Chapter | twenty-two

 

Summation of Audio Signals

 

CHAPTER OUTLINE

Electrical Summation, Correlated Signals

Electrical Summation, Uncorrelated Signals

Summation for Mono

90°Summation

Time Delay in a 90°Phase-Shifting Path

Comb Filtering

Dip Frequencies

Acoustic Summation of Signals

 

The summation of audio signals can be acoustic or electrical. Acoustically, it can be two sound sources in a roomrecorded at one position. Electrically, it can be two microphones that are connected to different inputs on a mixer. These signals are subsequently combined electrically and then routed to the same output.

The total level of the combined signal depends on the nature of the two signals. Some characteristic examples follow.

ELECTRICAL SUMMATION, CORRELATED ...

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