Modeling of three-dimensional sound directivity patterns of helicopters

被引：0
|
作者：
Krebs, W [1 ]
Bütikofer, R [1 ]
Plüss, S [1 ]
Thomann, G [1 ]
机构：
[1] EMPA Duebendorf, Abt Akust Laermbekaempfung, CH-8600 Dubendorf, Switzerland
来源：
ACTA ACUSTICA UNITED WITH ACUSTICA | 2003年 / 89卷 / 02期
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Measurements on helicopters in flight have been performed in order to improve the noise characteristics used in computer simulations of helicopter noise. A new method of deriving a three-dimensional directivity pattern of the noise source from the measurements is presented. The method is based on a fit of the measured data to spherical harmonics. Using these models the sound emission for different flight procedures is investigated and compared to measured data.
引用
收藏
页码：273 / 279
页数：7
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