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A simple system that will allow you to calculate with decibels on the back of an envelope without having to use an actual calculator.
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Coherence is a common feature found on many analyzers enabling us to distinguish signal from measurement contamination. It will indicate whether you're measuring a loudspeaker or, e.g., the noise produced by a moving light.
Coherence is subject to change. One of the aspects involved (among others) that we’ll explore in-depth, is the relationship between the direct sound of a loudspeaker in a room and the room’s reverberation.
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For good cancellation behind inline cardioid subwoofer arrays like end-fire and gradient, it's mission critical that the subwoofers have matched levels. But how does the physical displacement between the subwoofers affect the array's performance over distance?
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Prof. John VanderkooyIn 2010 Prof. John Vanderkooy presented an AES paper offering analytical proof and compelling evidence that the acoustic center for low frequencies resides in front of the loudspeaker at a distance of approximately two-thirds of the baffle radius.
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"If a battle can't be won, don't fight it"
- Sun Tzu -
Whenever we experience too much of a particular frequency or frequency range, we're tempted to resort to equalization to resolve the situation. In this article I will demonstrate that the effectiveness of EQ relies entirely on the relative level separation from other sources.