That's the interference of sound waves from the forks.

那是音叉发出的声波的干涉的结果。

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A theory analysis is made for a phenomenon of "line group" which is bell shaped, and the spectrum interference between direct path sound and reflected sound is revealed.

从理论上分析了钟型的“线谱群”的产生原因，证明了此现象是反射声和直达声之间的谱干涉引起的。

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Beside filtering interference signals and extract effective signals, it is a difficult problem to study the separation of multi-signal of sound wave and vibration.

在实际测量过程中，除了过滤干扰信号，提取有效信号外，多振动源信号分离是本文研究的一个难点。

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Sound money, low taxes, the rule of law, minimal government interference and open trade are core principles of economic progress.

FORBES: Fact and Comment

Brazil will hold critical elections in 2002 that will help determine whether sound economic reforms continue or whether the country lurches into another round of government interference and manipulation.

FORBES: Fact And Comment