Yes - I optimised on suppressing any mirroring by trading BW. But still very steep - 183 dB just before Fs/2 (22,049...)
Your memory servers you well
//
My brother was telling me about a bacteria (?) attacking oak trees in New England where he lives. They drill a small hole in the tree at eye level, insert the medicine and then seal it over with some wax. Within 30 minutes, the stuff they put in the trunk can be detected in the leaves at the top of the tree. I found that quite extraordinary because I would not have thought stuff moved that quickly around a tree, but it does.
MSDSs (mainly, Section 11):
MEK
http://www.holmberg.se/upload/product/files/sds-methyl-ethyl-ketone-mek-eng-2014-08-19---733.pdf
xylene
http://www.holmberg.se/upload/product/files/sds-xylene-eng-2013-11-11---474.pdf
polyurethane varnish
https://images.homedepot-static.com/catalog/pdfImages/94/94ed8323-1870-47f9-9bc3-517b7ac41583.pdf
acetone
http://sds.chemtel.net/webclients/safariland/finished_goods/Pioneer Forensics - PF003 - Acetone.pdf
George
I haven't read the data sheets but I have real world experience with MEK.
It's as bad as other solvents typically used in the field in commercial applications. It's a good idea to wear a mask and gloves even in open spaces. That wasn't the case 30 years ago when we splashed it around like no one's business. Xylene, Toluene and mineral spirits are others we used.
OT: The automotive parts degreaser used in 'gunk tanks' was the worst. It would remove unprotected skin like badly sunburned skin falling off a few days after exposure.
It's as bad as other solvents typically used in the field in commercial applications. It's a good idea to wear a mask and gloves even in open spaces. That wasn't the case 30 years ago when we splashed it around like no one's business. Xylene, Toluene and mineral spirits are others we used.
OT: The automotive parts degreaser used in 'gunk tanks' was the worst. It would remove unprotected skin like badly sunburned skin falling off a few days after exposure.
The myth that you need a frequency response to the reciprocal of the time to resolve it
It is amazing how these chemicals were at first tolerated and now virtually banned.
I am trying to pin down what gave my wife (at the time) a deformed fetus that she lost at 5 mo. I saw it, and it was not 'right'. She had recently worked at Fairchild in the chemistry lab, and got exposed to a lot of nasty stuff. I finally got her to quit after she spilled acid on her foot, one day, but too late for the baby. Is there something WORSE than MEK that was used back in the 60's in IC labs, especially for pregnant women?
I am trying to pin down what gave my wife (at the time) a deformed fetus that she lost at 5 mo. I saw it, and it was not 'right'. She had recently worked at Fairchild in the chemistry lab, and got exposed to a lot of nasty stuff. I finally got her to quit after she spilled acid on her foot, one day, but too late for the baby. Is there something WORSE than MEK that was used back in the 60's in IC labs, especially for pregnant women?
MEK is not good stuff to be working without a lot of very good engineering controls. One of a few solvents historically good for huffing and killing brain cells. Toluene and Xylene aren't good either, but more recent info about acetone makes long term exposure less scary than the latter three (but still good to have a solvent mask and gloves if you need to use it).
John -- really sorry to hear about the miscarriage. An acid spill is unlikely versus any number of organic compounds that do have a litany of reproductive dangers. As litigious as CA is and (probably) over-vigilance to some classes of chemicals, there's a lot of research and documentation into toxicology that makes our lives a lot safer since the 60's. In a similar vein, quite a few of the photoresists/resins we used in a semiconductor fab are really really bad for reproductive health. When I spent a lot more time in the fab, the older techs, who'd already had kids, were super nice about swapping jobs with me (then in my early 20's) so they'd do more lithography work and I more of the fiddly hand eye coordination stuff.
John -- really sorry to hear about the miscarriage. An acid spill is unlikely versus any number of organic compounds that do have a litany of reproductive dangers. As litigious as CA is and (probably) over-vigilance to some classes of chemicals, there's a lot of research and documentation into toxicology that makes our lives a lot safer since the 60's. In a similar vein, quite a few of the photoresists/resins we used in a semiconductor fab are really really bad for reproductive health. When I spent a lot more time in the fab, the older techs, who'd already had kids, were super nice about swapping jobs with me (then in my early 20's) so they'd do more lithography work and I more of the fiddly hand eye coordination stuff.
Not exactly connected. BTW "time smear" is an ill defined term that is mainly used in marketing BS because it sounds "bad".
Well kinda.....some in the recording industry consider up to 48k sampling ‘lossy’
Most all digital recording is done at 192.
This is just what I’m coming across when I research this.....don’t know if it’s gospel or not.
But the point is if it’s still considered lossy at 48k wouldn’t some of the same issues still exist (even if to a lesser extent), and as systems keep getting better resolution people could possibly begin to hear it?....it being the difference.
Most all digital recording is done at 192.
This is just what I’m coming across when I research this.....don’t know if it’s gospel or not.
But the point is if it’s still considered lossy at 48k wouldn’t some of the same issues still exist (even if to a lesser extent), and as systems keep getting better resolution people could possibly begin to hear it?....it being the difference.
Last edited:
Where did you picked up this rubbish? Let me guess - Google university.
People using/developing time-frequency analysis methods are using "temporal smear" or "frequency smear" or even "spectral smearing" quite ..er...frequently. I'd guess it is not just for marketing BS reasons......
Last edited:
Here’s one article I came across that sparked the connection (albeit 16/44.1 to mp3 etc)
What Data Compression Does To Your Music
Quite a few others state once you downsample from the original rate (say 192) the lossy compression begins.
Last edited:
People using/developing time-frequency analysis methods are using "temporal smear" or "frequency smear" or even "spectral smearing" quite ..er...frequently. I'd guess it is not just for marketing BS reasons......
What ever you say. People like Fourier and Shannon or those with something new to sell?
Last edited: