Step 1 Buy adobe audition Step 2 Mix white noise together with a beeping sound Step 3 Run the built- in noise removal program Step 4. Appear multiple times on CNN to explain how, if the flight 370 beacon were still operating, they could pull it out if the noise. Or, if they ever find the black box, they could enhance the cockpit alerts. I want this job. Bob
OT. How to become a forensic audio expert
Started by ●April 20, 2014
Reply by ●April 20, 20142014-04-20
More discussion re MH370 here http://www.duncansteel.com/ And here http://tmfassociates.com/blog/2014/03/24/understanding-the-satellite-ping-conclusion/#comments And here http://www.airliners.net/aviation-forums/general_aviation/read.main/6057888/ It actually very much on topic Mark
Reply by ●April 20, 20142014-04-20
On 4/20/14 8:16 PM, makolber@yahoo.com wrote:> More discussion re MH370 here > > http://www.duncansteel.com/ > > And here > > http://tmfassociates.com/blog/2014/03/24/understanding-the-satellite-ping-conclusion/#comments > > And here > http://www.airliners.net/aviation-forums/general_aviation/read.main/6057888/ > > It actually very much on topic >isn't that what "OT" means? that it's On Topic? -- r b-j rbj@audioimagination.com "Imagination is more important than knowledge."
Reply by ●April 20, 20142014-04-20
On Sun, 20 Apr 2014 16:15:56 -0700 (PDT), radams2000@gmail.com wrote:>Step 1 > >Buy adobe audition > >Step 2 > >Mix white noise together with a beeping sound > >Step 3 > >Run the built- in noise removal program > >Step 4. > >Appear multiple times on CNN to explain how, if the flight 370 beacon were still operating, they could pull it out if the noise. Or, if they ever find the black box, they could enhance the cockpit alerts. > > >I want this job. > >BobDecades ago when Fuzzy Logic was a Big Deal there was an "expert" on the radio explaining how a normal digital control system running an elevator would only have two states, where the elevator was moving or stopped. So when approaching a floor it would suddenly slam to a stop when it reached the proper location. The far superior fuzzy logic system got around this by allowing the elevator to slow down gradually before it reached the proper location. I've seen that sort of thing repeated dozens of times over the decades. When the news/media outlets don't have a science/technology editor (and most don't due to budgets), I think their search criteria for an "expert" boils down to somebody willing to come on some sort of marginal credential and within budget. Eric Jacobsen Anchor Hill Communications http://www.anchorhill.com
Reply by ●April 21, 20142014-04-21
On CNN a few nights ago, some people were discussing the missing plane, when someone mentioned the equipment aboard one of the Australian Navy ships (something to the effect of "... don't they have magnetometers for hunting submarines?"). I think it took a while before one of the other panelists came up with the comment that "submarines are made of steel, and airplanes are made of aluminum and carbon composite." I don't think there was much discussion on the magnetic (or non-magnetic) properties of materials, nor the weak propagation of electromagnetic energy in the ocean. On a different panel discussion some time previously, someone else had also mentioned the deep sound channel, which lead me to wondering what the heck it had to do with finding a pinger, given that the deep sound channel has a low frequency cut-off. But occasionally, CNN will have someone on who has a background in oceanography or ocean acoustics. eg: people who actually read and know things like the following: http://www.scor-int.org/IQOE/Cato_Paper.pdf (interesting - the author writes about ambient noise off Perth, Australia).
Reply by ●April 21, 20142014-04-21
Eric Jacobsen <eric.jacobsen@ieee.org> wrote: (snip)> Decades ago when Fuzzy Logic was a Big Deal there was an "expert" on > the radio explaining how a normal digital control system running an > elevator would only have two states, where the elevator was moving or > stopped. So when approaching a floor it would suddenly slam to a > stop when it reached the proper location. The far superior fuzzy > logic system got around this by allowing the elevator to slow down > gradually before it reached the proper location.Interesting way to explain it. If you consider it an analogy, it might not be so bad. Like many analogies, you shouldn't take them too literally, but that is likely what happens if you use that explanation with non-scientists. But elevator logic really does need work. I know way too many elevator systems with more than one elevator, and when you press the button all of them come. That is not, as Spock would say, logical. Now, how about a good explanation of neural-nets for non-scientists. -- glen
Reply by ●April 21, 20142014-04-21
kevinjmcee <kevinjmcgee@netscape.net> wrote:> On CNN a few nights ago, some people were discussing the missing > plane, when someone mentioned the equipment aboard one of the > Australian Navy ships (something to the effect of "... don't they > have magnetometers for hunting submarines?"). > I think it took a while before one of the other panelists came > up with the comment that "submarines are made of steel, and > airplanes are made of aluminum and carbon composite."When the last plane sank in the ocean, and there was discussion on how long the pings last, I was wondering why no exponential back-off on the ping rate. That would make it harder and harder, but not impossible, to find at later times. To get an actual DSP question, I was wondering what was the best way to process the signal from a bunch of microphones in the ocean listening for pings. Seems to me that if you combine the signals from many microphones with variable delay, it should be possible to do better than with each one individually. But I don't know the numbers for the actual pings or microphones. -- glen
Reply by ●April 22, 20142014-04-22
On Sun, 20 Apr 2014 20:55:11 -0400, robert bristow-johnson <rbj@audioimagination.com> wrote:>On 4/20/14 8:16 PM, makolber@yahoo.com wrote: >> More discussion re MH370 here >> >> http://www.duncansteel.com/ >> >> And here >> >> http://tmfassociates.com/blog/2014/03/24/understanding-the-satellite-ping-conclusion/#comments >> >> And here >> http://www.airliners.net/aviation-forums/general_aviation/read.main/6057888/ >> >> It actually very much on topic >> > >isn't that what "OT" means? that it's On Topic?If so, it's defensive. -- John
Reply by ●April 22, 20142014-04-22
