Communication Systems - Engineering

Q1:

Dolby system of noise reduction divides the total audio spectrum into

A 8 frequency bands

B 4 frequency bands

C 2 frequency bands

D none of the above

ANS:B - 4 frequency bands

Dolby A system divides the frequency in 4 bands viz.f < 80 Hz, 80 Hz < f < 2999 Hz, f > 3000 Hz, f > 9000 Hz.