Ultrasound & Jamming |
Ultrasound & Jamming |
Nov 21 2010, 05:04 PM
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#1
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Moving Target Group: Members Posts: 211 Joined: 21-November 10 Member No.: 19,182 |
Is a jammer effective against Ultrasound? Or do you need to use a White Noise Generator?
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Nov 21 2010, 05:10 PM
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#2
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Great Dragon Group: Members Posts: 5,542 Joined: 30-September 08 From: D/FW Megaplex Member No.: 16,387 |
I think the book states that Ultrasound is more succeptable (spelling?) to jamming than normal, but it gives no rules. I'd say reduce the Sensor of Ultrasound by 2 or 4 for Jamming. A white noise generator simply masks your words and prevents people from listening in unless they beat your Generator's rating - it's the same but different.
Speaking of jamming, I think the jamming rules are awful as-is. At my table, Jammers reduce the rating of all Signals in their effect by their rating, but otherwise follow the rules of jamming (reduced reduction the further away from epicenter you are), and if a signal is reduced to 0 it can't broadcast. |
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Nov 21 2010, 05:15 PM
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#3
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Great Dragon Group: Members Posts: 5,679 Joined: 19-September 09 Member No.: 17,652 |
Why in the world would ultrasound (that utilizes sound) be affected at all by a jammer (that utilizes electromagnetic noise)?
That's like clapping my hands should mess up someone's vision. |
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Nov 21 2010, 07:54 PM
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#4
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Immortal Elf Group: Members Posts: 10,289 Joined: 2-October 08 Member No.: 16,392 |
That's like clapping my hands should mess up someone's vision. Hey, it worked in How To Train Your Dragon. (IMG:style_emoticons/default/wink.gif) |
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Nov 21 2010, 08:46 PM
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#5
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Great Dragon Group: Members Posts: 5,679 Joined: 19-September 09 Member No.: 17,652 |
Hey, it worked in How To Train Your Dragon. (IMG:style_emoticons/default/wink.gif) Oh? I kind of wanted to see that but never got around to it. May have to put it on my netflix list next time I want something funny. |
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Nov 21 2010, 10:38 PM
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#6
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Advocatus Diaboli Group: Members Posts: 13,994 Joined: 20-November 07 From: USA Member No.: 14,282 |
No, you can't jam ultrasound, unless you had some nifty ultrasound jammer. (IMG:style_emoticons/default/biggrin.gif)
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Nov 21 2010, 10:41 PM
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#7
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Great Dragon Group: Members Posts: 5,679 Joined: 19-September 09 Member No.: 17,652 |
That would be a dog whistle, right? (IMG:style_emoticons/default/wink.gif)
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Nov 22 2010, 04:58 AM
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#8
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Moving Target Group: Members Posts: 211 Joined: 21-November 10 Member No.: 19,182 |
Ultra-Wide Band Radar can be jammed, so I guess the difference is sound waves vs radio signals? I thought difference between sound and radio signals was frequency of waves (higher for radio vs ultrasound), so thought maybe jammer with wide enough frequency range would work.
What is the range for Ultrasound? |
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Nov 22 2010, 05:08 AM
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#9
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Great Dragon Group: Members Posts: 5,679 Joined: 19-September 09 Member No.: 17,652 |
Ultra-Wide Band Radar can be jammed, so I guess the difference is sound waves vs radio signals? I thought difference between sound and radio signals was frequency of waves (higher for radio vs ultrasound), so thought maybe jammer with wide enough frequency range would work. What is the range for Ultrasound? Yes, UWBR uses radio waves. Sound waves and electromagnetic waves aren't even... well, okay, they're vaguely similar in that they are both waves and have frequencies and such, but they are different in a very important way: Sound waves are the vibration of molecules (usually air) and electromagnetic waves are the movement of photons. Thats ultra basic to the point of being slightly wrong, but it gets the point across. |
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Nov 22 2010, 05:22 AM
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#10
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Runner Group: Members Posts: 2,782 Joined: 28-August 09 Member No.: 17,566 |
Is there any reason you couldn't use an ultrasound sensor of your own to jam-on-the-fly with?
As a sensor, it DOES have a Signal. |
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Nov 22 2010, 05:26 AM
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#11
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Great Dragon Group: Members Posts: 5,679 Joined: 19-September 09 Member No.: 17,652 |
Is there any reason you couldn't use an ultrasound sensor of your own to jam-on-the-fly with? As a sensor, it DOES have a Signal. Same reason that two bats can fly together I'm guessing. They'd be designed to put out slightly different frequencies so as to specifically not mess each other up. That said, I'm sure that you certainly could make a jammer for ultrasound, or even modify your own to mess with someone else's, but I don't think that it'd be a standard feature (if only because it isn't mentioned). Edit: Actually that isn't completely right about how bats do it, they actually do a particular pattern in their ultrasound bursts, so they'll be able to tell if something is their own or from another bat. They can be tricked though, but it is very difficult. Depending on how ultrasound goggles operate, it could actually be very difficult to trick them. The trick for bats has to be individualized to the bat's clicks. Then again, have your jammer pick up on that pattern, and then fire out random noise in that pattern and you could mess someone up fairly well. |
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Nov 22 2010, 05:57 AM
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#12
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Moving Target Group: Members Posts: 241 Joined: 28-September 10 Member No.: 19,081 |
There actually isn't any reason you couldn't 'jam' ultrasound. It is sound waves, with the right instrumentation and generators you can destructively interfere with it to the point of having little to nothing perceived. Or you could, as previously noted, white noise it and fill the entire area with too much ultrasound for the instruments to differentiate. There are a couple of other methods to do it technologically but the last way you could try it is to just.
Silence. And poof. Ultrasound magically jammed. |
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Nov 22 2010, 06:19 AM
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#13
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Advocatus Diaboli Group: Members Posts: 13,994 Joined: 20-November 07 From: USA Member No.: 14,282 |
That's the opposite of jamming, but sure. (IMG:style_emoticons/default/smile.gif)
Basically, the game doesn't have sound jammers, and we *know* it's stupid to allow radio jamming to in any way interact with sound… so you're left without sound jamming. Oh well. There *are* counters, or you can invent the sonic jammer. It'd work just like the radio ones, basically. |
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Nov 22 2010, 07:23 AM
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#14
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Great Dragon Group: Members Posts: 5,537 Joined: 27-August 06 From: Albuquerque NM Member No.: 9,234 |
HE grenades make the best ultrasonic jammers. Machine guns on cyclic are next best.
(IMG:style_emoticons/default/wink.gif) |
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Nov 22 2010, 10:45 PM
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#15
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Great Dragon Group: Members Posts: 5,542 Joined: 30-September 08 From: D/FW Megaplex Member No.: 16,387 |
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