The 4 k B T R {\displaystyle 4k_{\text{B}}TR} voltage noise described above is a special case for a purely resistive component for low frequencies.
4 k B T R {\displaystyle 4k_{\text{B}}TR} 噪声电压上所述是一个特殊的情况下对一个纯粹的阻性成分用于低频率。