[quote]A patrol ship searching for the missing Malaysian passenger jet has detected a pulse signal in the Indian Ocean, Chinese state media is reporting.
Xinhua news agency says the signal discovered by Chinese vessel Haixan 01 has a frequency of 37.5kHz per second - the same as that emitted by black-box devices.
The update has yet to be confirmed by authorities.
Radar expert Professor David Stupples told Sky News: "If there has been a signal received, it could be the black box or it could be something extraneous.
"I don't know anything (else) that puts out the 37.5kHz signal."
[/quote]
[url]http://news.sky.com/story/1237620/missing-plane-ship-detects-signal-in-ocean[/url]
Christ, about time they've got something substantial. Hopefully they find the wreckage from this.
[QUOTE]37.5kHz per second[/QUOTE]
Nice!
[QUOTE=Swebonny;44459295]Nice![/QUOTE]
37.5kHz^2?
"If there has been a signal received, it could be the black box or it could be something extraneous."
So it could be something or nothing?
Thanks TV expert.
[QUOTE=SataniX;44459302]37.5kHz^2?[/QUOTE]
More like 37,500 s⁻¹ * s = 37,500
They eliminated the unit those crazy bastards
[QUOTE=DrDevil;44459316]More like 37,500 s⁻¹ * s = 37,500
They eliminated the unit those crazy bastards[/QUOTE]
Wouldn't per second be 1/s?
In this case, Hz = 1/s so 1/s * 1/s = 1/s^2.
what the fuck is all this math nerd speak
[QUOTE=SataniX;44459320]Wouldn't per second be 1/s?
In this case, Hz = 1/s so 1/s * 1/s = 1/s^2.[/QUOTE]
Eh whoops brainfart, you're right of course
[QUOTE=Swebonny;44459295][QUOTE]37.5kHz per second[/QUOTE]
Nice![/QUOTE]
Yeah, I twitched as well.
For anyone who's wondering what's this about, a Hertz is a unit of measure that describes how many times something happens per second. Thus, to say that something has a frequency of X Hz per second is incorrect. It's kinda like saying "PIN number".
[QUOTE=Headhumpy;44459369]Yeah, I twitched as well.
For anyone who's wondering what's this about, a Hertz is a unit of measure that describes how many times something happens per second. Thus, to say that something has a frequency of X Hz per second is incorrect. It's kinda like saying "PIN number".[/QUOTE]
Or ATM machine
Or, my favorite, RIP in peace.
Or ATMOS system.
They better hurry all the ships over to that area at 10,000 MPH per hour; the black box pulse battery is going to run out in a few days and then it could be lost forever
[QUOTE=Headhumpy;44459369]Yeah, I twitched as well.
For anyone who's wondering what's this about, a Hertz is a unit of measure that describes how many times something happens per second. Thus, to say that something has a frequency of X Hz per second is incorrect. It's kinda like saying "PIN number".[/QUOTE]
This really shouldn't need to be explained.
[QUOTE=Commando1234;44459418]Or ATM machine[/QUOTE]
RPG game
[QUOTE=Killuah;44459765]This really shouldn't need to be explained.[/QUOTE]
Unless their work is related, people don't learn a lot about frequencies. Even if they learned it at school, it's easily forgotten unless they actually use it.
Survivors confirmed.
[QUOTE=Oscar Lima Echo;44459982]Unless their work is related, people don't learn a lot about frequencies. Even if they learned it at school, it's easily forgotten unless they actually use it.[/QUOTE]
Its badly worded, but they may have meant a 37.5 kHz pulse every second.
EDIT: Looked it up. Yep, they emit ultrasonic pulses of 37.5 kHz at a one second interval for locating.
Can someone explain how frequency works to someone who was kicked out of highschool after a month? I have a very basic understanding from doing things related to HAM Radios but that's as far as it goes.
[QUOTE=Matthew7434;44459331]what the fuck is all this math nerd speak[/QUOTE]
shut up nerde
[QUOTE=JoeSkylynx;44460076]Can someone explain how frequency works to someone who was kicked out of highschool after a month? I have a very basic understanding from doing things related to HAM Radios but that's as far as it goes.[/QUOTE]
Its sort of the time is takes for something to oscillate back in forth in a given second. In this case, the signal would oscillate 37.5 thousand times in one second.
[QUOTE=JoeSkylynx;44460076]Can someone explain how frequency works to someone who was kicked out of highschool after a month? I have a very basic understanding from doing things related to HAM Radios but that's as far as it goes.[/QUOTE]
Frequency is just "how frequent". It's how many times something happens for each second.
[T]http://upload.wikimedia.org/wikipedia/commons/thumb/5/59/FrequencyAnimation.gif/220px-FrequencyAnimation.gif[/T]
[T]http://www.indiana.edu/~emusic/acoustics/Fig4.gif[/T]
[QUOTE=JoeSkylynx;44460076]Can someone explain how frequency works to someone who was kicked out of highschool after a month? I have a very basic understanding from doing things related to HAM Radios but that's as far as it goes.[/QUOTE]
The signal that the black box emits is a sinusoidal wave, like the picture below.
[IMG]http://thesmarttech.files.wordpress.com/2012/06/sine-wave.png[/IMG]
The Period is the amount of time that the waveform takes to loop from start to finish. The period in this case is only a fraction of a second so if you divide one second by the length of the period, you get the number of times that the waveform will loop during one second(The frequency which is measured in hertz).
[b]EDIT:[/b]
Well I got beaten. Anyway the black box emits a signal at 37.5kHz (or 37500Hz). That makes the period 1/37500=26 microseconds which means it takes the waveform 1/37500 of a second for the waveform to cycle from start to finish.
Still a tad confusing, but I'll get it eventually. So how far out are they guessing the object that's pinging is at?
UOTE=JoeSkylynx;44460212]Still a tad confusing, but I'll get it eventually. So how far out are they guessing the object that's pinging is at?[/QUOTE]
You can never be quite sure, since wireless is tricky business, because of attenuation and such. But it can't be too far off. They may be able to triangulate it at as well using 3+ receivers.
[QUOTE=Pepsi-cola;44459305]So it could be something or nothing?[/QUOTE]
Gotta cover every base.
[QUOTE=Pepsi-cola;44459305]"If there has been a signal received, it could be the black box or it could be something extraneous."
So it could be something or nothing?
Thanks TV expert.[/QUOTE]
I heard on the radio they only heard it once, which means it could be anything. Like it could just be an animal making a noise.
I swear some people in this thread learned more about physics than they did in school.
[QUOTE=Commando1234;44459418]Or ATM machine[/QUOTE]
Or EMP pulse.
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