The Korean scientists, however, want to harness a different kind of power source: sound waves.

然而，韩国科学家想驾驭一种不同类型的能量源，那就是声波。

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To verify the accuracy and reliability of the system, contrast tests on reference sound power source and small motor are performed respectively in a semianechoic chamber and a common room.

为了验证噪声检测系统的精度和可靠性，在半消声室和普通房间内，分别对标准声功率源和小型电机作声功率对比测量试验。

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Sound waves travel outward like balloons expanding around their source. The sound's power is distributed on the surface of the wave which increases with the square of the distance from its source.

声波的扩散就好比气球的膨胀，声波从声源向四周扩散，声音的能量也随着声波四散开来。

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