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

页码：273 / 279

页数：7

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