How can a hidden microphone be detected?

Discussion in 'General Electronics Chat' started by Abdul_Haseeb, Nov 2, 2013.

  1. Abdul_Haseeb

    Thread Starter New Member

    Nov 2, 2013
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    kindly guide me about how can we detect any hidden microphone?
     
  2. MaxHeadRoom

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    Jul 18, 2013
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    Hard wired/self contained or wireless?
    Max.
     
  3. ian field

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    Oct 27, 2012
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    If it doesn't transmit RF, you're probably screwed.

    If it does transmit RF, you only need a receiver tuned to the same frequency and it will "howl-round" just like an amp with the MIC too close to the speaker.

    If the nefarious person has included an audio frequency shifter - you're still screwed!
     
    absf likes this.
  4. mcgyvr

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    Oct 15, 2009
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    You can't.. that's why they call it "hidden" :)
     
  5. atferrari

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    It actually depends how well...
     
  6. nsaspook

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    JohnInTX, Danm1 and #12 like this.
  7. WBahn

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    Assuming they haven't included an audio frequency shifter, wouldn't it still depend on you using a demodulation scheme that corresponds to the modulation scheme used by the mic?
     
  8. strantor

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    Oct 3, 2010
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    Use a black light. Hidden microphones glow under a black light.
     
  9. WBahn

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    Is that how one distinquishes between hidden and non-hidden microphones? :D
     
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  10. ScottWang

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    Aug 23, 2012
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    Haha, that's a good example ...
     
  11. Abdul_Haseeb

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    Nov 2, 2013
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    I have watched a movie in which a pakistani girl spied on an intelligence agent. When they check their home they find hidden microphones.
     
  12. #12

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    Nov 30, 2010
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    I have watched a movie in which a man could fly.
    That does not mean it is true.
     
  13. ian field

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    An AM receiver will pick up an AM bug - an AM receiver will pick up an FM bug if its slope tuned.

    If the nefarious person has spent some dosh on digital encoding - you're going to have to spend some dosh for gear to detect it!
     
  14. Danm1

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    Jul 19, 2010
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    When you meet this person who you think may have the hidden microphone, just make sure it's in a place of your choosing and where it would be hard to hide a wire, like a steam room. This is what they did in the Mafia movie I saw last week.

    But these days, they might also have some partner with a big parabolic dish microphone hiding across the street.
     
  15. ErnieM

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    Apr 24, 2011
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    The Russians have placed some marvelous bugs in our Embassies. One was powered by dissimilar metals embedded in the concrete foundation.

    My favorite one was not powered at all. Instead it modulated a external broadcast signal: no signal broadcast, no signal out. We screened it (it was placed a wood carving) and when it came up clean it was placed in the ambassador's office. Once visitors confirmed it's location the external signal was applied.

    Gotta love the History Channel.
     
  16. wayneh

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    Sep 9, 2010
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    Unhidden ones will glow too, if your cat has peed on it. :p
     
  17. adamclark

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    Oct 4, 2013
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    call the NSA,, I hear they are the leading "buggers" these days.. lol.. This is how I see things, We are all monitored somehow at this day and age. you cant leave your house without being recorded in some manner.. The powers that be have made it extremely hard to be "off grid".. if you are conducting some sort of actions that would make you nervous to be watched or heard then its up to you to take the right precautions.. If you are concerned about a mic being hidden on your property, don't do or say anything incriminating in that area.. Furthermore do some research on the surveillance techniques used by those who you believe may want to record your actions.. there are many different techniques used by organizations.. so you need to determine the level of those who are surveilling you.. if its just a friend or girlfriend or something the tech is going to be very low and easy to figure out,, but say something on the feds level, it might just be in your best interest to lay low and really watch yourself...
     
  18. Alec_t

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    Sep 17, 2013
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    Doing that may, in itself, draw the attention of those very people/organisations :)
     
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  19. strantor

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    Oct 3, 2010
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    Pursuant to this thread, Mr hasseeb may already be a missing person.
     
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  20. Abdul_Haseeb

    Thread Starter New Member

    Nov 2, 2013
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    microphone is an input device. I don't think it transmit anything. It receives sound waves.
     
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