Paphitis wrote:Pyrpolizer wrote:Paphitis wrote:Kikapu wrote:Paphitis wrote:
I also like seeing the ADF doing a good job. The world is really noticing their professionalism and they have done a great job.
Whether they find it or not, I don't believe anyone can find any flaws with the way the Aussies have handled this difficult task.
Even spotting garbage from space is pretty damn impressive. This country never ceases to amaze me. Always they are capable of miracles so don't be too surprised if they find MH370.
No one for a minute said anything negative against the men and women in Australian uniform in performing their jobs. They followed orders and gave it their all. It's the people at the top in the government is where my suspicions are.
And here I will make a prediction, that the Aussies will find the MH370 in pieces right about where they think it is right now in the next few months, but ONLY if indeed it was shot down by the Americans near Diego Garcia. For all we know, the last 4 weeks has been designed to lay the seeds in the minds of everyone that the present search area to be the crash site, and soon, when it is announced that the search mission is over at full scale and it will be scaled back to bare minimum, all of the MH370 collected from another crash site will be brought and dumped to this "crash site", including the Black Boxes, but with a new data written over the old one, indicating the new crash site as the ONLY crash site. This still won't explain what happened in the air an hour after the MH370 took off from KL and then diverted to heading South West.
I also believe the Australian Government has been very sincere at all levels and always willing to throw a massive amount of money and resources to the effort. They have worked very well with some 26 other countries that have contributed in some way.
Now, if MH370 was shot down, then clues will be found within the FDR. Surely they would not want to find it.
I also will go on record and state that I believe the Australians are very close to MH370. I say this because I personally believe they have detected the ELTs of the Black Box.
I don't believe these sounds can be accurately duplicated. But, they are still a long way from finding MH370 some 4500m below the ocean. There is also a small chance that the detections were from another source so don't take this for a given.
The search is still extremely difficult. And if they find MH370, retrieval is also going to be a massive challenge but it is achievable!
Just a small correction here:
The sounds received were not accurate on the first place. They were if my memory is correct 33.2Khz instead of the expected 37.5 Khz.Try setting your radio a few 0.5Khz away from any station you won't hear anything. Regardless of that we can assume they came from the right device and all that distortion id due to the ocean.
However there are many devices that produce exactly the same sounds. I even posted the link of a company that sells identical beacons to boeing.
The specifications are the exactly the same: 37,5 Khz,pinging 0.9 times per second, and output signal at 165 db.
The guy who did the search on the titanic (?) said he wouldn't trust the acoustics. They used to place acoustic beacons on their findings he said, they knew exactly where their findings were, and the next day they couldn't hear anything or the receiver was guiding them in the wrong direction.
Also have a look here: The acoustics have the tendency of bending 90 degrees before they come to surface and travel as much as 17 Km before they come to surface. (LOL i lost the link-need to find it later if you are interested)
You mean 3.5Khz.
The frequency changes as the batteries fade out. In fact that was part of the criteria used to determine that the batteries were on their way out.
The detection at 3.3Khz was deemed to be consistent with that of the Black Box.
And yes, the water and its salinity can bend and refract the signal. They know this. What it does tell them however is that they are close to a man made source which is consistent with a Black Box.
It looks that it pays posting data in this forum rather than keeping them on my desktop and losing them.
Here's the data
cyprus41865-540.html#p78480532.3 Khz detected compared to 37.5 emitted.
I forgot to mention another critical parameter of the specs .The pitch duration emitted should be 10 milliseconds.
10 ms is a quite sharp and irritating noise. (I have posted samples before). They have not announced the pitch of the signal they received but from first look at their video the "clicks" were very long probably about 100 ms. I did downloaded and measured some of those they were indeed too long.
The power of the signal emitted is about 165 db and we know from facts that it should weaken by 06 db per km-if my memory is correct
So we have 4 parameters
frequency emitted 37.5 Khz
Number of clicks: 1 every 1.1 seconds
Amplitude emitted 165 db
Pitch duration: 10 mili seconds.
They received at 32.3 Khz
Number of clicks: Some at 1.1 seconds some at random
Amplitude received:unknown
Pitch duration received: >100 ms
If it weren't for the number of clicks being consistent (and even for those i cannot be sure because i only counted 3 of them) I would personally scrap the whole thing. But then again, i don't have any advanced software, nor the original signal to test it myself nor the amplitude, I can set a number of reasons that the frequency shifted so much, so in a nutshell I have to accept they got true signals within expected parameters.
Now if those were from the black box or from anything else who knows?
NB.Notice the Original signal at 37.5 Khz is not audible to the human ear. You need specially designed detectors to get it.
To make it audible you need to convert it to below 20 Khz.