Physically, the resistor is effectively the source of noise. 从物理上来说，电阻器等效于噪声源。
Using the microphone array system based on beam forming technology,the noise emission property of a motorcycle was investigated in detail. 利用基于波束成形的远场声阵列噪声源分析技术研究了摩托车辐射噪声的声源特性。
