New lower price for Axon II ($78) and Axon Mote ($58).
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How about broadcasting white noise via radio? I mean... not modulated, just generated and sent via an antenna. A simple sine wave would do, i think, but it won't be as effective as white noise, or pink noise for that matter.
It's just like standing with a cell phone close to a TV or a stereo, and you hear those digital noises.
Hi,Small microphones won't be sensible at sub-audible frequencies. Most of them are limited to less than the audible range.Only way to jam some of them (not all, as this cannot be done) is to pulse a signal with extremely fast rise times, as this will interfere with some recorders.A well designed recorder will be immune though and I don't think there's a way to scramble pro recorders like my Zoom H4.Best way to outlive that paranoia is a full body search (although it won't catch all either).What is the purpose?
I am making it so that no one can record my private talks.
Hi,Quote from: karmax on May 09, 2010, 06:28:08 AMI am making it so that no one can record my private talks.Oh, I was under the impression that you asked us to make it As TrickyNero pointed out so gentle, it's really a bit self-centered to think that the rest of the world would be interested in recording what your lips pass.Surround yourself whit huge amounts of white noise and talk close so somebodys ear... Or don't talk about what you won't risk others to hear/record.Technology is not a replacement for common sense.
Well... How about standard 50Hz induced noise? Let me give you an example: when i play my guitar (electric), depending on my orientation relative to my computer, i hear a 50Hz noise in my speakers. There are no connections between my computer and my sound amplification. The strings on my guitar act just like an AM antenna.
Also, as far as i know, in AM broadcasting, you use a low frequency wave (a voice, let's say), which is modulated with a high frequency sine wave (in the MHz or kHz regions). I was talking about sending just an unmodulated carrier, but not in the MHz region, but somwhere around 1000Hz. There should be no modulation involved. Just like with the 50Hz mains noise, it would get induced in the wiring of a recorder, which would act like an antenna.
Anyways, there could be problems with this: the antenna might be too large, low frequency broadcasts require more power, and if the recorder has proper shielding or grounding, it won't work.
As i said earlier also that its for university project thats true as our university vice chancellor given this project to our team and why should i need audio recorder jammer ?There is no use for me ...I hope you will understand my concern and help me for the same.
As TrickyNero pointed out so gentle, it's really a bit self-centered to think that the rest of the world would be interested in
It's more logical to EMP the recording device than trying to jam it... And EMP isn't that hard... to make after all... X-D
You don't wonder anymore why I'm just a fan of big kabooms??"Don't play with matches.... hahhaha"