such as positioning error, measurement noise, hologram distance and measurement aperture are investigated and discussed with the aid of numerical examples. Moreover, a technique referred to as compressive sampling (CS) is discussed, aiming to reduce the number of sensors required by the classical NAH in the high frequency range.
引用
收藏
页码：47 / 62
页数：16
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