The Frequency domain A(periodic) signal can be viewed as a sum of sine waves of different strengths. >)Corresponds to energy at a certain frequency Every signal has an equivalent representation in the frequency domain > What frequencies are present and what is their strength(energy) Again: Similar to radio and Tv signals lme requency 88 The Frequency Domain A (periodic) signal can be viewed as a sum of sine waves of different strengths. » Corresponds to energy at a certain frequency Every signal has an equivalent representation in the frequency domain. » What frequencies are present and what is their strength (energy) Again: Similar to radio and TV signals. Time Frequency Amplitude