This thread has been recently resurrected if you want to plough through it
constrained layer damping with MDF and Ply It's complicated and measuring it isn't easy, Earl Geddes queries whether vibration actually produces much radiated sound anyway.
We can measure the difference between 192/24 vs 44.1, but can we hear it ?
We can measure the difference between 1ppm and 10ppm distortion, but can we hear it ?
The answer to both question is most probably no.
So since we can measure things with ease that we can't hear, it's not completely illogical to think that the other way round we can hear things that we cannot (yet) measure.
Because not having an exact model of our very complex hearing system, it's hard to tell from the current sort of measurements what impact the outcome will have on our hearing system IMHO.
Hans
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The answer might be yes to both.
Regarding sample rates, it may have nothing to do with hearing high frequencies, it may have to do with hearing other secondary effects in dacs (maybe filters, maybe aliasing, etc.).
Regarding low level distortion, if we measure nonlinearity in terms of HD as seen on an FFT, maybe we could hear some IMD produced with complex music due to the same underlying nonlinearity. Would that amount to hearing -120dB HD distortion, as given in some equipment spec? Depends what one means when asking the question: Can we hear any evidence of the associated nonlinearity in the form of IMD, or can we hear harmonics above 20kHz, or what (especially germane when no IMD of any sort is spec'ed).
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So touchy. Their brilliance was not the point. So, do your own EDN version here and offer a tip or trick of your own for DIYAudio guys.
I noticed at log in there were 99 people reading this. but same few doing the talking. Apparently, lots of people are interested in simple, practical and effective tips and circuit tricks that They could apply.
THx-RNMarsh
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No one had rated this thread, so I just gave it one star, which apparently means it's terrible.
I thought of the blanket test as I was curious how audible my enclosure was to vibration of the cabinet. It was not the m2 and was not as well braced. But it was a more compact 3-way size. I decided it was a non-issue as I didnt hear any difference in that system and speaker.
But, I put it out here for others to learn about their systems and decide for themselves.
THx-RNMarsh
We have had a few interns work Here that went on to earn their EE at UC Davis, Cal poly, etc. Very smart, capable people with lots of talent. Fortunately they went on to design IC’s, medical equipment and the like. It’s a good thing audio is around so I can make a living.
Correlation is not causality. The practical and effective tips and tricks are being discussed all over here on a daily basis on other threads. I'm not sure why you think people should collate them all together in one place just for you.
What makes you think it is just for me? More assumptions. Yes, i am bored with the small talk and text book info.
I enjoy cleaver circuit ideas as much as the other guy. I like the Art of Electronics - The X-Chapters. All New circuit tricks and techniques.
Do you have any?
THx-RNMarsh
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A tip would be to buy good semis When they are available. Better investment than the market. Also have been enjoying the new AP 500 series. It helped me dig deeper on the measured performance of a phono stage. I redid the layout paying closer attention to the current flow, changed copper to four ounce and lowered the noise floor 6+ dB. No new physics or anything like that.😉
Just brings me back 40 years to being told in school measure, measure, measure!
Do the measurements match the math.
The AP made it easier to test, especially with 100 dB gain at the low end.
Just brings me back 40 years to being told in school measure, measure, measure!
Do the measurements match the math.
The AP made it easier to test, especially with 100 dB gain at the low end.
You'll need the food thread for cleaver ideas 😛
Excellent, I am sure you have not read all 500 pages yet so why not do that?
I wouldn't post them here to get lost in the noise.
I have always wondered how much beer/wine/whatever I would have to buy you and Nelson before one of you admitted quite how many you stocked up on at the time 🙂
Hahahaa... so you are the guy pooping around this forum sharing all the 1 star ratings, I've been slightly wondering what's up with all the "1 star by 1 person" ratings trend since a few years, you just revealed your covert operation!
Because he keeps editing his posts some time later?
According to another audio businessman, there are lots of sound we can hear but cannot be measured. When I asked to cite examples, he couldn't name one and still can't even after 4 years.
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