Question

Consider a sound system that doubles the volume of the sound and
delay the signal by time decided by user. Represent the relation
herween input and output signal mathematically. Check whether the
above system satisfies the properties of the system and justify the
same with necessary equations.​

Answer 1

Answer:

Basically -3dB is 0.707 units and it is very commonly used with filters of all types (low pass, band pass, high pass...). The low & high cut-off frequency is at which the power is reduced to one-half of the maximum power and the range between the two is the bandwidth of the signal. It is just saying the filter cuts off half of the power at that frequency. If operated below these frequencies the system might not give desired results