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Old 26th May 2012, 06:30 PM   #1
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Default can you hear the ringing?

suppose you had a ringing artifact in the scope. if you were to compare it to another amp of exact same build but without the problem, would you be able to identify the flaw by ear? and what would it sound like?
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Old 26th May 2012, 07:17 PM   #2
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Reading the first part of the sentence, the construct suggests you have a defective oscope. The second part, audibility, would depend on the artifact, the programme material and the listener. (In my opinion) E

ps: This is the sort of answer why Laocoon was killed!
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Old 26th May 2012, 07:21 PM   #3
DF96 is offline DF96  England
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Depends on the ringing frequency, damping and (possibly) cause. You are asking how long a piece of string do I need?
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Old 26th May 2012, 07:25 PM   #4
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haha I see. sorry, it was a blunt question, and only theoretical because I don't have a scope.

perhaps adding this phrase in the beginning might help? -'in your experience have you had a case where... (ect)'
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Old 26th May 2012, 07:40 PM   #5
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Even if the ringing is at a "higher than audible" frequency you can hear its effects -- 1) it can cause enough energy to be transmitted through the system to cause a high speed comparator to jitter, and 2) the energy may be enough to cause PN junctions in analog circuits to turn on prematurely. The latter is discussed in a paper on Analog Devices website. The former I learned about last week from a fellow in the digital end of the music industry.

Here's an example of a well regarded OEM regulator "ringing" -- the impulse test provides enough excitation to put the circuit into oscillation -- i've observed it at 1Mhz, 3MHz and 8.5MHz depending on the output filter.

Click the image to open in full size.
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Old 26th May 2012, 08:06 PM   #6
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There is no dobt that sub-harmonics will alter the signal, but here is the Q from the OP:
"would you be able to identify the flaw by ear? and what would it sound like?"
There is no ready answer to that. E
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