Page 2 of 2 FirstFirst 12
Results 11 to 19 of 19

Thread: Using lasers to deter burglars

  1. #11
    Join Date
    Jan 2006
    Location
    Charleston, SC
    Posts
    2,147,489,497

    Default

    I'm sure people can do plenty of harm with the magnetron from a microwave - to themselves! (Lol) Plenty of stories of people getting hurt while messing around inside the guts of a microwave oven.

    But I agree that you'd need crazy high power (or better yet, a coherent source like a maser) to have any hope of stopping someone before they ran right past the field. Although here again, the US Military did look into this sort of technology back in the day. The idea was to use high power RF as a "cage" of sorts. The field got stronger as you approached the edges of the containment area, so the theory was that people would naturally stay in the center area where the field strength was minimal.

    The problem, of course, is that to be an effective deterrent, it had to be a very powerful RF field (to prevent someone from making a mad dash for freedom and sprinting past the edges of the cage before they were seriously burned). The result was that the "cage" was lethal in certain circumstances, which was the exact opposite of their goal. Also, it would have been very expensive and cumbersome. Not one of uncle Sam's brighter ideas, that one...

    Adam

  2. #12
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
    Posts
    2,609

    Default

    Something just as nasty is ultrasonics. I’ve experienced this and well it is most unpleasant.

  3. #13
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,491

    Default

    ... even more damaging is infrasound - while ultrasound gets on the ears (deafening them) and skin-nerves, the ultra low sound frequenzies, when applied with enough amplitude, will crush jour internal organs and bones
    Aufruf zum Projekt "Müll-freie Meere" - https://reprap.org/forum/list.php?426
    Call for the project "garbage-free seas" - https://reprap.org/forum/list.php?425

  4. #14
    Join Date
    Jan 2006
    Location
    Charleston, SC
    Posts
    2,147,489,497

    Default

    Quote Originally Posted by VDX View Post
    the ultra low sound frequencies, when applied with enough amplitude, will crush jour internal organs and bones
    At what point does it transition from "Infrasound" to "Blast Wave"?

    Adam

  5. #15
    swamidog's Avatar
    swamidog is online now Jr. Woodchuckington Janitor III, Esq.
    Join Date
    Nov 2006
    Location
    santa fe, nm
    Posts
    1,545,789

    Default

    somewhere between brown note and jamification.

    Quote Originally Posted by buffo View Post
    At what point does it transition from "Infrasound" to "Blast Wave"?

    Adam
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  6. #16
    soforene's Avatar
    soforene is offline The Troll formerly known as Herbert Von Poople-Futtocks
    Join Date
    Aug 2007
    Posts
    2,930

    Default

    Dude.
    You're over-thinking.

    Post notices on all entrances stating "I have several guns and I will shoot you if you enter my property with unlawful intent".

    Shoot them if they enter your property.

    100% Unambiguous.
    You gave fair and legal warning.

  7. #17
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,491

    Default

    ... this remembers me on sevral cases in the US -- one, for example, where the home-owner "gave fair and legal warning" and then shoot the 16 years old son of his neighbour
    Aufruf zum Projekt "Müll-freie Meere" - https://reprap.org/forum/list.php?426
    Call for the project "garbage-free seas" - https://reprap.org/forum/list.php?425

  8. #18
    Join Date
    Nov 2021
    Location
    Tucson, AZ
    Posts
    45

    Default

    Quote Originally Posted by soforene View Post
    Dude.
    You're over-thinking.

    Post notices on all entrances stating "I have several guns and I will shoot you if you enter my property with unlawful intent".

    Shoot them if they enter your property.

    100% Unambiguous.
    You gave fair and legal warning.
    Real sign on neighbor's front door:
    "Notice!
    Due to current ammo shortages, There will be no warning shots for trespassing.
    What goes around, comes around;
    We project what others reflect.

  9. #19
    Join Date
    Nov 2021
    Location
    Tucson, AZ
    Posts
    45

    Default

    Quote Originally Posted by kecked View Post
    Something just as nasty is ultrasonics. I’ve experienced this and well it is most unpleasant.
    Yes, while standing in the middle of a disco stage, within the focal point of an overhead quad PA, during a sound engineer's EQ balancing, the rumblings within my innards became uncomfortably nauseous.
    When he put Dire Straits' 'Private Investigations' on, it wasn't too loud to the ears, yet I could feel it internally.
    Very memorable example of perfectly balanced sound engineering.
    Last edited by TheHermit; 12-31-2024 at 16:39.
    What goes around, comes around;
    We project what others reflect.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •