Do the Listening Devices like this one work?



I have seen a show on Discovery about the listening devices. They have tested this type of spy gadgets and the conclusion was you can't spy someone because of the background noise.
You won't be able to hear a conversation in an open space. The test was done in a park.

There is one question: If the person you want to spy is in a house you will be able to hear the conversation?

And one more question: have someone tested a listening gadget?

Well at least this is much better than using a drinking glass and sticking it up a wall at the other end and then clinging it to your ear at the other end.

Dude such devices work for experts
who can minimize the noise.
But for common ppl its of no use
But yea it surely helps out in closed areas
But working with such gadgets is awesome fun.

I think these type of devices will work at the places where there is no noise and even this will work for the experts who could able to minimize the sound.

lol u copied wat i said
lmao dude
bring something of ur own...

Yes but the glass is cheaper.

Well i dont know weather i would like to have this kind of gadget, but i think the hi-tech ones that FBI or some other organisations have really do work.

I ever seen people using this type of gadget in one of paranormal series at Starworld Channel. Have anybody seen that series. Its similar right.

The idea of a listening device in a pen or something sounds great. I would love to leave that at work and see what is said about me, if anything!!

Wow that would be cool. This should be easy to do because you only need a pen and a sound recorder, but the problem is that there are very little room in that little pen to fit the whole sound recording equipment, although nowadays technology can everything