Parabolic Microphones,

Ratfink11

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Hey All,

I posted a response on another post regarding Microphones, Sensitivity issues, noise, and Parabolic Domes.
There was some interest so I though I would post here if this is useful as others are asking what these look like and the distances I have been getting with certain Microphones.

The Microphone that I use, and I think most of us use for our outdoor cameras is the Microseven M7WP Waterproof Microphones. Link is HERE
These are really good microphones, and surprisingly sensitive.

Mounting Microphones:
  • Use a powered mic. One that needs its own power.
  • Use properly made cables and connectors, preferably not cheap ones as you will get noise.
  • If you use a separate dc Power supply a 12vdc 500ma will work perfect. The power specs for these mics are 12vdc @ 17ma.
  • Make sure you cameras power supplies are plugged into a PROPERLY GROUNDED AC outlet. If you don't you will get AC hum noise.
  • Verify you connect negative to negative and positive to positive from the camera mic inputs to the microphones. Dont reverse polarities ever. Same goes for speakers for cameras. Be aware some if not most camera manufactures share the negative ground for BOTH microphone and speaker connections.
  • Use the shortest power and microphone cable as needed, If you need a 20 foot length then use just a 20 foot length. If you need a 3 foot length then use only a 3 foot length. NEVER EVER, get a 20 foot length then wrap it up with a tie strap for a 3 foot length. You are asking for trouble with noise and hum issues. It will drive you batty. stretch the full length of cable distance out, and away from any other AC or DC power cords, any other speaker wire, or any other light sources... ESPECIALLY FLORESCENT, LED, OR NEON LIGHTING. Do not route near TV's, computers, radios. Do not tie strap your microphone cords TO ANY OTHER CORDS...
  • Mount microphones away from the camera.... DO NOT MOUNT ON THE CAMERA.
  • Do not mount microphones near any speakers.
  • Do not mount microphones on any surface that is noisy, such as the side of a metal building.
  • Best way to mount a microphone is to use a piece of bicycle inter tube on a pole or a piece of wood. The inter-tube acts as a noise insulator and creates a dead mount space.
Like I said these particular mics are very sensitive. During a quiet evening, at 850 feet, direct line of sight, on an asphalt paved property I can drop a nickel on a piece of train track and hear it easily. If you want an even cleaner louder and more sensitive sound and greater distances then you can build or buy yourself a Parabolic Mic setup. I have added a few links and pics below... These make an enormous difference in detection and listening in on homeless aholes that are intent on robbing you weekly constantly trying every other day to outsmart a trillion cameras.:screwy::poop:

I have several of these setup around my property and it has made a difference when police are called and they dont want to arrest these losers.... These homeless holes always say they got lost, taking a short cut, or didnt see the NO TRESPASSING signs, or the RAZOR wire they climbed over, or the lock they cut. Since I live in The Socialist Slave Fish Police Republic of Washington State, they dont arrest criminals here. They give them free drugs, cell phones and child prostitutes. SORRY, I DIGRESS! It makes a difference when you have a recording of these homeless holes making plans on what crow bars to bring, which friends, who the lookouts are going to be, and what they are going to steal, and which door they are going to break down..... This is useful when you need to force law enforcement to do their jobs they are not allowed to do due to the politicians...

  • How to roll your own Parabolic Mic setup, link is HERE
  • If you want to purchase purpose made acrylic parabolic microphone dish kit. Link is HERE
  • Pic of a ready made with part names, 1586848632327.png
  • Pics of other materials used for Parabolic mics, such as umbrellas, potato chip bowels, garbage can lids, lamp shades etc... 1586848740451.png, 1586848765479.png, 1586848794148.png, 1586848808553.png.

I hope this is somewhat useful, it has been for me. Its not enough these days to have video, you need 2way audio and recorded sound of the "Holes" plotting against society...
Best
Rat
 

kloverprod

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Here are some more parabolic microphone options to consider: Available Models of the Klover MiK Parabolic Microphone – Klover Products

If you do try to build your own parabolic mic, please don't expect great results if you don't use a reflector that has a true parabolic shape. The shape of the reflector, and the reflectivity of the material (harder is better), makes all the difference.
 

Ratfink11

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....And this is an exact and perfect reason and use of forums and the Web... To find vendors like Klover... Im buying the KM-09's from now on with my Microseven Mics... I could have saved so much more time.

....And as Kloverprod pointed out... A true parobolic shape will give best results, with materials such as Acrylics, Polycarbonates, Steel, Aluminum. Btw... Really nice products...
 

CCTVCam

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A satellite dish is usually a true parabola focused on where the feed horn / LNB goes. Maybe a cheap source.
 
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