The Convolution Integral

Recall  that the convolution integral process is broken down into four steps:

• folding the impulse response function: h(tau) folds to h(-tau)
• shifting the impulse response function: h(-tau) shifts to h(t-tau)
• multiplying the folded/shifted impulse response function with the excitation: h(t-tau) f(tau)
• integrating to find the area under the h(t-tau) f(tau) curve