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Originally Posted by DanDan  third octaves were developed for a quite a few reasons. They do correlate with audible phenomena much better than single tones. |
Yes, mostly, but not always. Maybe you've seen this short article:
Audibility of Narrow-Band EQ Quote:
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I, and probably you, use both, smoothing for the big picture and no smoothing with zooming to get at areas of particular interest.
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Exactly. I generally use third-octave smoothing above 500 Hz or so, but mostly because it's very difficult to see through the severe comb filtering that is always present but not necessarily audibly damaging. I recently calibrated the active crossover on the big speakers in my studio and I used third-octaves in REW to better see the big picture of lows level versus highs level. So on that I certainly agree with you. However, if I were measuring a loudspeaker in an anechoic chamber I would not use smoothing unless I were the manufacturer and wanted to hide the true response from potential customers.
--Ethan