From the course: Audio Foundations: Reverb

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Understanding the frequency dependence of reverberation

Understanding the frequency dependence of reverberation

From the course: Audio Foundations: Reverb

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Understanding the frequency dependence of reverberation

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So far, our discussions of Reverb Time have been with full bandwidth signals, which is to say we found the time it took for the entire signal to decay by 60 decibels. Reverb time, however, is rarely the same at mid, low, and high frequencies. So for instance, the reverb Time at 100 Hz might be longer than the Reverb Time at a 1000 Hz. The Reverb Time up high at 10,000 Hz might be shorter. This is the frequency dependence of reverb. We take the concept of reverb and divide it up along the frequency axis to observe reverb times from low to high. Most physical spaces have decay time that is highly dependent on frequency. In fact, I've never heard a room that decayed evenly across the entire audible band, so knowing the decay time as a function of frequency is a great goal. Or is it? Wait a second, we humans can hear across 10 octaves, so this approach would have us trying to keep track of and dial in 10 different time values in order to specify one frequency dependent reverb program for…

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