Transformand Filtering Principles - Synthesis Lectures on Signal Processing - page 156

Sound Source

Path 1

Register or RAM

ADC

Mic 1

Path 2

ADC Register or RAM

Mic 2

Figure 4.27: Two microphones receiving a sound in a room. The second microphone, further away from
the sound source than the first microphone, receives the sounds later. The sounds are digitized and stored
in the respective registers.

( 0 . 0044 sec )( 1080 ft/ sec ) = 4 . 725 ft

4.12 THE SINGLE-POLE IIR

4.12.1 PHYSICAL ARRANGEMENT
Consider the arrangement shown in the left-hand portion of Fig. 4.30. An input signal (shown in plot (a))
enters a summing junction; the sum exits and becomes the output, but the output value also enters a delay,
which has an input side and an output side. The value at the input side moves to the output side at every
sample or clock time. The large triangle with a number in its interior is a gain block or multiplier, and
the number in its interior is multiplied by the delayed output signal, and the product is passed to the
summing junction. The value of the gain is called the pole , and is in general, a complex number.