Discussion
The rate at which a single-pole response falls beyond its break is ______ decibels per octave.
Answer: C
A single pole falls at six decibels per octave, equivalently twenty per decade. Three decibels is the drop at the break itself rather than a rate, and twelve per octave describes two poles. Twenty is right only when the unit is a decade rather than an octave. Two ways of stating one slope, plus one number that is a point rather than a slope, is the confusion this topic turns on most often.
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