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Author Topic: Tech Topic: Coherence & Reverberation  (Read 193 times)

M. Erik Matlock

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Tech Topic: Coherence & Reverberation
« on: January 11, 2019, 03:34:28 pm »

Tech Topic: Coherence & Reverberation
Real-world observations on separating the signal from the noise.
By Merlijn van Veen ē January 11, 2019

Coherence is a common feature found on many analyzers that enables us to distinguish signal from noise. It will indicate whether youíre measuring a loudspeaker or, for example, a moving light.

Coherence is subject to change. One of the aspects involved, among others, that weíll explore in-depth is the relationship between the direct sound of a loudspeaker in a room and the roomís reverberation. This is an attempt at putting real-world observations into context. Many of the results have been obtained experimentally, and some concepts that donít directly further our understanding have been deliberately omitted.

Loosely defined, coherence is a function that indicates contamination of the measurement data. Itís proportional to the ratio of signal to the sum of signal plus noise...

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