How To: Eavesdrop from a Distance with This DIY Parabolic "Spy" Microphone
Want to find out if your neighbors are talking about you? You could always hack their webcam or turn your iPhone into a secret spy camera, but unless you have a key to their house, that could be tricky to do without getting caught.With this DIY parabolic microphone from the folks over at GBPPR, you can listen in from a distance and do your sleuthing without ever leaving the couch. Image via sourcedns.com A parabolic microphone uses a parabolic reflector to focus sound waves onto a receiver. This makes it a lot more sensitive than a normal microphone (think of it like a satellite dish for audio). They're used for everything from sports broadcasting to nature recording, to more nefarious purposes like eavesdropping and law enforcement.To build your own, you'll need a parabolic reflector, which is the hardest part to find (GBPPR recommends eBay seller sdill471). For this setup, an aluminum wok lid was mounted behind the reflector with an L-bracket to keep it from flexing. You'll also need a 3.5" tweeter speaker and an electret microphone, which you can find at RadioShack. A low-noise amplifier circuit adds 40dB, and can be put into "boost mode" to pick up even more. The whole thing is mounted on a standard camera tripod.You'll need some minor circuitry skills, but overall, this isn't a super complicated build. You can find schematics as well as detailed instructions over on GBPPR or from their zine. Check out the video to see it in action. Please enable JavaScript to watch this video.
Wanna try a simpler version? You can turn an umbrella or megaphone into a lower-tech parabolic mic. Don't have either of those? The video below will show you how to hack one out of a salad bowl. Please enable JavaScript to watch this video.
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To hear through walls, start by finding a drinking glass with a wide rim. Then, hold the rim of the glass against the wall you want to listen through and rest your ear on the bottom of it. Sound waves will travel through the wall and into the glass, making it easier for you to hear through it!
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Eavesdrop from a Distance with This DIY Parabolic "Spy
Build a Laser Microphone to Eavesdrop on Conversations Across the Street. You can build a basic laser microphone using a laser pointer, an NPN PhotoTransistor, a headphone amp, and a handful
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Here's a surprisly simple way to build yourself a laser-based listening device. It consists of two modules, a transmitter and a receiver. The transmitter is a set of lasers, one is visible red
With this DIY parabolic microphone from the folks over at GBPPR, you can listen in from a distance and do your sleuthing without ever leaving the couch. Image via sourcedns.com A parabolic microphone uses a parabolic reflector to focus sound waves onto a receiver.
How To: Eavesdrop from a Distance with This DIY Parabolic
Eavesdrop from a Distance with This DIY Parabolic "Spy" Microphone Spy Equipment Must Have Gadgets Spy Gadgets Cool Gadgets Spy Microphone Computer Projects Ham Radio Spy Camera Online Games More information
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Over the next few months, I'll be focusing on building a fully functional, long range UAV. This series will consist of several in-depth articles on my progress and the steps involved, so you can follow along and build your own unmanned aerial vehicle!
Mini Parabolic Spy Microphone - cedcollegepark.com
Spy Microphone | eBay Find great deals on eBay for Spy Microphone in Surveillance Gadgets. Shop with confidence. Surveillance Microphones, Spying Audio Mic & Devices Surveillance Microphone: Surveillance audio microphone, wired mic or non wired passive mic , and sound amplifier, you can listen to conversations across the street Parabolic - Shotgun Microphone - Home Spy New Model 2016.
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Eavesdropping from a distance can be tricky because it usually requires some sort of bug or transmitter. It's easy to transmit audio through lasers, but you can also use lasers to build a microphone that picks up audio from a distance. LucidScience built the Laser Spy System for about $20.
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Eavesdrop from a Distance with This DIY Parabolic "Spy" Microphone Want to find out if your neighbors are talking about you? You could always hack their webcam or turn your iPhone into a secret spy camera, but unless you have a key to their house, that could be tricky to do without getting caught.
How To: Eavesdrop from a Distance with This DIY Parabolic
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