Q4. A public Address system (PA system) is an electronic sound amplification system which ha a microphone, amplifier and loudspeakers. In the amplifier, the sound signal will be injected inte an adjustable filter bank so that the amplifier can only respond to either low frequency (bass), medium frequency (voice) or high frequency (treble) as shown in Figure Q3. H(w) Table Q3 Sound Type Frequency Range 20HZ – 250HZ 300HZ -- 4kHz 6kHz – 20kHz Bass Bass Voice Voice Treble Treble Figure Q3 If the input signal x(t) = cos400nt + cos2000nt + cos12000nt, find the Fourie Transform of x(t) and sketch its amplitude spectrum

Q4. A public Address system (PA system) is an electronic sound amplification system which ha a microphone, amplifier and loudspeakers. In the amplifier, the sound signal will be injected inte an adjustable filter bank so that the amplifier can only respond to either low frequency (bass), medium frequency (voice) or high frequency (treble) as shown in Figure Q3. H(w) Table Q3 Sound Type Frequency Range 20HZ – 250HZ 300HZ -- 4kHz 6kHz – 20kHz Bass Bass Voice Voice Treble Treble Figure Q3 If the input signal x(t) = cos400nt + cos2000nt + cos12000nt, find the Fourie Transform of x(t) and sketch its amplitude spectrum

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter11: Thermostats, Pressure Switches, And Other Electric Control Devices

Section: Chapter Questions

Problem 23RQ

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