You will even be getting a fine tuning frequency knob to adjust how wide the sound reception is, in order to focus in on one soundĪbout Walsoon Spy Listening Device Extreme Sound Added to this, there is a built in monocular which will let you see objects at up to x8 magnification, and a digital sound recorder to record the sounds you hear. Gadget Spy device which acts as a Bionic Ear, letting you hear faint sounds up to 20~30 Meters away, and loud sounds at an incredible 100 Meters on the included comfortable and high quality Stereo Headphone. ![]() See 8 times closer with built-in 8X monocularĭesign for outdoor person, hunting, sporting or all entertainment venuesīird watchers and nature lovers will be thrilled at the sound quality of this ingenious listening device Here’s a view from my house deck, facing the Sourland Mountains.Walsoon Spy Listening Device Extreme Sound Features Squirrel baffle repurposed as a parabolic listening station. The idea of using a wireless transmitter in tandem with a parabolic dish makes a lot of sense - you can tune out unwanted noise, and tune more directly into nature. Surprisingly, commercially produced dishes don’t have this feature. Instead you can listen in via a simple FM radio (or even several radios). That’s where this design distinguishes itself - it’s unique in that you can monitor sounds from a distance without being tethered to the dish. These were also commonly advertised in the back of Silver Age comic books along with novelty x-ray specs and real live monkeys and dogs that fit into a tea cup! Adding a Wireless TransmitterĪfter building the parabolic dish microphone, my next step was to wirelessly transmit sounds captured by the dish for remote listening. (Prior to watching his video, I had tried several different parabolic shapes - from salad bowls to 30″ satellite dishes.)Īfter testing several microphone options, I found that using a Velleman kit - which included both miniature microphones and an amplifier on a small circuit board - was the most robust and efficient solution.Īdditionally, I combed old RadioShack catalog archives and found a “Big Ear” parabolic mic in the 1963 catalog. I owe inspiration to a video by Phillip Brummet. Repurposing a squirrel baffle as a parabolic dish is not an original idea. So what’s a squirrel baffle? It’s basically a big upside-down bowl that prevents rodents from climbing a pole and stealing food from a bird feeder. Read the instructions carefully and use plenty of patience as you solder. This kit is not too difficult for beginners. In addition to building the parabolic dish and PVC handle, you’ll need to assemble a stereo amplification kit, which requires through-hole soldering skill. If you go further and capture the FM signal on your computer, you can even discover characteristics within the noise not possible to hear with unaided ears. With this project, you can selectively amplify distant sounds and transmit them wirelessly to any FM radio. Parabolic mics are popular with nature lovers for recording birdsongs and other wildlife, and they’re great for eavesdropping on players’ chatter on the sports field. Parabolic microphones gather and focus sound waves the way a satellite dish focuses radio waves, making it possible to listen to the quietest of sounds hundreds of feet away. If you want to listen to faint sounds far away, you’re going to need a bigger ear. Gift the gift of Make: Magazine this holiday season! Subscribe to the premier DIY magazine todayĬommunity access, print, and digital Magazine, and more Share a cool tool or product with the community.įind a special something for the makers in your life. Skill builder, project tutorials, and more Get hands-on with kits, books, and more from the Maker Shed Initiatives for the next generation of makers.
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