超声检测中的结构噪声

The structure noise in the ultrasonic testing

结构噪声是超声脉冲在介质结构上激发产生的一种特殊噪声，它严重妨碍超声检测，是超声检测的基本限制因素之一；但也可被利用进行某些检测。本文综述了有关结构噪声的基本研究，抑制或降低结构噪声的方法，以及在结构噪声背景下进行超声检测和利用结构噪声进行超声检测的有关工作。

The structure noise is a special kind of noise produced by the scattering of the sonifying ultrasonic pulse by the microstructure of the medium. It of ten acts as a seriouse obstacle interferring the ultrasonic testing, it may also offer useful information of the media. The historical development of basic concepts, acoustical means of signal-to-noise enhancement, signal detection on the background of the structure noise and applications of such noise are reviewed in this article.