Specifications

Using Delay in Common Applications

Using Delay To Correct Phase Cancellation Problems

Problem:

Phase cancellation can occur when two loudspeakers are near each other but not

aligned. The two speakers can be seen in the illustration below. The waves represent the sound

coming from each. The sound waves coming from the main and remote loudspeakers are out of

phase. Because they are out of phase, the sounds interfere with each other, degrading audio quality.

The illustration below shows how sound waves cross, causing phase cancellations.

LOUDSPEAKER

MIXER

AMPLIFIER

Solution:

The DFR11EQ Delay can be used to delay the signal to loudspeaker B just long

enough so that it is aligned and in phase with the sound from the loudspeaker A. When in phase, the

waves reinforce each other to maintain audio quality. The following illustration shows how the

DFR11EQ delay works in a sound system.

DFR11EQ

WITH DELAY

MIXER

AMPLIFIER

LOUDSPEAKER

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