Answer to Question #301594 in Electrical Engineering for enen

Question

 How does narrowing the bandwidth of a circuit affect the noise level? 

Answer 1

To begin with, noise power is stated as proportional to bandwidth. Therefore if the bandwidth is narrowed it means that the nose level will decrease. On the contrary if bandwidth is more there will be more noise power. N=KTB. Above all it should be noted narrow bandwidth has noise distributed over a narrow audible range .