In Reply to: RE: Is there a reference for the 6db thing? I can't find it posted by rkeman on March 29, 2014 at 18:35:37:
You apparently still did not re-read my post.
Aside from that, regarding transients, a toneburst is one type of transient signal, but a very specialized one, and it is not necessarily what I was referring to.
In the world of measurement signals (which doesn't always correlate directly or strongly to the world of listening to music), a single sample pulse (or dirac function), commonly used for FFT analysis, would be a type of transient more representative of musical transients, esp. cymbal crashes, electric guitar fuzztone spikes, etc.
You don't mention if the toneburst you used was shaped or gated, this will have a significant impact on just how "transient" it is in terms of a test signal, even so, the primary toneburst frequency would still tend to mask or overshadow the true transient portion of the toneburst, if it were not a shaped type.
In terms of showing energy storage, yes, a tone burst can do that for the loudspeaker, primarily AT THE GIVEN FREQUENCY of the toneburst. Away from that frequency, the measurement equipment will be unable to discern the transient behavior of the DUT, unless it is truly terrible and of a large amount of deviation from linearity.
Finally, there is a significant difference between an energy storage resonance (which is what toneburst's measure with a loudspeaker transducer), and other effects that tend to blunt or soften a transient, which is more of a filtering effect. Signals that work well with the former, will not be very effective with detecting the latter.
Previous posts referred to the likely effects more specifically, they did not refer to energy storage issues.
So the bottom line is, your jumping in here with comments about measuring tonebursts is a complete red herring, and really bears no relationship to what was being discussed.
With that in mind, I strongly suggest you give it a rest, and beat a strategic retreat.
Jon Risch
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Follow Ups
- RE: Is there a reference for the 6db thing? I can't find it - Jon Risch 21:31:03 03/30/14 (0)